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• #1 Ventricular Tachycardia: Causes, Symptoms, and Diagnosis

  https://www.healthline.com/health/ventricular-tachycardia

  Ventricular tachycardia (v-tach or VT) is a very fast heart rhythm that begins in the ventricles. The condition most commonly affects people who have heart disorders, such as coronary artery disease and cardiomyopathy. […] Its caused by a malfunction in the hearts electrical system. […] The exact cause of ventricular tachycardia isnt always known. In most cases, its triggered by another heart condition. […] Known causes of ventricular tachycardia include: Cardiomyopathy. This is a type of heart disease that weakens the heart muscle. Structural heart disease. This form of heart disease may be caused by damage from a previous heart attack or infection, or may result from a heart abnormality present at birth. Ischemic heart disease. This heart disease is caused by narrow heart arteries limiting blood flow to the heart, often due to buildup of plaque. It can also be called coronary heart disease. Heart failure. Heart failure occurs when the heart is too weak to pump enough blood. Myocarditis. Myocarditis happens when the heart muscle is inflamed, most often due to an infection. Long QT syndrome. This condition affects the hearts normal electrical activity and can either be inherited or acquired. Congenital coronary artery anomalies. This is a rare condition you can be born with where the coronary artery is in an abnormal location. Electrolyte abnormalities. Imbalances in electrolytes, such as magnesium or potassium, in your body may cause ventricular tachycardia. Acid-base abnormalities. Acid-base abnormalities may occur if your blood pH is too acidic or not acidic enough, or too alkaline or not alkaline enough. […] In rare cases, ventricular tachycardia can be caused by certain medications, excessive caffeine or alcohol consumption, or intense exercise.

• #2 Ventricular Tachycardia: Symptoms, Causes, Diagnosis, Treatment

  https://www.webmd.com/heart-disease/atrial-fibrillation/what-is-ventricular-tachycardia

  Ventricular tachycardia happens when theres a glitch in your hearts electrical system. These abnormal signals trigger the fast rhythm in your ventricles that revs up your heart rate. […] Conditions that can cause problems with the signals in your heart that lead to ventricular tachycardia or raise your chances of it also include: Prior heart attack, Heart failure, Weak heart muscle (cardiomyopathy), Conditions that scar your heart (sarcoidosis), Blood flow issues from heart disease, Electrolyte imbalance, especially abnormal levels of potassium and magnesium, Inflammation of your heart muscle (myocarditis), Sarcoidosis, a condition that causes inflamed tissues to grow in your body, Conditions that change the pH in your cells (acidosis), Stimulants like cocaine or methamphetamine, Heavy alcohol use or caffeine, Recreational drugs, Certain medications. […] When doctors cant find a cause, its called idiopathic ventricular tachycardia.

• #3 Ventricular Tachycardia Causes, Symptoms and Treatments – UChicago Medicine

  https://www.uchicagomedicine.org/conditions-services/heart-vascular/ventricular-tachycardia

  Ventricular tachycardia does not have one definitive cause, but there are several pre-existing heart conditions that can result in scar tissue developing on the heart, which leads to abnormal electrical signals. […] Common sources of VT include: Prior Heart attack, Cardiomyopathy (weak heart muscle), Heart valve disease, Arrhythmogenic RV cardiomyopathy, Inflammatory myocarditis (viral, sarcoidosis), Inherited or congenital heart disease (tetralogy of Fallot). […] Knowing more about your heart health and family history of heart disease is a crucial first step in preventing further damage to your heart and minimizing your risk for VT.

• #4 Ventricular Tachycardia and Sudden Cardiac Death

  https://pmc.ncbi.nlm.nih.gov/articles/PMC2664600/

  Ventricular tachycardia (VT), which most commonly occurs in patients with structural heart disease, can be associated with an increased risk of sudden death. […] The most common cause of ventricular fibrillation is acute coronary ischemia, whereas a myocardial scar from prior infarct is the most common cause of sustained monomorphic VT in patients with structural heart disease. […] Ischemic heart disease is the most common cause of sustained ventricular arrhythmias. […] Acute coronary ischemia is a cause of polymorphic VT or ventricular fibrillation (VF) and is probably the most common cause of out-of-hospital sudden death. […] Sustained monomorphic VT that is due to structural heart disease is most commonly a result of reentry involving a region of myocardial scar. […] The most common cause of a scar is an old infarct.

• #5 Ventricular Tachycardia (V-tach): Symptoms & Causes | NewYork-Presbyterian

  https://www.nyp.org/heart/arrhythmias/ventricular-tachycardia-v-tach

  Ventricular tachycardia (VT or V-tach) is a fast, irregular heart rhythm caused by abnormal electrical signals in the ventricles, the heart’s lower chambers. […] The exact cause of ventricular tachycardia may not be known. Certain heart diseases and other factors may lead to the development of V-tach, including: […] Structural heart disease – V-tach is developed after a disease damages the heart muscle and creates scar tissue that causes abnormal electrical pathways in the ventricles. Heart diseases that can damage the heart include heart attack, cardiomyopathy, heart failure, myocarditis, and heart valve disease. […] Certain genetic conditions, for instance, catecholaminergic polymorphic ventricular tachycardia (CPVT) is a genetic (inherited) condition that can trigger V-tach. […] Electrolyte disorders are caused by a significant loss of body fluids due to vomiting, diarrhea, or sweating. […] Any condition that strains the heart or damages heart tissue can increase the risk of ventricular tachycardia.

