Migotanie komór
Diagnostyka i diagnoza

Migotanie komór (VF) to krytyczne zaburzenie rytmu serca charakteryzujące się chaotyczną, nieskoordynowaną aktywnością elektryczną mięśnia sercowego, prowadzącą do braku efektywnego pompowania krwi i nagłego zatrzymania krążenia. Diagnostyka opiera się na monitorowaniu EKG, gdzie obserwuje się częstotliwość 300-400 uderzeń na minutę, brak rozpoznawalnych załamków P, QRS i T oraz nieregularne fale o zmiennej amplitudzie. Przedłużające się VF przechodzi od „grubego” do „drobnego” migotania, a następnie asystolii. Po stabilizacji pacjenta konieczne jest wykonanie szerokiego zakresu badań, w tym Holter EKG, echokardiografii, koronarografii, badań biochemicznych i genetycznych, aby potwierdzić przyczynę VF, ocenić stan serca i zaplanować profilaktykę nawrotów. W diagnostyce różnicowej należy uwzględnić torsade de pointes, częstoskurcz komorowy oraz artefakty elektryczne. Najczęstsze etiologie to choroba niedokrwienna serca, kardiomiopatie, kanałopatie oraz zaburzenia elektrolitowe i toksykologiczne.

  1. Migotanie komór – Diagnostyka
    1. Diagnostyka w warunkach nagłych
    2. Diagnostyka po resuscytacji
  2. Badania diagnostyczne w migotaniu komór
    1. Badania elektrokardiograficzne
    2. Badania obrazowe
    3. Badania laboratoryjne
    4. Badania inwazyjne
  3. Testy prowokacyjne w diagnostyce idiopatycznego migotania komór
  4. Badania genetyczne
  5. Diagnoza różnicowa
  6. Ocena czynników ryzyka
  7. Znaczenie szybkiej diagnozy
  8. Diagnostyka idiopatycznego migotania komór
  9. Postępowanie po diagnozie migotania komór
  10. Znaczenie diagnostyki w rokowaniu
  11. Nowe kierunki w diagnostyce migotania komór
  12. Znaczenie badań genetycznych w diagnostyce migotania komór
  13. Wnioski
    1. Kolejne rozdziały

Migotanie komór – Diagnostyka

Migotanie komór (VF, ventricular fibrillation) to najpoważniejszy typ zaburzeń rytmu serca, który charakteryzuje się chaotyczną, nieskoordynowaną aktywnością elektryczną mięśnia sercowego, prowadzącą do braku efektywnego pompowania krwi przez serce. Rozpoznanie migotania komór zazwyczaj odbywa się w sytuacji nagłego zatrzymania krążenia i stanowi bezpośrednie zagrożenie życia.12

Diagnostyka w warunkach nagłych

Migotanie komór jest diagnozowane zawsze w sytuacji nagłej. W przypadku nagłego zatrzymania krążenia, badanie pulsu ujawni jego brak. Ze względu na konieczność natychmiastowego działania, zespoły ratownictwa medycznego koncentrują się najpierw na przywróceniu czynności serca przed szczegółową diagnostyką przyczyny migotania komór.13

Podstawową metodą potwierdzającą migotanie komór jest monitorowanie EKG. W przypadku migotania komór, zapis EKG wykazuje charakterystyczne cechy:14

  • Całkowicie chaotyczną aktywność elektryczną
  • Częstotliwość 300-400 uderzeń na minutę
  • Brak rozpoznawalnych załamków P, zespołów QRS i załamków T
  • Nieregularne fale o różnej amplitudzie i morfologii

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Warto zaznaczyć, że przedłużające się migotanie komór prowadzi do zmniejszenia amplitudy fal, przechodząc od początkowego „grubego” VF do „drobnego” VF, ostatecznie degenerując do asystolii z powodu postępującego wyczerpania zapasów energetycznych miokardium.8

Diagnostyka po resuscytacji

Po skutecznej resuscytacji i stabilizacji stanu pacjenta, przeprowadza się szereg badań diagnostycznych mających na celu:39

  1. Potwierdzenie migotania komór jako przyczyny zatrzymania krążenia
  2. Zidentyfikowanie czynników, które mogły je wywołać
  3. Ocenę stanu serca po epizodzie migotania komór
  4. Ustalenie strategii zapobiegania nawrotom

Badania diagnostyczne w migotaniu komór

Badania elektrokardiograficzne

Elektrokardiogram (EKG/ECG) – podstawowe badanie potwierdzające migotanie komór. W migotaniu komór zapis EKG pokazuje częstotliwość około 300-400 uderzeń na minutę z całkowicie chaotycznym, nieregularnym wzorem. EKG jest kluczowym narzędziem zarówno w diagnostyce ostrej, jak i w późniejszej ocenie ryzyka nawrotu.104

Holter EKG – przenośne urządzenie monitorujące czynność elektryczną serca przez 24-48 godzin. Pozwala na wykrycie przejściowych zaburzeń rytmu, które mogą prowadzić do migotania komór.111213

Rejestrator zdarzeń (Event Recorder) – przenośne urządzenie monitorujące, które pacjent może nosić przez kilka tygodni. Rejestruje ono aktywność elektryczną serca w momencie wystąpienia objawów.1113

Wszczepialny rejestrator pętlowy (Implantable Loop Recorder) – małe urządzenie wszczepiane pod skórę klatki piersiowej, które może monitorować serce przez okres do dwóch lat. Jest szczególnie przydatne w przypadku rzadko występujących zaburzeń rytmu.1413

Badania obrazowe

Echokardiografia (ECHO) – nieinwazyjne badanie wykorzystujące fale ultradźwiękowe do utworzenia obrazu serca w ruchu. Pozwala ocenić wielkość i strukturę serca, funkcję zastawek oraz kurczliwość mięśnia sercowego. Jest niezbędna do wykrycia ewentualnych anomalii strukturalnych serca, które mogły przyczynić się do wystąpienia migotania komór.910

Rentgen klatki piersiowej – badanie obrazowe, które może pokazać wielkość i kształt serca oraz jego naczyń krwionośnych. Pomaga w wykryciu powiększenia serca, zastoju w krążeniu płucnym oraz innych nieprawidłowości anatomicznych.1

Tomografia komputerowa serca (CT) – wykorzystuje promienie rentgenowskie do tworzenia przekrojowych obrazów serca. Pozwala na szczegółową ocenę struktury serca, tętnic wieńcowych i otaczających tkanek.96

Rezonans magnetyczny serca (MRI) – wykorzystuje pole magnetyczne i fale radiowe do tworzenia szczegółowych obrazów serca. Jest szczególnie przydatny w ocenie blizn w mięśniu sercowym, które mogą być podłożem zaburzeń rytmu.9615

Badania laboratoryjne

Badania krwi – pozwalają sprawdzić poziom białek (enzymów), które przedostają się do krwiobiegu, gdy serce jest uszkodzone w wyniku zawału. Dodatkowo badania biochemiczne krwi mogą pomóc w wykryciu zaburzeń elektrolitowych (poziom potasu, magnezu, wapnia), które mogą przyczyniać się do wystąpienia migotania komór.110

Badania toksykologiczne – mogą być wykonywane w celu wykrycia substancji toksycznych lub leków, które mogły przyczynić się do wystąpienia migotania komór.4

Badania inwazyjne

Koronarografia (angiogram) – badanie polegające na wprowadzeniu cewnika do tętnicy i podaniu kontrastu, który umożliwia wizualizację tętnic wieńcowych w badaniu rentgenowskim. Pozwala wykryć zwężenia lub niedrożność tętnic wieńcowych, które mogą być przyczyną niedokrwienia mięśnia sercowego i w konsekwencji migotania komór.95

