Materiały źródłowe

• #1 Deep vein thrombosis: pathogenesis, diagnosis, and medical management

  https://pmc.ncbi.nlm.nih.gov/articles/PMC5778510/

  Deep vein thrombosis (DVT) is a major preventable cause of morbidity and mortality worldwide. […] Normal blood physiology hinges on a delicate balance between pro- and anti-coagulant factors. Virchows Triad distills the multitude of risk factors for DVT into three basic elements favoring thrombus formation: venous stasis, vascular injury, and hypercoagulability. […] Venous thrombosis tends to occur in areas with decreased or mechanically altered blood flow such as the pockets adjacent to valves in the deep veins of the leg. […] The hypercoagulable micro-environment that ensues may downregulate certain antithrombotic proteins that are preferentially expressed on venous valves including thrombomodulin and endothelial protein C receptor (EPCR). […] Debate remains regarding the precise location of tissue factor in this process, whether expressed on the endothelium or by cells within the extravascular tissue, but there is general agreement that tissue factor serves as the primary nidus for thrombus formation.

• #2 Deep Vein Thrombosis – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK507708/

  Deep vein thrombosis (DVT) is an obstructive disease with a hindering venous reflux mechanism. DVT usually involves the lower limb venous system, with clot formation originating in a deep calf vein and propagating proximally. […] According to the Virchow triad, the following are the main pathophysiological mechanisms involved in DVT: Damage to the vessel wall, Blood flow turbulence, Hypercoagulability. […] The triggers of venous thrombosis are frequently multifactorial, with the different parts of the triad of Virchow contributing in varying degrees in each patient, but all result in early thrombus interaction with the endothelium. This stimulates local cytokine production and causes leukocyte adhesion to the endothelium, promoting venous thrombosis. Depending on the relative balance between the coagulation and thrombolytic pathways, thrombus propagation occurs. DVT is commonest in the lower limb below the knee and starts at low-flow sites, such as the soleal sinuses, behind venous valve pockets. […] A potential correlation between DVT and atherosclerosis (AS) has been proposed. The endothelial dysfunction involved in the pathophysiological mechanism of DVT would potentially result in AS. Accordingly, a greater risk of subsequent AS in patients with DVT is predicted.

• #3 Deep Venous Thrombosis (DVT): Practice Essentials, Background, Anatomy

  https://emedicine.medscape.com/article/1911303-overview

  In the 19th century, Rudolf Virchow described three factors that are critically important in the development of venous thrombosis (DVT): (1) venous stasis, (2) activation of blood coagulation, and (3) venous endothelial (intimal) damage. These factors have come to be known as the Virchow triad. […] Venous stasis occurs as a result of anything that slows or obstructs the flow of venous blood. This results in increased blood viscosity and the formation of microthrombi, which are not washed away by fluid movement; the thrombus that forms may then grow and propagate. Endothelial damage in the blood vessel may be intrinsic or secondary to external trauma. It may result from accidental injury or surgical insult. A hypercoagulable state can occur due to a biochemical imbalance between circulating factors. This may result from an increase in circulating tissue activation factor, combined with a decrease in circulating plasma antithrombin and fibrinolysins.

• #4

  https://www.jci.org/articles/view/60229

  In the 19th century, the noted physician Virchow proposed a triad of physiological alterations that increase the risk of VTE: changes in blood flow, in the blood itself, and in the endothelial cells lining the blood vessel. […] Reduced blood flow and stasis allow the accumulation of procoagulant proteases, such as thrombin, that may overcome the local anticoagulant pathways and induce thrombosis. […] Thrombophilia describes a disorder in which the blood has a tendency to clot. Thrombophilia can be caused by increases in procoagulant proteins, the presence of variant clotting proteins that are more procoagulant, decreases in anticoagulant proteins, and/or decreased fibrinolysis. […] The endothelial lining of blood vessels plays a critical role in preventing thrombosis by providing a surface that prevents attachment of cells and proteins required for clotting.

• #5 Deep Vein Thrombosis and Pulmonary Embolism | Yellow Book | CDC

  https://www.cdc.gov/yellow-book/hcp/travel-air-sea/deep-vein-thrombosis-and-pulmonary-embolism.html

  Deep vein thrombosis (DVT) is a condition in which a blood clot develops in the deep veins, usually in the lower extremities. […] Virchow’s classic triad for thrombus formation is venous stasis, vessel wall damage, and a hypercoagulable state. Prolonged, cramped sitting during long-distance travel interferes with venous flow in the legs, creating venous stasis. […] Coagulation activation can result from an interaction between air cabin conditions (e.g., hypobaric hypoxia) and individual risk factors for VTE. Studies of the pathophysiologic mechanisms for the increased risk of VTE after long-distance travel have not produced consistent results, but venous stasis appears to play a major role. Other factors specific to air travel might increase coagulation activation, particularly in travelers with preexisting risk factors for VTE.

• #6 Deep vein thrombosis – Knowledge @ AMBOSS

  https://www.amboss.com/us/knowledge/deep-vein-thrombosis/

  Deep vein thrombosis (DVT) is the formation of a blood clot within the deep veins, most commonly those of the lower extremities. […] Any factor that causes hypercoagulability, endothelial damage, and/or venous stasis can cause DVT (see Virchow triad). […] The Virchow triad refers to the three main pathophysiological components of thrombus formation. […] Hypercoagulability: increased platelet adhesion, thrombophilia (e.g., factor V Leiden mutation), use of oral contraceptives, pregnancy. […] Endothelial damage: Inflammatory or traumatic vessel injuries can lead to activation of clotting factors through contact with exposed subendothelial collagen. […] Venous stasis: varicosis, external pressure on the extremity, immobilization (e.g., hospitalization, bed rest, long flights or bus rides), local application of heat.