• #6 Ventricular tachycardia: MedlinePlus Medical EncyclopediaLock

  https://medlineplus.gov/ency/article/000187.htm

  Ventricular tachycardia (VT) is a rapid heartbeat that starts in the lower chambers of the heart (ventricles). […] The condition can develop as an early or late complication of a heart attack. It may also occur in people with: Cardiomyopathy, Heart failure (also called congestive heart failure), Heart surgery, Myocarditis, Valvular heart disease. […] Scar tissue may form in the muscle of the ventricles days, months, or years after a heart attack. This can lead to ventricular tachycardia. […] VT can also be caused by: Anti-arrhythmic drugs (used to treat an abnormal heart rhythm), Changes in blood chemistry (such as a low potassium level), Changes in blood pH (acid-base), Lack of enough oxygen. […] „Torsade de pointes” is a specific form of VT. It is often due to congenital heart disease or the use of certain medicines.

• #7 Ventricular Tachycardia: Causes, Symptoms, and Treatment

  https://avicennacardiology.com/blog/ventricular-tachycardia/

  Ventricular tachycardia can develop due to a wide range of underlying causes. The most common include: […] Coronary Artery Disease (CAD): Ischemic heart disease, often caused by coronary heart disease, is a primary trigger for VT. In patients with CAD, narrowed arteries reduce blood flow to the heart muscle, causing myocardial ischemia and arrhythmias. […] Heart Attack (Myocardial Infarction): A previous myocardial infarction often leaves behind scar tissue, disrupting the hearts electrical signals and causing recurrent ventricular tachycardia. […] Heart Failure: Patients with congestive heart failure or left ventricular dysfunction are at a higher risk of developing VT due to weakened heart function. […] Hypertrophic Cardiomyopathy: In this condition, the heart muscle becomes abnormally thickened, which can lead to ventricular tachycardia.

• #8 Causes, symptoms and treatment for ventricular tachycardia | Norton Healthcare

  https://nortonhealthcare.com/services-and-conditions/heart-and-vascular-care/services/ventricular-tachycardia/

  Heart failure develops when the heart, for some reason, isn’t pumping enough blood or isn’t pumping fast enough to keep up with the body’s needs. It doesn’t mean the heart stops, like cardiac arrest. The heart isn’t able to do its job well enough. A symptom of heart failure is sometimes V-tach. V-tach can lead to sudden cardiac arrest.

• #8 Causes, symptoms and treatment for ventricular tachycardia | Norton Healthcare

  https://nortonhealthcare.com/services-and-conditions/heart-and-vascular-care/services/ventricular-tachycardia/

  V-tach is when the electrical signals in your heart are not working as they should. V-tach causes include: […] Having a heart attack or other heart condition that caused scarring of heart tissue (structural heart disease). There are several conditions that fall in this category including myocarditis (inflammation around the heart), cardiomyopathy and heart valve disease […] Poor blood flow to the heart muscle due to coronary artery disease […] Congenital heart diseases, which means a heart condition you are born with […] Imbalance of electrolytes, which are substances that help the heart’s electrical system work — such as potassium, sodium, calcium and magnesium […] Side effects of medication […] Use of stimulants such as cocaine or methamphetamine […] Sometimes, there is no known cause for V-tach. This is called idiopathic (id-ee-oh-PATH-ick) V-tach. That means there is no obvious reason for the irregular heartbeat – you haven’t had any of the conditions listed above, there is no scarring, etc.

• #9

  https://continentalhospitals.com/diseases/ventricular-tachycardia/

  Heart Failure: Chronic heart failure, which occurs when the heart is unable to pump blood effectively, can result in electrical remodeling of the heart tissue, increasing the risk of arrhythmias such as VT. […] Drug Toxicity: Certain medications, particularly those that affect the heart’s electrical conduction system (such as antiarrhythmic drugs), can increase the risk of VT, especially if taken in excessive doses or in combination with other drugs. […] Stimulant Use: The use of stimulant drugs such as cocaine or amphetamines can increase heart rate and blood pressure, potentially triggering VT, particularly in individuals with underlying heart disease. […] Idiopathic VT: In some cases, the exact cause of VT may not be identified, and it may occur spontaneously without an apparent underlying cardiac abnormality. […] The causes of ventricular tachycardia can vary, including underlying heart conditions such as coronary artery disease or cardiomyopathy. Other factors like electrolyte imbalances, drug toxicity, or previous heart surgeries may also contribute to its development.

• #10 Ventricular Tachycardia – Health Information Library | PeaceHealth

  https://www.peacehealth.org/medical-topics/id/te7875spec

  Ventricular tachycardia (VT) is a type of fast heart rhythm that starts in the lower part of the heart (ventricles). The heart beats more than 100 beats per minute. […] Sometimes it’s not known what causes VT. But in most cases, it’s caused by heart disease. This includes having a previous heart attack or congenital heart disease. It also includes hypertrophic cardiomyopathy, dilated cardiomyopathy, and myocarditis. Sometimes VT occurs after heart surgery. Inherited heart rhythm problems can also cause VT. These include long QT syndrome and Brugada syndrome. […] Some medicines can cause VT. These include antiarrhythmic medicines, other heart medicines, and antibiotics. Less common causes include blood imbalances. Examples are low potassium levels and other electrolyte imbalances. […] Herbal remedies that contain ephedra, also known as ma huang, can trigger VT. Drugs (such as stimulants, like cocaine) also may cause it.