Badanie elektrofizjologiczne (EPS) – inwazyjne badanie, w którym elektrody wprowadzane są do serca przez naczynia krwionośne w celu oceny jego czynności elektrycznej. Może pomóc w identyfikacji obszarów serca, które są źródłem zaburzeń rytmu, i określeniu mechanizmu arytmii.111617

Testy prowokacyjne w diagnostyce idiopatycznego migotania komór

W przypadku podejrzenia idiopatycznego migotania komór (IVF), kiedy nie udaje się zidentyfikować strukturalnej przyczyny arytmii, mogą być wykonywane dodatkowe testy diagnostyczne:1819

  • Test z blokerem kanału sodowego – próba prowokacyjna stosowana do wykrycia ukrytych zespołów arytmogennych, takich jak zespół Brugadów
  • Próba wysiłkowa – test na bieżni lub cykloergometrze, który może ujawnić zaburzenia rytmu wywołane wysiłkiem
  • Test pochyleniowy (Tilt Table Test) – może być stosowany do diagnozy omdleń wazowagalnych

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Badania genetyczne

Badania genetyczne mogą być zalecane u pacjentów z idiopatycznym migotaniem komór, szczególnie gdy istnieje podejrzenie dziedzicznych chorób arytmogennych, takich jak:1821

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Diagnoza różnicowa

W diagnostyce różnicowej migotania komór należy uwzględnić:2324

  • Torsade de pointes – polimorficzny częstoskurcz komorowy charakteryzujący się „skręcaniem” osi elektrycznej serca
  • Częstoskurcz komorowy – szybki rytm pochodzący z komór serca, zwykle z regularnym wzorem w EKG
  • Artefakty elektryczne – mogą naśladować migotanie komór w zapisie EKG, szczególnie podczas resuscytacji lub z powodu powtarzalnej aktywności mięśniowej

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Ocena czynników ryzyka

Po zdiagnozowaniu migotania komór kluczowa jest ocena czynników ryzyka jego wystąpienia, co pomaga w zapobieganiu nawrotom. Najczęstsze przyczyny migotania komór obejmują:2526

242527

Znaczenie szybkiej diagnozy

Migotanie komór jest stanem bezpośredniego zagrożenia życia, wymagającym natychmiastowego rozpoznania i leczenia. Wskaźniki przeżywalności są ściśle związane z czasem, jaki upłynął od wystąpienia VF do defibrylacji. Skuteczność defibrylacji spada o 7-10% z każdą minutą opóźnienia.282930

Przy wczesnej interwencji wskaźniki przeżywalności mogą sięgać 50%. Bez natychmiastowego leczenia, migotanie komór jest nieuchronnie śmiertelne w ciągu kilku minut.282631

Diagnostyka idiopatycznego migotania komór

Idiopatyczne migotanie komór (IVF) to diagnoza wykluczenia, stawiana gdy nie można zidentyfikować podstawowej przyczyny zatrzymania krążenia. Szacuje się, że IVF stanowi 5-10% przypadków migotania komór u osób, które przeżyły pozaszpitalne zatrzymanie krążenia.1819

Diagnostyka IVF obejmuje szeroki zakres badań w celu wykluczenia znanych przyczyn sercowych, oddechowych, metabolicznych i toksykologicznych. Zgodnie z konsensusem ekspertów, diagnoza IVF powinna być stawiana dopiero po przeprowadzeniu kompleksowej oceny, która nie ujawniła żadnej przyczyny strukturalnej ani molekularnej.211932

Warto zauważyć, że częstość diagnozowania IVF zmniejszyła się w ciągu ostatnich czterech dekad dzięki udoskonaleniu technik diagnostycznych, które mogą ujawnić podstawową etiologię strukturalną lub molekularną w przypadkach wcześniej uznawanych za idiopatyczne.2119

Postępowanie po diagnozie migotania komór

Po zdiagnozowaniu migotania komór i stabilizacji stanu pacjenta, konieczne jest wdrożenie strategii zapobiegania nawrotom. Pacjenci, którzy przeżyli epizod migotania komór, mają zwiększone ryzyko ponownego wystąpienia tego zaburzenia.233

Podstawowe metody zapobiegania nawrotom obejmują:3435

  • Wszczepialny kardiowerter-defibrylator (ICD) – urządzenie monitorujące rytm serca i dostarczające impulsy elektryczne w przypadku wykrycia groźnych zaburzeń rytmu
  • Leki antyarytmiczne – mogą pomóc w kontrolowaniu zaburzeń rytmu
  • Leczenie przyczyny podstawowej – np. rewaskularyzacja w przypadku choroby wieńcowej
  • Ablacja przezskórna – w wybranych przypadkach, szczególnie gdy zidentyfikowano ogniska wyzwalające migotanie komór

251836

Znaczenie diagnostyki w rokowaniu

Dokładna diagnostyka migotania komór ma kluczowe znaczenie dla określenia rokowania i ustalenia optymalnej strategii terapeutycznej. Rokowanie pacjentów po epizodzie migotania komór zależy od kilku czynników:2937

  • Czasu od wystąpienia migotania komór do defibrylacji
  • Przyczyny wywołującej migotanie komór
  • Funkcji lewej komory serca po epizodzie
  • Występowania schorzeń współistniejących
  • Skuteczności zastosowanego leczenia w zapobieganiu nawrotom

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W idealnych warunkach, przy szybkiej interwencji, 30-40% pacjentów przeżywa, jednak wielu z nich rozwija trwałe deficyty neurologiczne z powodu niedotlenienia mózgu. Całkowite wyzdrowienie bez następstw neurologicznych jest rzadkie.2937

Nowe kierunki w diagnostyce migotania komór

Badania nad nowymi metodami diagnostycznymi i predykcyjnymi dla migotania komór są w toku. Obiecujące kierunki obejmują:3038

  • Zaawansowane algorytmy przetwarzania sygnału EKG – do wczesnego wykrywania subtelnych zmian elektrycznych poprzedzających VF
  • Sztuczna inteligencja i uczenie maszynowe – do analizy danych EKG i przewidywania ryzyka migotania komór
  • Balistokardiografia (BCG) – nieinwazyjne monitorowanie aktywności mechanicznej serca przy użyciu czujników bezkontaktowych
  • Obrazowanie źródła elektrycznego serca (ECGI) – nieinwazyjna technika mapowania elektrycznej aktywności serca

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Algorytmy wykrywania VF muszą być w stanie dostosować się do różnic międzyosobniczych, aby zapewnić niezawodne wykrywanie. Rozwiązania dostosowane do pacjenta, które obejmują szkolenie modeli na danych specyficznych dla pacjenta, mogą znacznie poprawić dokładność wykrywania.38

Znaczenie badań genetycznych w diagnostyce migotania komór

Badania genetyczne stają się coraz ważniejszym elementem diagnostyki, szczególnie w przypadkach idiopatycznego migotania komór lub gdy podejrzewa się dziedziczne zespoły arytmogenne. Pozwalają one na:2219

  • Identyfikację specyficznych mutacji genetycznych związanych z arytmiami
  • Wczesne wykrywanie osób z grupy ryzyka w rodzinach pacjentów
  • Dostosowanie leczenia do specyficznego podłoża genetycznego
  • Poradnictwo genetyczne dla rodzin pacjentów

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Wnioski

Migotanie komór jest najpoważniejszym zaburzeniem rytmu serca, wymagającym natychmiastowej diagnostyki i leczenia. Wczesne rozpoznanie i defibrylacja są kluczowe dla przeżycia pacjenta. Kompleksowa diagnostyka po epizodzie migotania komór ma zasadnicze znaczenie dla określenia przyczyny, zapobiegania nawrotom i poprawy długoterminowego rokowania.334

Postępy w technikach diagnostycznych, w tym obrazowanie serca, badania elektrofizjologiczne i genetyczne, przyczyniają się do lepszego zrozumienia mechanizmów leżących u podstaw migotania komór i umożliwiają bardziej spersonalizowane podejście do leczenia.3022

Dalsze badania w dziedzinie zaawansowanych algorytmów przetwarzania sygnału EKG, uczenia maszynowego i genomiki mogą prowadzić do rozwoju lepszych narzędzi do wczesnego wykrywania i zapobiegania migotaniu komór, potencjalnie ratując więcej życia w przyszłości.41

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  1. 11.04.2026
  2. www.leksykon.com.pl

Materiały źródłowe

  • #1 Ventricular fibrillation – Diagnosis & treatment – Mayo Clinic
    https://www.mayoclinic.org/diseases-conditions/ventricular-fibrillation/diagnosis-treatment/drc-20364524
    Ventricular fibrillation is always diagnosed in an emergency situation. If sudden cardiac death has occurred, a pulse check will reveal no pulse. […] Tests to diagnose and determine the cause of ventricular fibrillation include: […] Electrocardiogram (ECG or EKG). This quick and painless test measures the electrical activity of the heart. […] An electrocardiogram (ECG) can show if the heart is beating too fast or too slowly. If you’re having an episode of ventricular fibrillation, the ECG usually shows a heartbeat of about 300 to 400 beats a minute. […] Blood tests can be done to check for proteins (enzymes) that leak into the bloodstream when the heart is damaged by a heart attack. […] Chest X-ray. An X-ray image of the chest can show the size and shape of the heart and its blood vessels.
  • #2 Ventricular Fibrillation (V-Fib): Symptoms & Treatment
    https://my.clevelandclinic.org/health/diseases/21878-ventricular-fibrillation
    Ventricular fibrillation (v-fib or VF, for short) is the most common deadly arrhythmia. […] A provider can confirm a ventricular fibrillation rhythm with an electrocardiogram (EKG), especially after resuscitating you from cardiac arrest. […] This condition is a life-threatening medical emergency. Every minute counts. Ventricular fibrillation treatment starts with calling your local emergency number. […] If you survive a ventricular fibrillation rhythm, you’re at a higher risk of it happening again. Your healthcare provider will run tests to find out what caused it and what follow-up options will work best to keep it from happening again. […] Most cases of v-fib start out as another type of ventricular arrhythmia. If you show symptoms of an abnormal heart rhythm in your lower heart chambers, a provider can monitor your rhythms. Finding these issues early can help prevent you from developing ventricular fibrillation.
  • #3 Ventricular Fibrillation: Diagnosis & Treatment
    https://www.massgeneralbrigham.org/en/patient-care/services-and-specialties/heart/conditions/ventricular-fibrillation/treatment
    Ventricular fibrillation (VF) is a life-threatening emergency that requires immediate medical attention. Without treatment, it can cause unconsciousness and death within minutes. Emergency medical personnel work quickly to diagnose ventricular fibrillation and perform life-saving treatments to restore the hearts rhythm. […] Diagnosing ventricular fibrillation (also called VF or v-fib) typically happens after emergency treatment because ventricular fibrillation can strike suddenly and without warning. Since VF is fatal without immediate intervention, providers focus first on terminating or controlling the arrhythmia and restoring the hearts function before diagnosing the source or etiology of VF. […] Once the heart is stabilized, doctors can perform tests to confirm VF and understand its cause. The most common diagnostic tool is an electrocardiogram (EKG or ECG), which uses electrodes placed on the body to analyze the heart’s electrical activity. If ventricular fibrillation is still happening during the test, the EKG will show an abnormally high heart rateoften over 250 beats per minute. For comparison, a normal heart rate is usually between 60-100 beats per minute. […] In addition to the EKG, doctors may also use imaging tests like MRIs, echocardiograms, and other heart monitoring tools to determine the condition of your heart after the event. These tests also help them assess your arrhythmia, determine its cause, and make a treatment plan.
  • #4 Ventricular Fibrillation (Abnormal Rhythm of the Lower Heart Chambers) | Diagnosis | UK Healthcare
    https://ukhealthcare.uky.edu/gill-heart-vascular-institute/conditions/arrhythmias/ventricular-fibrillation/diagnosis
    Ventricular fibrillation is a critical, life-threatening emergency often diagnosed during or after cardiac arrest, as it causes the arrest. […] After a patient has experienced ventricular fibrillation, an electrocardiogram (ECG or EKG) is typically performed as the first step in diagnosis. This test records the electrical activity in the heart through electrodes attached to the body and connected to a machine with wires. In most cases, people with ventricular fibrillation have a heartbeat ranging from 300 to 400 beats per minute. […] These tests can help detect the cause of ventricular fibrillation. Blood tests can also find proteins in the heart that indicate a heart attack has caused damage to the heart muscle. […] During this test, a cardiologist uses catheters to send electrodes to the heart to gauge its electrical activity or stimulate an arrhythmia to discover its origin. […] These tests can determine if harmful substances or drugs are present and could have played a role in the ventricular fibrillation.
  • #5 Ventricular Fibrillation: Symptoms, Causes, Treatment
    https://www.webmd.com/heart-disease/what-is-ventricular-fibrillation
    When you’re resuscitated after ventricular fibrillation, doctors may do several tests to diagnose it and figure out what caused it. […] They include: […] An electrocardiogram measures your heart’s electrical activity. A computer displays the results of electrodes that are attached to your chest and sometimes to your limbs as well. A heartbeat of 300-400 beats a minute indicates you have VFib. […] Your doctor can see the movement of your heart with this test, which uses ultrasound waves to produce an image. […] This imaging test lets your doctor see the shape and size of your heart. It can also show them what your heart’s blood vessels look like. […] Dye is placed into your bloodstream through a tube (catheter) inserted into a blood vessel. The dye allows your doctor to more clearly see your heart arteries in X-rays.
  • #6 Ventricular Fibrillation: Symptoms, Causes, Treatment
    https://www.webmd.com/heart-disease/what-is-ventricular-fibrillation
    A CT scan uses X-rays from several different angles to create detailed cross-section images of your heart. […] This test uses radio waves and a magnetic field to create detailed images of your heart and its blood flow. […] These are done to look for enzymes that show up in the bloodstream when your heart is damaged. […] An EKG readout, or strip, of a VF cardiac rhythm will show irregular, squiggly lines instead of peaks and valleys at steady intervals as you’d see with a healthy heartbeat.
  • #7 Ventricular Fibrillation: Causes & Treatment [ACLS Algorithm]
    https://www.aclsonline.us/rhythms/ventricular-fibrillation/
    Because VF is characterized by a lack of proper rhythm, the patient will have no detectable pulse. Likewise, the ECG readings will not have a P-wave or a QRS complex. Instead, the reading will show smaller, irregular waves that indicate a quivering of the myocardium and lack of ejection. […] When a patient experiences VF, (sudden cardiac arrest), blood supply to the brain and heart stop, and death can happen quickly. That said, treatment for VF focuses on two main stages. […] The first stage of treatment focuses on rapid termination of the VF which often provides an immediate restoration of blood flow to vital organs. Once the patient exhibits return of spontaneous circulation (ROSC), the second stage is about preventing another incident. […] Use of dynamic ECG monitoring to assess the specific rhythm of the patient throughout treatment is mandatory. Both unstable VT and VF are considered shockable rhythms. This means that if the patient exhibits either of these patterns which caused the arrest, immediate electrical countershock is required.