• #11 Ventricular tachycardia | Radiology Reference Article | Radiopaedia.org

  https://radiopaedia.org/articles/ventricular-tachycardia?lang=us

  Ventricular tachycardia is the major cause of sudden cardiac death with an estimated rate of 300,000 deaths each year in the United States. Risk factors of ventricular tachycardia include hypertension, valvular disease, coronary artery disease, and cardiomyopathy. […] The vast majority of patients with ventricular tachycardia have significant underlying heart disease. The damaged, fibrotic myocardium can alter electrical pathways to the ventricles. […] Some of the common causes of ventricular tachycardia include myocarditis, ischemic heart disease, hypertrophic cardiomyopathy, right ventricular cardiomyopathy, congenital heart disease, valvular heart disease, long QT syndrome, myocardial infarction, and metabolic/electrolyte abnormalities.

• #12 Ventricular Tachycardia and Sudden Cardiac Death

  https://pmc.ncbi.nlm.nih.gov/articles/PMC2664600/

  In patients with Brugada syndrome, incomplete right bundle branch block and ST-segment elevation in the anterior precordial leads is evident on ECG. […] A genetic defect causing abnormal sodium channel function causes approximately a quarter of cases. […] Syncope and sudden death result from polymorphic VT, tend to occur during sleep, and can be precipitated by fever. […] Catecholaminergic polymorphic VT is an inherited disorder in which abnormal calcium processing causes exercise-induced polymorphic VT. […] Arrhythmogenic right ventricular dysplasia (ARVD) is an inherited disorder that may present with monomorphic VT or polymorphic VT. […] It is associated with fibrofatty replacement of the right ventricle, leading to abnormal right ventricular function and abnormal structural appearance on cardiac imaging; however, the involvement can be patchy and difficult to detect.

• #13 Ventricular Tachycardia: Causes, Symptoms, and Treatment

  https://avicennacardiology.com/blog/ventricular-tachycardia/

  Arrhythmogenic Right Ventricular Cardiomyopathy: This inherited disorder affects the right ventricle, making the heart more prone to developing VT or other cardiac arrhythmias. […] Structural Heart Disease: VT often occurs in individuals with underlying structural heart disease, such as heart valve disease or ventricular dysplasia. […] Genetic Conditions: Certain genetic disorders, such as long QT syndrome and Brugada syndrome, increase the risk of ventricular tachycardia and sudden cardiac deaths. […] Electrolyte Imbalances: Low levels of potassium or magnesium in the body can lead to abnormal electrical activity in the heart, increasing the likelihood of abnormal heart rhythms.

• #14 Tachycardia: Fast Heart Rate | American Heart Association

  https://www.heart.org/en/health-topics/arrhythmia/about-arrhythmia/tachycardia–fast-heart-rate

  Ventricular tachycardia (VT) is a fast heart rate that starts in the heart’s lower chambers (ventricles). Electrical signals in the heart’s lower chambers fire abnormally fast. This interferes with electrical impulses coming from the sinus node, the heart’s natural pacemaker. […] Ventricular tachycardia is most often associated with disorders that interfere with the heart’s electrical conduction system. These disorders can include: […] Lack of coronary artery blood flow, depriving oxygen to heart tissue […] Cardiomyopathy distorting the heart’s structure […] Medication side effects […] Use of illegal drugs such as cocaine or methamphetamine […] Sarcoidosis (an inflammatory disease affecting skin or body tissues) […] Abnormalities of the heart that result in scarring of heart tissue (sometimes called “structural heart disease”); the most common cause is a prior heart attack […] Congenital heart conditions, including long QT syndrome […] Imbalance of electrolytes needed for conducting electrical impulses.

• #15 Ventricular Tachycardia and Sudden Cardiac Death

  https://pmc.ncbi.nlm.nih.gov/articles/PMC2664600/

  Ventricular scars leading to reentrant VT also occur in nonischemic cardiomyopathies, including idiopathic dilated cardiomyopathy, hypertrophic cardiomyopathy, infiltrative heart disease (eg, sarcoidosis), right ventricular dysplasia, and after repair of congenital heart disease or valvular heart disease. […] A number of genetic conditions cause polymorphic ventricular arrhythmias and sudden death in the absence of visible structural heart disease. […] Most of these disorders are ion channel abnormalities. […] Long QT syndrome results most often from abnormalities of either potassium or sodium ion channels and typically manifests as a prolonged QT interval on the surface ECG. […] Syncope and sudden death result from polymorphic VT that often has waxing and waning QRS amplitude known as torsades de pointes.