  • #8 Ventricular Fibrillation (VF) • LITFL • ECG Library Diagnosis
    https://litfl.com/ventricular-fibrillation-vf-ecg-library/
    Ventricular fibrillation (VF) is the most important shockable cardiac arrest rhythm. It is invariably fatal unless advanced life support is rapidly instituted. […] Ventricular fibrillation (VF) is the most important shockable cardiac arrest rhythm. […] The ventricles suddenly attempt to contract at rates of up to 500 bpm. This rapid and irregular electrical activity renders the ventricles unable to contract in a synchronised manner, resulting in immediate loss of cardiac output. […] Unless advanced life support is rapidly instituted, this rhythm is invariably fatal. […] Prolonged ventricular fibrillation results in decreasing waveform amplitude, from initial coarse VF to fine VF, ultimately degenerating into asystole due to progressive depletion of myocardial energy stores. […] VF should never be diagnosed from the 12-lead ECG!
  • #9 Ventricular fibrillation – Diagnosis & treatment – Mayo Clinic
    https://www.mayoclinic.org/diseases-conditions/ventricular-fibrillation/diagnosis-treatment/drc-20364524
    Echocardiogram. This noninvasive test uses sound waves to create images of the heart in motion. It can show the heart’s size and structure. […] Coronary catheterization (angiogram). This test helps health care providers see blockages in the heart arteries. […] Cardiac computerized tomography (CT). A computed tomography (CT) scan uses X-rays to create cross-sectional images of specific parts of your body. […] Cardiac magnetic resonance imaging (MRI). This test uses a magnetic field and computer-generated radio waves to create detailed images of blood flow in the heart.
  • #10 Ventricular Fibrillation (V-fib): Diagnosis & Treatment | NewYork-Presbyterian
    https://www.nyp.org/heart/arrhythmias/ventricular-fibrillation-V-fib/treatment
    How is Ventricular Fibrillation Diagnosed? Diagnosis Ventricular fibrillation (V-fib) is an emergency that can occur with little to no warning. […] Tests to confirm V-fib are performed following a persons resuscitation. These may include: […] Electrocardiogram (ECG) – An ECG can measure the electrical activity of the heart, which can help doctors measure the hearts ability to function following an episode of V-fib […] Echocardiogram – A test that uses ultrasound to measure the hearts structure and size […] Blood tests – Can measure enzymes in the blood that leak into the bloodstream following a heart attack.
  • #11 Ventricular Fibrillation | Conditions | UCSF Health
    https://www.ucsfhealth.org/conditions/ventricular-fibrillation
    Ventricular fibrillation is a condition in which the heart’s electrical activity becomes disordered. […] Ventricular fibrillation is life-threatening and requires prompt treatment. […] If your doctor suspects that you may have an arrhythmia, he or she will order one or more of the following diagnostic tests to determine the source of your symptoms. […] The electrocardiogram (ECG or EKG) records the heart’s electrical activity. […] A holter monitor is a small, portable machine that you wear for 24 hours. […] The exercise stress (treadmill) test enables physicians to record your heart’s electrical activity which may not occur at rest. […] An event recorder (loop recorder) is a small portable transtelephonic monitor that may be worn for several weeks. […] Magnetic source imaging (MSI) is used as an overlay to magnetic resonance imaging (MRI).
  • #12 Ventricular Fibrillation Signs & Symptoms | Baptist Health
    https://www.baptisthealth.com/care-services/conditions-treatments/ventricular-fibrllation
    Ventricular fibrillation is a heart rhythm disturbance in which the heart quivers erratically instead of beating as it should. […] Ventricular fibrillation is an emergency condition and signs and symptoms may include: […] There are several diagnostic methods to identify the cause of ventricular fibrillation or to diagnose a related heart arrhythmia. […] We use advanced technology to effectively diagnose, inform treatment and carefully monitor heart conditions. […] Echocardiogram: An ultrasound exam that uses soundwaves to take moving pictures of the hearts chambers and valves. […] Electrocardiogram (EKG): This test measures the electrical activity of the heart and can help determines if parts of the heart are enlarged, overworked or damaged. […] Electrophysiology study: This test records the hearts electrical activities and pathways.
  • #13 Ventricular Fibrillation Signs & Symptoms | Baptist Health
    https://www.baptisthealth.com/care-services/conditions-treatments/ventricular-fibrllation
    Event monitor: This portable EKG device records the heart rate when a button is pressed. […] Holter monitor: This portable EKG device continuously records the hearts rhythms and is worn for 24 to 48 hours during normal activity. […] Implantable loop recorder: This device sits underneath the skin and provides long-term, continuous heart rhythm monitoring. […] Stress testing: This test is conducted during exercise. […] Transtelephonic monitor: This device provides ongoing heart rhythm monitoring that a medical technician can review remotely. […] Because ventricular fibrillation leads to cardiac arrest, it is essential to provide immediate medical intervention. […] After an episode, there is a high risk that ventricular fibrillation will happen again. […] Patients should receive a full evaluation from their physician and appropriate treatment to avoid recurrence.
  • #14 Diagnosis | Stanford Health Care
    https://stanfordhealthcare.org/medical-conditions/blood-heart-circulation/ventricular-arrhythmia/diagnosis.html
    Electrophysiology study: This catheter-based test assesses these serious ventricular arrhythmias by recording your hearts electrical activity from inside the heart. […] Holter and event monitors: Portable EKG monitors record your hearts electrical activity over a longer time to detect intermittent arrhythmias. Holter monitors record continuously for up to 48 hours. Event monitors record abnormal activity over several weeks, but only when it occurs. […] Implantable loop recorder: We implant a tiny device just under the skin on the chest to measure your hearts electrical activity for up to two years.
  • #15 The yield of a comprehensive investigation protocol for the diagnosis of true idiopathic ventricular fibrillation in a real-life clinical setting | Scientific Reports
    https://www.nature.com/articles/s41598-024-64513-7
    Traditionally, aborted cardiac arrest (ACA) due to documented ventricular fibrillation (VF) in the absence of structural heart disease has been termed idiopathic VF. […] The aim of this survey was to assess the yield of an advanced diagnostic work-up to reveal a causative etiology in a real-life clinical setting. […] The diagnostic work-up consisted in cardiac magnetic resonance imaging, stress testing, sodium channel blocker challenge, and genetic testing according to the availability of the method and patient compliance. […] True idiopathic VF was confirmed in 7 patients (15.2%), for whom the entire diagnostic work-up did not reveal any specific pathology. […] Our real-life survey shows that, even with an incomplete diagnostic work-up (due to the unavailability of a particular method or variable patient compliance), a specific diagnosis can be identified in more than one third of the cases of idiopathic VF, which can thus enable targeted treatment and family screening.
  • #16 Ventricular Fibrillation | Conditions | UCSF Health
    https://www.ucsfhealth.org/conditions/ventricular-fibrillation
    Tilt table testing is used to diagnose fainting or black-out spells (vasovagal syncope) by trying to reproduce the black-out episodes. […] The EP study allows doctors to acquire more accurate, detailed information and, in many cases, provide treatment (i.e. catheter ablation) during the same session.
  • #17 Ventricular Fibrillation | Symptoms and Treatment| MedStar Health
    https://www.medstarhealth.org/services/ventricular-fibrillation
    Ventricular fibrillation, also known as VFib, is a serious type of heart rhythm disorder that involves the heart quivering or twitching. The heart can’t pump blood to the rest of the body, which leads to sudden cardiac arrest. […] Emergency tests of your heartbeat and pulse will help first responders and doctors diagnose and treat you. You also may need an electrocardiogram or other tests to determine what caused your condition. […] An electrocardiogram, also known as an ECG, measures the heart’s electrical activity. […] Electrophysiology testing is used to evaluate the cause and location of an abnormal heartbeat (known as an arrhythmia). […] Emergency, lifesaving treatment for ventricular fibrillation includes CPR and defibrillation. Medications can reduce your risk for the condition in the future, as can an implantable cardioverter-defibrillator (ICD) or catheter ablation.
  • #18 Idiopathic Ventricular Fibrillation: Diagnosis, Ablation of Triggers, Gaps in Knowledge, and Future Directions
    https://www.innovationsincrm.com/cardiac-rhythm-management/articles-2020/june/1605-idiopathic-ventricular-fibrillation
    The use of provocation tests to survey for concealed sodium or potassium channel mutation should be considered when no apparent structural or molecular mechanism is identified. […] The recommendation for follow-up testing is crucial for several reasons. […] In a long-term (median: 10.2 years) follow-up study of patients believed to have IVF, a diagnosis potentially explaining the VF was eventually found in 21% of patients. […] In a large meta-analysis of 23 studies including 639 subjects with IVF, the mean age ranged from 33 years to 51 years, and 70% (n = 449) of patients were male. […] Electrophysiologic testing was not predictive of recurrence. […] Two characteristic patterns of IVF can be recognized: sc-Tdp and recurrent paroxysmal primary IVF (PIVF). […] Identifiable PVC-VF triggers are present in a subset of successfully resuscitated patients with IVF, typically when they present with ICD shocks due to recurrent VF hence the term PIVF.
  • #18 Idiopathic Ventricular Fibrillation: Diagnosis, Ablation of Triggers, Gaps in Knowledge, and Future Directions
    https://www.innovationsincrm.com/cardiac-rhythm-management/articles-2020/june/1605-idiopathic-ventricular-fibrillation
    Idiopathic ventricular fibrillation (IVF) is a diagnosis of exclusion made when no underlying cause is identified in a cardiac arrest survivor. […] This article reviews the criteria for diagnosis, patient characteristics, the two primary arrhythmic phenotypes – short-coupled variant of torsades de pointes and recurrent paroxysmal IVF – and the electrophysiologic features, treatment, and ablation of premature ventricular complexes that can trigger IVF. […] IVF accounts for 5% to 10% of survivors of out-of-hospital cardiac arrest. […] Because recurrent VF events are frequent and poorly predictable, placement of an implantable cardioverter-defibrillator (ICD) is considered first-line therapy for patients with IVF. […] In this review, we will discuss the proposed criteria for IVF diagnosis, previous reports of premature ventricular complex (PVC)-triggered IVF (PVC-VF) or short-coupled torsades de pointes (sc-Tdp), diagnostic strategies to identify potential candidate PVC-VF triggers for radiofrequency ablation, and future directions on screening for IVF substrate in SCA survivors.
  • #18 Idiopathic Ventricular Fibrillation: Diagnosis, Ablation of Triggers, Gaps in Knowledge, and Future Directions
    https://www.innovationsincrm.com/cardiac-rhythm-management/articles-2020/june/1605-idiopathic-ventricular-fibrillation
    The prevalence of PVC-IVF triggers in patients with resuscitated VF arrest and ICD shocks due to VF is yet to be determined. […] The identification and ablation of these PVC-VF triggers, when present, can significantly reduce the likelihood of VF recurrence and its associated morbidities such as syncope, ICD shocks, cardiac arrest, and sudden death.
  • #19 Idiopathic Ventricular Fibrillation: Diagnosis, Ablation of Triggers, Gaps in Knowledge, and Future Directions
    https://pmc.ncbi.nlm.nih.gov/articles/PMC7313628/
    The recommendation for follow-up testing is crucial for several reasons. First, patients may develop a clinical phenotype over time. […] The identification and ablation of these PVC-VF triggers, when present, can significantly reduce the likelihood of VF recurrence and its associated morbidities such as syncope, ICD shocks, cardiac arrest, and sudden death.
  • #19 Idiopathic Ventricular Fibrillation: Diagnosis, Ablation of Triggers, Gaps in Knowledge, and Future Directions
    https://pmc.ncbi.nlm.nih.gov/articles/PMC7313628/
    As defined by the Heart Rhythm Society/European Heart Rhythm Association/Asia-Pacific Heart Rhythm Society expert consensus statement on inherited primary arrhythmia syndromes, IVF is a resuscitated cardiac arrest with documentation of VF, in whom known cardiac, respiratory, metabolic, and toxicologic etiologies have been excluded through clinical evaluation. […] The consensus statement acknowledges that the frequency of diagnosis of IVF has declined over the last four decades due to improvements in diagnostic techniques that can unmask an underlying structural or molecular etiology in cases previously considered to be IVF. […] A meticulous inspection of the 12-lead ECG should be done to exclude any pathologic ECG findings including the early-repolarization J-wave syndrome phenotypes or QT syndromes.
  • #19 Idiopathic Ventricular Fibrillation: Diagnosis, Ablation of Triggers, Gaps in Knowledge, and Future Directions
    https://pmc.ncbi.nlm.nih.gov/articles/PMC7313628/
    Idiopathic ventricular fibrillation (IVF) is a diagnosis of exclusion made when no underlying cause is identified in a cardiac arrest survivor. […] This article reviews the criteria for diagnosis, patient characteristics, the two primary arrhythmic phenotypes – short-coupled variant of torsades de pointes and recurrent paroxysmal IVF – and the electrophysiologic features, treatment, and ablation of premature ventricular complexes that can trigger IVF. […] IVF accounts for 5% to 10% of survivors of out-of-hospital cardiac arrest. […] Because recurrent VF events are frequent and poorly predictable, placement of an implantable cardioverter-defibrillator (ICD) is considered first-line therapy for patients with IVF. […] In this review, we will discuss the proposed criteria for IVF diagnosis, previous reports of premature ventricular complex (PVC)-triggered IVF (PVC-VF) or short-coupled torsades de pointes (sc-Tdp), diagnostic strategies to identify potential candidate PVC-VF triggers for radiofrequency ablation, and future directions on screening for IVF substrate in SCA survivors.
  • #20 The yield of a comprehensive investigation protocol for the diagnosis of true idiopathic ventricular fibrillation in a real-life clinical setting | Scientific Reports
    https://www.nature.com/articles/s41598-024-64513-7
    The aim of this survey was to assess the yield of advanced cardiological investigations to reveal a causative etiology in a real-life clinical setting where some investigation modalities are not always available and patient compliance is variable. […] The diagnostic work-up of idiopathic VF was considered complete if 12-lead ECG, coronary angiography, 2D-TTE, exercise stress test and sodium channel blocker challenge were performed or if the particular patient refused a certain step of the protocol. […] Genetic analysis was offered to all patients with a definitive diagnosis of true idiopathic VF (full work-up protocol completed or only stress test or sodium channel blocker challenge missing). […] Our real-life survey shows that even with an incomplete diagnostic work-up (due to unavailability of a particular method or variable patient compliance), a specific diagnosis can be identified in more than one third of the cases of idiopathic VF.
  • #21 Idiopathic Ventricular Fibrillation: Diagnosis, Ablation of Triggers, Gaps in Knowledge, and Future Directions
    https://www.innovationsincrm.com/cardiac-rhythm-management/articles-2020/june/1605-idiopathic-ventricular-fibrillation