• #16 Ventricular Tachycardia: Practice Essentials, Background, Pathophysiology

  https://emedicine.medscape.com/article/159075-overview

  Causes of ventricular tachycardia (VT) include the following: Ischemic heart disease (most common), structural heart disease with disruption of normal conduction patterns (eg, nonischemic cardiomyopathy, arrhythmogenic right ventricular cardiomyopathy [ARVD] or cardiomyopathy, hypertrophic cardiomyopathy), congenital structural cardiac disorders (eg, tetralogy of Fallot) and associated surgical scar, acquired channelopathies, most commonly from drugs that prolong the QT interval (eg, class IA and class III antiarrhythmics, phenothiazines, methadone, many others); drugs that slow myocardial conduction (eg, flecainide, propafenone, halothane) may also promote reentrant VT, inherited channelopathies (eg, long QT syndrome, short QT syndrome, Brugada syndrome, and catecholaminergic polymorphic ventricular tachycardia), electrolyte imbalances (eg, hypokalemia, hypocalcemia, hypomagnesemia), sympathomimetic agents, including intravenous (IV) inotropes and illicit drugs such as methamphetamine or cocaine, digitalis toxicity, which can lead to biventricular tachycardia, systemic diseases causing infiltrative cardiomyopathy or scar (eg, sarcoidosis, amyloidosis, systemic lupus erythematosus, hemochromatosis, rheumatoid arthritis), exposure to extreme heat and humidity appears to raise the risk for VT/VF in the setting of preexisting cardiovascular disease.

• #17 Ventricular Tachycardia: Practice Essentials, Background, Pathophysiology

  https://emedicine.medscape.com/article/159075-overview

  Hypokalemia is an important arrhythmia trigger, followed by hypomagnesemia. Hyperkalemia may also predispose to VT and ventricular fibrillation (VF), particularly in patients with structural heart disease. Other triggers include sleep apnea and atrial fibrillation (AF), which can increase VT risk in patients with preexisting structural heart disease. […] QT prolongation, which may be acquired or inherited, can lead to VT. Acquired QT prolongation is observed with certain potassium channel-blocking medications. Most of the causative drugs block the delayed rectifier cardiac potassium current, IKr. These agents include class IA and class III antiarrhythmics, azithromycin, and many others. Congenital long QT syndrome is a group of genetic disorders involving abnormal cardiac ion channels (most commonly, potassium channels responsible for ventricular repolarization). […] In both acquired and congenital long QT syndromes, prolonged repolarization predisposes to torsade de pointes, a reentrant rhythm with a constantly varying circuit. Other inherited ion channel abnormalities may cause idiopathic VF and familial polymorphic VT in the absence of QT prolongation.

• #18 Quick Facts:Ventricular Tachycardia – Merck Manual Consumer Version

  https://www.merckmanuals.com/home/quick-facts-heart-and-blood-vessel-disorders/abnormal-heart-rhythms/ventricular-tachycardia

  Ventricular tachycardia happens when some of the cells in your ventricle start acting like pacemaker cells. If they go faster than your normal pacemaker cells, they can take over your heart and make it beat very fast. […] Sustained ventricular tachycardia usually happens in older adults with heart problems, such as a heart attack. […] Other causes may include long QT syndrome (an abnormal electrical circuit that may trigger a sudden ventricular tachycardia or even more dangerous rhythms when you exercise or feel stressed), certain medicines, and Brugada syndrome (an inherited heart condition that increases the risk of ventricular tachycardia and other arrhythmias).

• #19 Catecholaminergic Polymorphic Ventricular Tachycardia (CPVT) | Boston Children’s Hospital

  https://www.childrenshospital.org/conditions/catecholaminergic-polymorphic-ventricular-tachycardia

  CPVT is caused by a change in the genetic code for a particular cardiac protein that causes it to leak calcium into the heart. The extra calcium affects the hearts electrical system, causing extra heartbeats from the lower chambers of the heart. […] CPVT is a rare disorder that affects about one in 10,000 people. Left untreated, CPVT may cause the heart to stop beating.

• #20 Ventricular Tachycardia Treatment in Delhi, India | Symptoms & Causes

  https://www.blkmaxhospital.com/our-specialities/heart-centre/conditions-treatments/ventricular-tachycardia

  Ventricular tachycardia is due to faulty conduction of the electrical signals. The following conditions can affect the electrical signal conduction: […] Structural heart disease: Scarring of the cardiac tissue caused by a previous heart attack or other cardiac conditions. […] Poor blood flow: Reduced supply of the blood to the cardiac tissue, as in case of coronary artery disease. […] Electrolyte imbalance: Dehydration or other conditions leading to an imbalance of electrolytes, such as potassium, magnesium, calcium, sodium, etc. […] Congenital: Presence of heart diseases at birth, such as QT prolongation. […] Medication side effects: Medication can cause ventricular tachycardia as an adverse reaction. It can also be caused due to an overuse of cocaine or other habit-forming substances.

• #21 What is ventricular tachycardia? Types, symptoms, treatment

  https://www.medicalnewstoday.com/articles/what-is-ventricular-tachycardia

  Ventricular tachycardia (VT) is a heart condition that begins in the lower chambers of the heart. The most common cause of VT is an underlying condition called ischemic heart disease (IHD). However, VT may also occur due to low levels of magnesium. […] There may be a link between VT and conditions that affect the hearts electrical conduction system. However, it is not always clear what leads to VT. The most common cause of VT is underlying IHD, but other heart conditions can also trigger it. Common causes of VT include: a lack of blood flow to the heart, which deprives it of oxygen; conditions of the heart muscle that affect its structure; side effects of some medications; use of illegal drugs, such as cocaine; sarcoidosis, which is an inflammatory condition that affects the skin or body tissues; structural heart disease; damage to the heart due to a heart attack; heart failure. […] One of the main causes of VT is underlying IHD.

• #22 VFib vs. V-Tach: Differences, treatment, and outlook

  https://www.medicalnewstoday.com/articles/vfib-vs-vtach

  Ventricular tachycardia (VT) is the most common cause of VT. IHD refers to heart problems resulting from narrowed arteries, which impair the delivery of blood and oxygen to the heart. […] Other potential causes of VT include: cardiomyopathies, structural heart disease, certain inherited heart conditions, electrolyte imbalances, such as insufficient potassium, insufficient calcium, insufficient magnesium, use of illegal drugs, such as cocaine or methamphetamine, digitalis toxicity, which can occur from a heart medication called digitalis.

• #23 Ventricular tachycardia

  https://contenidos.bupasalud.com/en/health-and-wellness/bupa-life/ventricular-tachycardia

  Ventricular tachycardia causes your heart to beat too fast, usually at a rate of about 120 to 200 beats per minute. Ventricular tachycardia is a type of arrhythmia (abnormal heart rhythm) caused by faulty electrical signals in your heart muscle fibres. […] Many conditions that affect your heart or blood circulation can cause ventricular tachycardia. These include: heart valve disease, heart muscle disease (cardiomyopathy), coronary artery disease, heart problems since birth (congenital heart disease). […] Certain factors can trigger ventricular tachycardia, such as: certain medicines or illegal drugs, emotional or physical stress (including exercise). […] You may develop ventricular tachycardia without having any apparent underlying cause or risk factor. […] Torsades de pointes is a form of ventricular tachycardia. It occurs typically in people who have a condition called a long QT syndrome.

• #24 Polymorphic Ventricular Tachycardia: Symptoms, Causes, and Treatments

  https://www.healthline.com/health/polymorphic-ventricular-tachycardia

  Polymorphic ventricular tachycardia is an abnormal heart rhythm where the bottom chambers of your heart beat too quickly. […] Different conditions may cause polymorphic ventricular tachycardia, but the most common cause is acute coronary syndrome. […] Most people with ventricular tachycardia have other heart conditions, including congenital heart defects, heart failure, myocarditis, cardiomyopathy, heart valve disease, a previous heart surgery, a previous heart attack, sarcoidosis, and certain inherited conditions. […] Other causes of ventricular tachycardia may include medication side effects, electrolyte imbalances, and a high intake of alcohol or caffeine. […] People with a rare inherited condition called catecholaminergic polymorphic ventricular tachycardia are at a high risk of cardiac arrest. Up to 30% of people with the condition develop cardiac arrest if left untreated.

• #25

  https://myhealth.alberta.ca/Health/aftercareinformation/pages/conditions.aspx?hwid=ace1549

  Ventricular tachycardia (say „ven-TRICK-yuh-ler tack-ih-KAR-dee-uh”), or VT, is a type of fast heart rhythm. It starts in the lower part of the heart (ventricles). […] Sometimes it’s not known what causes VT. But in most cases, it’s caused by heart disease. This includes having a previous heart attack or congenital heart disease. It also includes hypertrophic cardiomyopathy, dilated cardiomyopathy, and myocarditis. Sometimes VT occurs after heart surgery. Inherited heart rhythm problems can also cause VT. These include long QT syndrome and Brugada syndrome. […] Some medicines can cause VT. These include antiarrhythmic medicines, other heart medicines, and antibiotics. Less common causes include blood imbalances. Examples are low potassium levels and other electrolyte imbalances. […] Herbal remedies that contain ephedra, also known as ma huang, can trigger VT. Drugs (such as stimulants, like cocaine) also may cause it.

• #26 Types of Ventricular Arrhythmias | NYU Langone Health

  https://nyulangone.org/conditions/ventricular-arrhythmias/types

  People with ventricular arrhythmias frequently have a history of heart disease, including a prior heart attack, a congenital heart defect, an inherited cardiomyopathy, or an electrolyte imbalance that can be caused by dehydration or extreme exercise or dieting. […] Certain conditions can also contribute to ventricular arrhythmia, including hyperthyroidism, sarcoidosis, and diabetes. Use of recreational drugs or steroids also puts a person at risk. […] Ventricular tachycardia (VT) is a rapid heart rhythm more than 100 beats per minute that begins in the lower chambers of the heart. This condition prevents the heart’s chambers from filling adequately with blood, reducing the amount that is pumped to the body. VT requires immediate medical attention. […] This condition is commonly caused by a previous heart attack, which can create scar tissue that interferes with the heart’s electrical signals. It can also occur in people with cardiomyopathy, a condition in which the heart enlarges, thickens, or stiffens, reducing its ability to pump blood to the body, or idiopathic ventricular tachycardia, which is an electrical disorder that can occur in patients who do not have heart disease. The use of recreational drugs such as cocaine can also trigger VT.

• #27 Causes | Stanford Health Care

  https://stanfordhealthcare.org/medical-conditions/blood-heart-circulation/ventricular-arrhythmia/causes.html

  Ventricular arrhythmias occur because of problems with the electrical signals that control heart rate and rhythm, such as: […] Causes of ventricular tachycardia: Damage to the heart muscle after a heart attack […] Heart conditions including cardiomyopathy, congenital heart disease, heart failure, and valvular heart disease […] Heart surgery […] Lack of oxygen […] Low levels of certain electrolytes, such as sodium or potassium […] Medications used to treat arrhythmias.

• #28 Tachycardia > Fact Sheets > Yale Medicine

  https://www.yalemedicine.org/conditions/tachycardia

  Ventricular tachycardia is an elevated heart rate that originates in the hearts lower chambers. […] Supra-ventricular and ventricular tachycardia often occur without warning and are linked to an abnormal electrical pathway in the heart or a specific area in the heart that acts independently. Conditions linked with these types of tachycardia include: High blood pressure, Structural heart disease, Heart attack, Heart surgery, Heart failure, Myocarditis, a heart infection, Sleep apnea, Having obesity, A family history of tachycardia, Congenital electrical extra connection or bypass tract.