    As defined by the Heart Rhythm Society/European Heart Rhythm Association/Asia-Pacific Heart Rhythm Society expert consensus statement on inherited primary arrhythmia syndromes, IVF is a resuscitated cardiac arrest with documentation of VF, in whom known cardiac, respiratory, metabolic, and toxicologic etiologies have been excluded through clinical evaluation. […] The consensus statement acknowledges that the frequency of diagnosis of IVF has declined over the last four decades due to improvements in diagnostic techniques that can unmask an underlying structural or molecular etiology in cases previously considered to be IVF. […] A meticulous inspection of the 12-lead ECG should be done to exclude any pathologic ECG findings including the early-repolarization J-wave syndrome phenotypes or QT syndromes.
  • #22
    https://link.springer.com/article/10.1007/s12471-018-1123-3
    The current population with idiopathic ventricular fibrillation is a rare, heterogeneous group, where diagnostic certainty depends on the extent of workup to exclude other underlying causes. […] Through advances in the understanding of primary electrical syndromes and the discovery of novel founder mutations in idiopathic ventricular fibrillation, subgroups with a specific underlying disease can be identified and diagnosed and managed appropriately, improving prognosis and preventing recurrent events. […] During follow-up, patients will be monitored continuously and undergo diagnostic tests at regular intervals, which will provide valuable insight into natural disease course, specific subgroup identification and disease severity. […] However, many patients with idiopathic ventricular fibrillation show a familial risk for sudden cardiac death and there are several well-characterised populations (e.g. DPP6, SCN5A) in the Netherlands.
  • #22
    https://link.springer.com/article/10.1007/s12471-018-1123-3
    Absence of known arrhythmic substrates in patients with idiopathic ventricular fibrillation provides an opportunity for novel, preferably non-invasive, techniques. […] These results suggest ECGI can play a pivotal role in characterising arrhythmia mechanisms in patients with idiopathic ventricular fibrillation, leading to diagnosis and improved treatment.
  • #23 Ventricular fibrillation – Wikipedia
    https://en.wikipedia.org/wiki/Ventricular_fibrillation
    Ventricular fibrillation results in cardiac arrest with loss of consciousness and no pulse. […] Diagnosis is by an electrocardiogram (ECG) showing irregular unformed QRS complexes without any clear P waves. […] An important differential diagnosis is torsades de pointes. […] Defibrillation is the definitive treatment of ventricular fibrillation, whereby an electrical current is applied to the ventricular mass either directly or externally through pads or paddles, with the aim of depolarising enough of the myocardium for coordinated contractions to occur again. […] The use of this is often dictated around the world by Advanced Cardiac Life Support or Advanced Life Support algorithms, which is taught to medical practitioners including doctors, nurses and paramedics and also advocates the use of drugs, predominantly epinephrine, after every second unsuccessful attempt at defibrillation, as well as cardiopulmonary resuscitation (CPR) between defibrillation attempts.
  • #24 Ventricular Fibrillation Differential Diagnoses
    https://emedicine.medscape.com/article/158712-differential
    In all adult cases, ischemic cardiomyopathy is at the top of the differential diagnosis of causes of ventricular fibrillation (VF). However, dilated cardiomyopathy (DCM) has become increasingly common. […] Occasionally, electrical artifact due to resuscitative efforts or repetitive muscular activity can superficially appear similarly to very coarse VF. However, it is often possible to see the underlying narrower electrocardiographic (ECG) complexes in the putative VF rhythm strip. Accordingly, whenever possible, the ECGs from the reported VF episode should be directly reviewed. […] In children and adolescents, hypertrophic cardiomyopathy (HCM) is most common. VF in these patients often occurs at rest or with mild exertional activity, but vigorous exercise is the trigger in a significant portion of cases.
  • #25 Ventricular Fibrillation – StatPearls – NCBI Bookshelf
    https://www.ncbi.nlm.nih.gov/books/NBK537120/
    VF has been identified in nearly 70% of cardiac arrest patients. Without treatment, the condition is fatal within minutes. The rates of survival for VF patients outside the hospitals have increased slightly but many continue to have residual anoxic brain damage and neurological deficits. […] The most common presentation for VF is sudden collapse from cardiac arrest leading to SCD. This results from improper ventricular contraction resulting in low cardiac output. Patients may demonstrate signs of acute MI such as chest pain, shortness of breath, nausea, and vomiting before the event. Patients with a known history of coronary artery disease or congestive heart failure may show a worsening of chronic symptoms such as angina, dyspnea, orthopnea, paroxysmal nocturnal dyspnea, and pedal edema. At the time of presentation, patients are unconscious, unresponsive, and have no palpable pulse. Without prompt action, this leads to death within the next few minutes.
  • #25 Ventricular Fibrillation – StatPearls – NCBI Bookshelf
    https://www.ncbi.nlm.nih.gov/books/NBK537120/
    Arrhythmias originating from the ventricular myocardium or His-Purkinje system are grouped under ventricular arrhythmia (VA). This includes a subset of arrhythmias such as ventricular tachycardia (VT), ventricular fibrillation (VF), premature ventricular contractions (PVC), and ventricular flutter. Wide complex tachycardia (WCT) is used to define all tachyarrhythmia with QRS complex duration greater than 0.12 seconds. VF is a WCT caused by irregular electrical activity and characterized by a ventricular rate of usually greater than 300 with discrete QRS complexes on the electrocardiogram (ECG). This activity reviews the causes, pathophysiology, and presentation of VF and highlights the role of the interprofessional team in its management. […] VF is an extremely dangerous rhythm significantly compromising cardiac output and ultimately leading to sudden cardiac death (SCD).
  • #25 Ventricular Fibrillation – StatPearls – NCBI Bookshelf
    https://www.ncbi.nlm.nih.gov/books/NBK537120/
    Acute presentation of symptoms and ECG findings lead to the diagnosis. […] Patients surviving VF should have a thorough history and physical examination. A family history of unexplained cardiac death should be noted. […] Due to the high mortality rate and extreme acuity of the condition, VF patients warrant immediate attention. Healthcare professionals should immediately initiate guideline-directed management as per Advanced Cardiac Life Support (ACLS) protocol. […] All patients with cardiac arrest should have an initial assessment while receiving quality CPR. Pulseless VT and VF are both shockable rhythm, and once the staff identifies the rhythm as VF, patients should be shocked immediately with 120 to 200 joules on a biphasic defibrillator or 360 joules using a monophasic. […] Identifying and addressing the cause of inciting event is equally important.
  • #26 Ventricular Fibrillation (VF) | Doctor
    https://patient.info/doctor/ventricular-fibrillation
    Ventricular fibrillation (VF) is a cause of cardiac arrest and sudden cardiac death. The ventricular muscle fibres contract randomly causing a complete failure of ventricular function. Most cases of ventricular fibrillation occur in patients with pre-existing known heart disease (with myocardial fibrosis – scarring – having a role) but the precise nature of the underlying cause of VF is not currently known. […] VF is the most commonly identified arrhythmia in cardiac arrest patients and has been reported as present in 70% of cardiac arrests. The incidence of VF parallels the incidence of ischaemic heart disease, with a peak incidence of VF occurring in people aged 45-75 years. […] When electrocardiogram documentation is available, it often shows that rapid VT precedes VF. […] Patients who survive the initial episode of VF require a full evaluation of left ventricular function, myocardial perfusion and electrophysiological stability.
  • #26 Ventricular Fibrillation (VF) | Doctor
    https://patient.info/doctor/ventricular-fibrillation