• #29 Ventricular Tachycardia – Causes & Symptomsplusclosechevron-upfacebooklinkedinangle-rightellipsis-vyoutube-playinstagrammagnifiercrosschevron-downthree-o-clock-clocklocationclockmailphone-receiver-silhouetteTwitter_newlogo_black

  https://www.drkarthigesanclinic.com/vt-ablation/causes-and-symptoms/

  Have you felt your heart race like it is running a marathon, even when you are still? This could be a sign of ventricular tachycardia, or VT for short. […] It is crucial to know what causes this and the signs to watch for. […] What causes V-tach? Here are some reasons: Heart conditions that leave scars and mess up the electrical tracks. […] Genes can play a part, like with a rare kind called CPVT. […] Electrolyte imbalance or using stimulant drugs can increase the odds. […] Looking into VT causes is key to understanding the heart diseases that change the heart’s structure, such as heart attack or cardiomyopathy. […] These issues change how your heart looks and functions, making VT more likely to happen. […] Our genes can set the stage for VT. CPVT is one such genetic curveball that makes the heart go haywire with exercise or stress.

• #30 Ventricular Tachycardia and Sudden Cardiac Death

  https://pmc.ncbi.nlm.nih.gov/articles/PMC2664600/

  In view of these recognized genetic cause of syndromes causing VT or VF, a family history of sudden death is often an important finding that mandates careful evaluation for these conditions in patients presenting with ventricular arrhythmias. […] Ventricular tachycardia that occurs in the absence of structural heart disease, genetic conditions such as long QT syndrome, or metabolic/electrolyte abnormalities is referred to as idiopathic VT. […] Idiopathic VTs tend to originate from a few specific locations that can be recognized from the ECG. […] Most idiopathic VTs originate from the right ventricular outflow tract (RVOT) and thus most commonly have a left bundle branch block morphology and an inferiorly directed axis. […] Idiopathic RVOT tachycardia originates from a focus, with automaticity mediated by cyclic adenosine monophosphate-dependent triggered activity leading to intracellular calcium overload.

• #31 Ventricular Tachycardia | Types of Arrhythmias | Henry Ford Health – Detroit, MI

  https://www.henryford.com/services/electrophysiology/arrhythmias/ventricular-tachycardia

  V-tach may occasionally occur in people with normal, healthy hearts. Its called idiopathic ventricular tachycardia and typically isnt serious. […] Usually, though, another heart problem causes V-tach. These conditions can damage the hearts electrical system and create the abnormal signals responsible for V-tach. They include: Heart attack, Heart failure, Heart valve disease, High blood pressure, Scar tissue from heart surgery.

• #32 Ventricular Tachycardia in Normal Hearts (Idiopathic VT) – Melbourne Heart Rhythm

  https://www.melbourneheartrhythm.com.au/learn/conditions/77-ventricular-tachycardia-in-normal-hearts-idiopathic-vt

  Ventricular Tachycardia (VT) occurs most commonly in patients with structural heart disease such as weakened heart muscle (cardiomyopathy) or when scar tissue develops in the heart as a result of myocardial infarction. In this situation the mechanism is usually due to re-entry circuits formed within areas of abnormal scar. […] VT can also occur in patients with normal hearts, so-called “Idiopathic Ventricular Tachycardia” and this accounts for about 10% of all VTs. Idiopathic Ventricular Tachycardia is usually due to a different mechanism than VT seen in the presence of structural heart disease. Idiopathic VT is usually due to a small nest (focus) of overly excitable heart tissue that fires of erratically, like a muscle twitch. […] Idiopathic VTs can originate from a variety of locations such as the inside surface of the heart (endocardial), deep within the ventricular muscle (mid-myocardial), the outside surface (epicardial) of the heart, in the aortic valve or in the veins surrounding the heart. The most common form of idiopathic VT is right ventricular outflow tract VT (RVOT-VT). It accounts for approximately 70% of idiopathic VTs. […] Overall this form of VT generally has a much better prognosis that VT in the presence of structural heart disease and is not usually associated with a risk of sudden cardiac.

• #33 Ventricular Tachycardia in Normal Hearts (Idiopathic VT) – Melbourne Heart Rhythm

  https://staging.melbourneheartrhythm.com.au/learn/conditions/77-ventricular-tachycardia-in-normal-hearts-idiopathic-vt

  Ventricular Tachycardia (VT) occurs most commonly in patients with structural heart disease such as weakened heart muscle (cardiomyopathy) or when scar tissue develops in the heart as a result of myocardial infarction. In this situation the mechanism is usually due to re-entry circuits formed within areas of abnormal scar. […] VT can also occur in patients with normal hearts, so-called “Idiopathic Ventricular Tachycardia” and this accounts for about 10% of all VTs. Idiopathic Ventricular Tachycardia is usually due to a different mechanism than VT seen in the presence of structural heart disease. Idiopathic VT is usually due to a small nest (focus) of overly excitable heart tissue that fires of erratically, like a muscle twitch. […] Idiopathic VTs can originate from a variety of locations such as the inside surface of the heart (endocardial), deep within the ventricular muscle (mid-myocardial), the outside surface (epicardial) of the heart, in the aortic valve or in the veins surrounding the heart. The most common form of idiopathic VT is right ventricular outflow tract VT (RVOT-VT). It accounts for approximately 70% of idiopathic VTs.