    Early defibrillation is essential to improve outcome. […] Prognosis for survivors of VF strongly depends on the time elapsed between onset and medical intervention (prognosis is poor without intervention by 4-6 minutes after onset of VF) as well as on the particular aetiology for the VF. Early defibrillation often makes the difference between long-term disability and functional recovery. If defibrillation is delivered promptly, survival rates as high as 75% have been reported. […] After resuscitation, the prognosis is largely dependent on haemodynamic stability, early neurological recovery and duration of the resuscitation.
  • #27 Ventricular Arrhythmia: Causes, Symptoms & Treatment
    https://my.clevelandclinic.org/health/diseases/21854-ventricular-arrhythmia
    Ventricular fibrillation often shortened to v-fib happens when the lower chambers of the heart quiver or twitch rather than expand and contract. Because the ventricles dont fully expand and contract, blood doesnt get pumped through them. This causes your heart to stop, sending you into sudden cardiac arrest, and lack of blood flow to your brain causes you to pass out within seconds. If blood flow isnt restarted within a few minutes, this condition is deadly. […] Ventricular fibrillation causes include: Blunt impacts to the chest (especially from small, fast-moving objects like a baseball). […] The main diagnostic test for ventricular arrhythmias is electrocardiography (often abbreviated as ECG or EKG). This test uses multiple sensors, called electrodes, which are placed on your chest. The electrodes detect your hearts electrical activity either while youre resting or exercising and display it as a wave pattern.
  • #28 Ventricular Fibrillation (V-Fib): Symptoms & Treatment
    https://my.clevelandclinic.org/health/diseases/21878-ventricular-fibrillation
    Your outlook with ventricular fibrillation depends on how quickly someone helps you. With quick treatment, up to 50% of people can survive. Without immediate treatment, a ventricular fibrillation rhythm is fatal. For each minute you wait for defibrillation, your chance of survival drops by 7% to 10%.
  • #29 Ventricular Fibrillation – StatPearls – NCBI Bookshelf
    https://www.ncbi.nlm.nih.gov/books/NBK537120/
    Prognosis of VF depends on the time from onset to early intervention and defibrillation. Shorter delays are associated with survival rates as high as 50%. […] Even under ideal circumstances, 30-40% of patients survive but many also develop residual neurological deficits because of anoxia. Full recovery is rare.
  • #30 Ventricular Fibrillation Prediction and Detection: A Comprehensive Review of Modern Techniques
    https://www.mdpi.com/2076-3417/14/23/11167
    Early and accurate detection of VF is essential to increase the patient’s chances of survival. Studies show that for every minute of delay in defibrillation, the chances of survival decrease by about 10%. In this context, the development and implementation of advanced ECG signal processing methods for rapid and accurate detection of VF are of critical importance. […] Diagnosis of ventricular fibrillation based on ECG is crucial for immediate intervention, such as defibrillation, which can restore normal heart rhythm and save the patient’s life. Modern ECG signal processing techniques, through advanced algorithms and artificial intelligence, play a vital role in the prompt and accurate detection of these peculiarities, facilitating quick and effective interventions in cardiac emergencies.
  • #30 Ventricular Fibrillation Prediction and Detection: A Comprehensive Review of Modern Techniques
    https://www.mdpi.com/2076-3417/14/23/11167
    This review offers a detailed examination of modern ECG signal processing techniques employed in the prediction and detection of ventricular fibrillation (VF). It contains a thorough analysis of recent advancements in the field, exploring the strengths, limitations, and real-world applications of these techniques. By evaluating the current state of research, the review seeks to identify the most effective approaches and highlight key areas where further investigation is needed, ultimately guiding future research efforts toward improving VF prediction and detection. Overall, AI has shown significant potential in a range of VF-related tasks. However, real-world implementation encounters several challenges, including difficulties in accurately interpreting ECG signals, the variability in individual physiological responses, and the infrequency of ventricular fibrillation events.
  • #31 Ventricular Fibrillation: Background, Pathophysiology, Etiology
    https://emedicine.medscape.com/article/158712-overview
    In hospital settings, VF is treated using Advanced Cardiac Life Support (ACLS) protocols. Long-term management may be accomplished with medical therapy or placement of an implantable cardioverter-defibrillator (ICD). Surgical correction of underlying disorders (eg, percutaneous coronary intervention, coronary artery bypass surgery) may also be indicated. […] On the electrocardiogram (ECG), VF manifests as a chaotically irregular pattern. This pattern is coarse initially but becomes finer as ventricular disorganization increases. As the ECG waveform flattens, the likelihood of successful defibrillation decreases. […] The chances of survival from an index ventricular fibrillation (VF) event depend on bystander cardiopulmonary resuscitation (CPR), rapid availability or arrival of personnel and apparatus for defibrillation and advanced life support, and transport to a hospital. Although patients with nontraumatic cardiac arrest are more likely to be successfully resuscitated from VF than from any other arrhythmia, success is highly time dependent. The probability of success generally declines at a rate of 2%-10% per minute.
  • #32 Idiopathic Ventricular Fibrillation | Thoracic Key
    https://thoracickey.com/idiopathic-ventricular-fibrillation/
    Ventricular fibrillation in patients without structural heart disease is rare. Ninety to ninety-five percent of individuals with ventricular fibrillation reveal underlying structural heart disease. No structural heart disease can be identified in only 5% to 10% of patients. […] The diagnosis of IVF is based on the exclusion of currently known structural and primary electrical heart diseases following a complete noninvasive, invasive, and genetic workup. […] The diagnosis of IVF can be established only if structural and electrical cardiac abnormalities have been excluded. Thus, a complete systematic cardiologic workup is mandatory. […] Blood tests are needed for exclusion of electrolyte imbalance or drug intoxications triggering ventricular tachyarrhythmias. […] Recently, a new entity has been described: sudden unexpected death in epilepsy (SUDEP). Patients with epilepsy can die suddenly in the absence of structural heart disease with or without the evidence of seizure. The mechanism of SUDEP is not fully understood. Cardiac arrhythmias, postictal cardiomyopathy, seizure-related respiratory failure, and alternated autonomic function are discussed in literature. Ventricular fibrillation might be one specific cause in SUDEP. Specific mutations in genes encoding also for channelopathies like Brugada syndrome and long QT syndrome have been identified in SUDEP.
  • #33 Ventricular Fibrillation – Heart and Blood Vessel Disorders – Merck Manual Consumer Version
    https://www.merckmanuals.com/home/heart-and-blood-vessel-disorders/abnormal-heart-rhythms/ventricular-fibrillation
    Ventricular fibrillation is a potentially fatal, uncoordinated series of very rapid, ineffective contractions of the ventricles (lower chambers of the heart) caused by many chaotic electrical impulses. […] Electrocardiography helps determine if the cause of cardiac arrest is ventricular fibrillation. […] Ventricular fibrillation is diagnosed as the cause of the cardiac arrest by electrocardiography (ECG). […] Ventricular fibrillation must be treated as an extreme emergency. Cardiopulmonary resuscitation (CPR) must be started as soon as possible. It must be followed by defibrillation (an electrical shock delivered to the chest), as soon as the defibrillator is available. […] People who are successfully resuscitated from ventricular fibrillation and survive are at high risk of another episode. If ventricular fibrillation is caused by a reversible disorder, that disorder is treated. Otherwise, most people have an implantable cardioverter-defibrillator (ICD) surgically implanted to give a shock to treat the fibrillation if it recurs.
  • #34 Ventricular fibrillation – Symptoms & causes – Mayo Clinic
    https://www.mayoclinic.org/diseases-conditions/ventricular-fibrillation/symptoms-causes/syc-20364523
    Ventricular fibrillation is an emergency that requires immediate medical attention. It’s the most frequent cause of sudden cardiac death. […] Emergency treatment for ventricular fibrillation includes cardiopulmonary resuscitation (CPR) and shocks to the heart with a device called an automated external defibrillator (AED). Medications, implanted devices or surgery may be recommended to prevent episodes of ventricular fibrillation. […] Make an appointment with a heart doctor (cardiologist) if you have an unexplained fast or pounding heartbeat. […] Without immediate treatment, ventricular fibrillation can cause death within minutes. The condition’s rapid, erratic heartbeats cause the heart to abruptly stop pumping blood to the body. Blood pressure drops suddenly and significantly. The longer the body lacks blood, the greater the risk of damage to the brain and other organs. […] Ventricular fibrillation is the most frequent cause of sudden cardiac death. The risk of other long-term complications depends on how fast treatment is received.
  • #35 Ventricular Fibrillation | American Heart Association
    https://www.heart.org/en/health-topics/arrhythmia/about-arrhythmia/ventricular-fibrillation
    Ventricular fibrillation, or VF, is considered the most serious abnormal heart rhythm. VF is extremely dangerous and can lead to sudden cardiac death. Without treatment, the condition is fatal within minutes. […] Ventricular fibrillation can cause sudden cardiac arrest, which requires immediate medical attention. Signs of cardiac arrest include: Loss of consciousness, Not breathing or only gasping for breath, Sudden collapse, No pulse. […] If you suspect someone is having cardiac arrest, it’s vital to respond appropriately and quickly. Call 911, give CPR and use an automated external defibrillator (AED) if one is available. […] If you’re at risk for ventricular fibrillation, your health care professional may recommend: Arrhythmia medications, which help control rhythm problems, An implantable cardioverter defibrillator (ICD), which detects and corrects abnormal heart rhythms by sending a shock to the heart.
  • #36 Ventricular Fibrillation Signs & Symptoms | Baptist Health
    https://www.baptisthealth.com/care-services/conditions-treatments/ventricular-fibrllation
    Certain anti-arrhythmic medications can be used for emergency treatment of ventricular fibrillation or to prevent it from happening in the future. […] These medications help manage heart arrhythmia by suppressing abnormal electrical activity in the heart tissue. […] There are a variety of therapeutic devices and procedures used to treat ventricular fibrillation, including: […] Defibrillation: Delivery of an electric shock through the chest wall to the heart to momentarily stop the heart and the chaotic rhythm. […] Implantable cardioverter-defibrillator (ICD): This device can monitor heart rhythm and produce electrical shocks, when needed, to control rapid and abnormal heart beats. […] Pacemaker: This device can be implanted during minor surgery to help the right and left ventricle contract normally. […] Ventricular fibrillation is a severe heart rhythm abnormality that can lead to cardiac arrest and sudden cardiac death.
  • #37 Ventricular fibrillation: MedlinePlus Medical EncyclopediaLock
    https://medlineplus.gov/ency/article/007200.htm
    Ventricular fibrillation (VF) is a severely abnormal heart rhythm (arrhythmia) that is life threatening. […] A cardiac monitor will show a very disorganized („chaotic”) heart rhythm. […] Tests will be done to look for the cause of the VF. […] VF is a medical emergency. It must be treated immediately to save a person’s life. […] VF is treated by delivering a quick electric shock through the chest. It is done using a device called an external defibrillator. The electric shock can immediately restore the heartbeat to a normal rhythm, and should be done as quickly as possible. […] An implantable cardioverter defibrillator (ICD) is a device that can be implanted in the chest wall of people who are at risk for this serious rhythm disorder. The ICD detects the dangerous heart rhythm and quickly sends a shock to correct it. […] VF will lead to death within a few minutes unless it is treated quickly and properly. Even then, long-term survival for people who live through a VF attack outside of the hospital is low. […] People who have survived VF may be in a coma or have long-term brain or other organ damage.
  • #38 Ventricular Fibrillation Prediction and Detection: A Comprehensive Review of Modern Techniques
    https://www.mdpi.com/2076-3417/14/23/11167
    The study [8] showed that inter-patient variability can affect the performance of VF detection algorithms. Algorithms must be able to adapt to these differences to ensure reliable detection. Customized solutions, which involve training models on patient-specific data, could significantly improve detection accuracy. […] The practical implementation of VF detection algorithms in continuous monitoring and telemedicine systems is another challenge. These systems require reliable solutions that can monitor patients long-term and transmit real-time data to medical monitoring centers. […] The paper aims to provide a comprehensive review of modern ECG signal processing methods used for ventricular fibrillation detection. The main aim is to present and analyze recent techniques in the field, highlighting their advantages, limitations, and practical applications.
  • #39 Detection of Ventricular Fibrillation Based on Ballistocardiography by Constructing an Effective Feature Set
    https://www.mdpi.com/1424-8220/21/10/3524
    Ventricular fibrillation (VF) is a type of fatal arrhythmia that can cause sudden death within minutes. The study of a VF detection algorithm has important clinical significance. This study aimed to develop an algorithm for the automatic detection of VF based on the acquisition of cardiac mechanical activity-related signals, namely ballistocardiography (BCG), by non-contact sensors. […] The results showed that the sensitivity and specificity were 0.965 and 0.958 under 10-fold cross-validation, and they were 0.947 and 0.946 under leave-one-subject-out cross-validation. In conclusion, the proposed algorithm combining feature extraction and machine learning can effectively detect VF in BCG, laying a foundation for the development of long-term self-cardiac monitoring at home and a VF real-time detection and alarm system.
  • #40 Ventricular Fibrillation Prediction and Detection: A Comprehensive Review of Modern Techniques
    https://www.mdpi.com/2076-3417/14/23/11167
    Recent advances in ECG signal processing, fueled by machine learning and advanced mathematical transformations, have led to significant improvements in the detection of ventricular fibrillation. These techniques offer high accuracy and efficiency, with the potential to transform clinical practice and save lives through rapid and accurate interventions. […] The Kalman filter is a recursive algorithm used to estimate the state of a system from a series of noisy measurements. It is particularly useful in the real-time processing of ECG signals due to its ability to follow the dynamics of the signal and improve its quality by removing noise. […] The discrete wavelet transform (DWT) is used to decompose the ECG signal into different levels of resolution, allowing detailed analysis of its characteristics.
  • #41 Ventricular Fibrillation Prediction and Detection: A Comprehensive Review of Modern Techniques
    https://www.mdpi.com/2076-3417/14/23/11167
    In conclusion, wavelet transform techniques, such as DWT and CWT, provide powerful methods for multiresolution analysis of the ECG signal, essential for the detection and prediction of ventricular fibrillation. […] The experimental results demonstrate the effectiveness and practical applicability of various machine learning techniques and neural networks in the detection and prediction of ventricular fibrillation. […] The integration of VF detection algorithms in portable ECG monitoring devices is a growing field, with multiple proposals presented in the works in the field in recent years.

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