• #34 Ventricular Tachycardia and Sudden Cardiac Death

  https://pmc.ncbi.nlm.nih.gov/articles/PMC2664600/

  Although most originate from the right side of the outflow tract region, some originate from the left ventricular outflow tract. […] These VTs may be sustained or may present as repetitive runs of nonsustained VTs, referred to as repetitive monomorphic VTs. […] A less common form of idiopathic VT results from reentry involving the fascicles of the left bundle branch, leading to VT with a right bundle branch block configuration, usually with a superiorly directed QRS-axis tachycardia. […] Interestingly, this tachycardia is sensitive to verapamil. […] Idiopathic forms of VT are rarely life-threatening but may be associated with hemodynamic compromise and syncope when rapid and sustained.

• #35 Ventricular Tachycardia in Normal Hearts (Idiopathic VT) – Melbourne Heart Rhythm

  https://staging.melbourneheartrhythm.com.au/learn/conditions/77-ventricular-tachycardia-in-normal-hearts-idiopathic-vt

  Overall this form of VT generally has a much better prognosis that VT in the presence of structural heart disease and is not usually associated with a risk of sudden cardiac. High-risk patients (recurrent syncope and sudden cardiac death survivors) with inherited ion channelopathies predisposing them to VT benefit from the insertion of an Implantable Cardioverter-Defibrillator (ICD).

• #36 What Is Ventricular Tachycardia?

  https://www.icliniq.com/articles/heart-circulatory-health/ventricular-tachycardia

  Physiologically, there are three causes of tachycardia in the upper chamber of the heart: automaticity, re-entry, and triggered activity. Automaticity occurs when the sinus node starts functioning incorrectly due to the hearts chemical elements going out of proportion. This is generally seen in the younger population. When an electrical signal that informs the heart cells to beat again sends the same information, it re-enters. This is usually found in the older population. When an electrical impulse repeatedly responds with a combination of incorrect reaction and the immediate correct response of the cells, it is called triggered activity.

• #37 Ventricular Tachycardia Treatment in Delhi, India | Symptoms & Causes

  https://www.blkmaxhospital.com/our-specialities/heart-centre/conditions-treatments/ventricular-tachycardia

  Risk factors that increase the chances of developing ventricular tachycardia include the following: […] Heart conditions: Any pre-existing heart diseases, such as a history of heart attack, structural heart changes, etc., increase the risk of developing ventricular tachycardia. […] Substance overuse: Misuse of stimulating substances such as cocaine or methamphetamine increases the risk of developing ventricular tachycardia. […] Electrolyte disturbances: Severe electrolyte disturbances, such as acute serious dehydration, make you more prone to develop ventricular tachycardia. […] Side effects of medications: Various medications, such as antibiotics, antifungals, antipsychotic drugs, etc., can cause ventricular tachycardia. […] Ventricular tachycardia is the result of the electrical signal abnormalities in the ventricles, at the cellular level. Damaged heart tissue or scarring of heart tissue, as in previous myocardial episodes, leads to electrical reentry and enhanced automaticity, causing the triggered activity in the electrical conduction. This leads to fast heart rhythm and reduced cardiac output.

• #38 Ventricular tachycardia (VT): ECG criteria, causes, classification, treatment – The Cardiovascular

  https://ecgwaves.com/topic/ventricular-tachycardia-vt-ecg-treatment-causes-management/

  Coronary artery disease (ischemic heart disease) is by far the most common cause of ventricular tachycardia and the mechanism is mostly re-entry. As mentioned earlier in this chapter, re-entry occurs when there is a central block ahead of the depolarizing impulse and the cells surrounding the block has varying conductivity. In ischemic heart disease, the central block is typically ischemic/necrotic myocardium (which do not conduct any impulses) while the surrounding cells have dysfunctional conduction due to ischemia. Ventricular tachycardia due to ischemia poses a high risk of degenerating into ventricular fibrillation and cardiac arrest.

• #39 Ventricular Tachycardia – Monomorphic VT • LITFL • ECG Library

  https://litfl.com/ventricular-tachycardia-monomorphic-ecg-library/

  Ventricular Tachycardia (VT) is a broad complex tachycardia originating from the ventricles. […] Causes of Monomorphic VT include Ischaemic Heart Disease, Dilated cardiomyopathy, Hypertrophic cardiomyopathy, and Chagas Disease. […] The presence of pre-existing poor ventricular function is strongly associated with cardiovascular compromise. […] Clinical Features Suggestive of VT include Age 35 (positive predictive value of 85%), Structural heart disease, Ischaemic heart disease, Previous MI, Congestive heart failure, Cardiomyopathy, and Family history of sudden cardiac death.

• #40 Understanding Ventricular Tachycardia (VT): Symptoms, Treatments & Self-Assessment Quiz | UI Health Care | University of Iowa Health Care

  https://uihc.org/health-topics/test-your-understanding-ventricular-tachycardias-symptoms-causes-and-treatments

  Ventricular tachycardia (VT) is a serious heart condition that can be life-threatening if not properly managed. […] There are several potential causes of VT, often related to underlying heart conditions. The most common causes include prior heart attacks, cardiomyopathy (a weakened heart muscle), and electrolyte imbalances, Hamon says. Other factors, such as certain medications or inherited heart conditions, can also play a role. […] VT can be dangerous, especially if it lasts for a long time or leads to ventricular fibrillation (a chaotic, life-threatening heart rhythm). If VT causes the heart to stop pumping blood effectively, it can lead to sudden cardiac arrest, warns Hamon. […] Treatment for VT depends on the severity of the condition and its underlying causes. […] While not all cases of VT can be prevented, certain lifestyle changes can help lower your risk.

• #41 Ventricular Arrhythmia: Causes, Symptoms & Treatment

  https://my.clevelandclinic.org/health/diseases/21854-ventricular-arrhythmia

  Ventricular tachycardia (VT) happens when the lower chambers of the heart beat unusually fast. This can happen because of a malfunction in the heart’s electrical system. In some cases, VT can turn into ventricular fibrillation, which is a more dangerous condition. […] Ventricular tachycardia causes include: Cardiomyopathy. Cardiovascular disease (especially when it changes the shape of your heart). Congenital heart conditions (heart problems you’re born with). Electrolyte imbalances. Heart attack. Heart failure. Heart inflammation. Heart surgery. Heart valve diseases. Lack of oxygen. Medications. […] Ventricular arrhythmias are most common in people who have heart-related conditions and diseases. As a result, the likelihood of developing these arrhythmias naturally increases as you get older. In addition, diseases that change the heart’s structure have a much higher risk of causing ventricular arrhythmias.

• #42 Ventricular Tachycardia (VT) Symptoms & Treatment | Baptist Health

  https://www.baptisthealth.com/care-services/conditions-treatments/ventricular-tachycardia

  Ventricular tachycardia causes can include: […] Use of drugs such as cocaine […] Excessive use of caffeine or alcohol […] Side effects from certain medications […] Having a history of heart disease or sarcoidosis (an inflammatory disease) may increase the risk of having ventricular tachycardia. […] A family history of ventricular tachycardia or other heart rhythm disorders may increase the risk of having this condition. […] Ventricular tachycardia may result from an imbalance of electrolytes, minerals that help regulate heart rhythm.

• #43 Ventricular tachycardia (VT): ECG criteria, causes, classification, treatment – The Cardiovascular

  https://ecgwaves.com/topic/ventricular-tachycardia-vt-ecg-treatment-causes-management/

  Patients with ventricular tachycardia almost invariably have significant underlying heart disease. The most common causes are coronary heart disease (acute coronary syndromes or ischemic heart disease), heart failure, cardiomyopathy (dilated cardiomyopathy, hypertrophic obstructive cardiomyopathy), valvular disease. Less common causes are arrhythmogenic right ventricular cardiomyopathy/dysplasia (ARVC/ARVD), Brugada syndrome, long QT syndrome, sarcoidosis, Prinzmetals angina (coronary vasospasm), electrolyte disorders, congenital heart disease and catecholamine-induced ventricular tachycardia. […] The vast majority of patients with ventricular tachycardia either have coronary artery disease (ischemic heart disease), heart failure, cardiomyopathy or valvular heart disease. In these populations, one of the strongest predictors of sudden cardiac death is left ventricular function. Individuals with reduced left ventricular function (e.g. defined as ejection fraction 40 %) are at high risk of sudden cardiac arrest.

• #44

  https://continentalhospitals.com/diseases/ventricular-tachycardia/

  Electrolyte Imbalance: Abnormal levels of electrolytes such as potassium, sodium, calcium, and magnesium in the blood can disrupt the heart’s electrical activity and trigger VT. […] Scar Tissue from Previous Heart Surgery: Scarring resulting from previous heart surgeries, such as coronary artery bypass grafting (CABG) or cardiac ablation, can create areas of abnormal electrical conduction in the heart tissue, increasing the likelihood of VT. […] Congenital Heart Defects: Some individuals are born with structural abnormalities in their heart, such as abnormal connections between the chambers or abnormal positioning of the heart’s electrical pathways, which can predispose them to VT. […] Myocarditis: Inflammation of the heart muscle, often due to viral infections or autoimmune diseases, can cause damage to the heart tissue and disrupt its normal electrical activity, leading to VT.

• #45 Ventricular Tachycardia: Causes, Symptoms, and Treatment | Medanta | Medanta

  https://www.medanta.org/patient-education-blog/understanding-ventricular-tachycardia-causes-symptoms-and-risks

  Ventricular tachycardia is a serious medical emergency characterized by a rapid heart rate that can lead to sudden cardiac arrest if not treated promptly. […] Although it may be hard to determine the exact cause of ventricular tachycardia, some conditions have been known to cause the symptoms. […] These include: Diseases that affect the structure of the heart, such as previous infection, Heart Attack, or a congenital abnormality, Heart failure, Coronary artery disease, Cardiomyopathy, Congenital coronary artery abnormalities, Electrolyte imbalances, Imbalances in blood PH, Inherited conditions like long qt syndrome, arrhythmogenic right ventricular dysplasia, Side effects of medication, Stimulants like cocaine or methamphetamine. […] The risk of developing ventricular tachycardia increases with age or if somebody in the family already has the condition or another heart rhythm problem. A history of a previous heart attack also increases the risk of developing ventricular tachycardia due to damaged heart muscles. There are also some medications that may increase your chances of developing ventricular tachycardia.

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