• #7 Venous Thrombosis: Pathogenesis and Potential for Embolism

  https://www.uspharmacist.com/article/venous-thrombosis-pathogenesis-and-potential-for-embolism

  A deep vein thrombosis (DVT) is stationary clotting blood adhered to the deep vein of the pelvis or an extremity and usually occurs in the calf or thigh. […] Inappropriate thrombus formation is a disruption of homeostasis and may result from an alteration in any of the factors listed below. The dominant influence, and the one factor that by itself can lead to thrombosis, is endothelial injury. […] Endothelial injury causes subendothelial collagen exposure and platelet adherence, among other changes; many factors can contribute to the injury, including hypertension, vasculitis, scarred valves, bacterial endotoxins, cholesterolemia, and chemicals from cigarette smoke. […] Stasis and turbulence are alterations in normal blood flow, which can cause endothelial injury. […] Hypercoagulability can be described as any alteration of the coagulation pathway that places the patient at risk for thrombosis.

• #8 Venous Thrombosis: Pathogenesis and Potential for Embolism

  https://www.uspharmacist.com/article/venous-thrombosis-pathogenesis-and-potential-for-embolism

  There are two types of hypercoagulability states; primary disorders are genetically inherited and secondary disorders are acquired. […] Hypercoagulability associated with advancing age is thought to be due to an increase in platelet aggregation and a reduction in prostacyclin, a potent vasodilator and inhibitor of platelet aggregation that is released by the endothelium.

• #9 Deep Venous Thrombosis (DVT): Practice Essentials, Background, Anatomy

  https://emedicine.medscape.com/article/1911303-overview

  The origin of venous thrombosis is frequently multifactorial, with components of the Virchow triad assuming variable importance in individual patients, but the end result is early thrombus interaction with the endothelium. This interaction stimulates local cytokine production and facilitates leukocyte adhesion to the endothelium, both of which promote venous thrombosis. Depending on the relative balance between activated coagulation and thrombolysis, thrombus propagation occurs. […] Thrombosis is the homeostatic mechanism whereby blood coagulates or clots, a process crucial to the establishment of hemostasis after a wound. It may be initiated via several pathways, usually consisting of cascading activation of enzymes that magnify the effect of an initial trigger event. A similar complex of events results in fibrinolysis, or the dissolution of thrombi.

• #10 Deep vein thrombosis: pathogenesis, diagnosis, and medical management – Stone – Cardiovascular Diagnosis and Therapy

  https://cdt.amegroups.org/article/view/16872/html

  Virchows Triad, first described in 1856, implicates three contributing factors in the formation of thrombosis: venous stasis, vascular injury, and hypercoagulability. Venous stasis is the most consequential of the three factors, but stasis alone appears to be insufficient to cause thrombus formation. However, the concurrent presence of venous stasis and vascular injury or hypercoagulability greatly increases the risk for clot formation. The clinical conditions most closely associated with DVT are fundamentally related to the elements of Virchows Triad; these include surgery or trauma, malignancy, prolonged immobility, pregnancy, congestive heart failure, varicose veins, obesity, advancing age, and a history of DVT. […] Venous thrombosis tends to occur in areas with decreased or mechanically altered blood flow such as the pockets adjacent to valves in the deep veins of the leg. While valves help to promote blood flow through the venous circulation, they are also potential locations for venous stasis and hypoxia. Multiple postmortem studies have demonstrated the propensity for venous thrombi to form in the sinuses adjacent to venous valves. As blood flow slows, oxygen tension declines with a coincident increase in hematocrit. The hypercoagulable micro-environment that ensues may downregulate certain antithrombotic proteins that are preferentially expressed on venous valves including thrombomodulin and endothelial protein C receptor (EPCR). In addition to reducing important anticoagulant proteins, hypoxia drives the expression of certain procoagulants. Among these is P-selectin, an adhesion molecule which attracts immunologic cells containing tissue factor to the endothelium. Debate remains regarding the precise location of tissue factor in this process, whether expressed on the endothelium or by cells within the extravascular tissue, but there is general agreement that tissue factor serves as the primary nidus for thrombus formation. Thrombus formation appears to require both tissue factor and P-selectin.

• #11 Deep Venous Thrombosis (DVT): Practice Essentials, Background, Anatomy

  https://emedicine.medscape.com/article/1911303-overview

  ThrombI usually form behind valve cusps or at venous branch points, most of which begin in the calf. Venodilation or turbulent flow in these areas may disrupt the endothelial cell barrier and expose the subendothelium. Platelets adhere to the subendothelial surface by means of von Willebrand factor or fibrinogen in the vessel wall. Neutrophils also adhere to the basement membrane and migrate into the subendothelium. Activation of both neutrophils and platelets then leads to the release of procoagulant and inflammatory mediators, forming complexes on the surface of platelets and increasing the rate of thrombin generation and fibrin formation. […] Studies have shown that low flow sites, such as the soleal sinuses, behind venous valve pockets, and at venous confluences, are at most risk for the development of venous thrombi. However, stasis alone is not enough to facilitate the development of venous thrombosis. Experimental ligation of rabbit jugular veins for periods of up to 60 minutes have failed to consistently cause venous thrombosis. […] Although patients who are immobilized for long periods of time seem to be at high risk for the development of venous thrombosis, an additional stimulus is required to develop DVT.

• #12 The Basic Principles of Pathophysiology of Venous Thrombosis

  https://www.mdpi.com/1422-0067/25/21/11447

  The past few decades have brought tremendous insight into the molecular and pathophysiological mechanisms responsible for thrombus generation. […] About half of DVTs are, however, lacking such triggers and are called unprovoked. Venous stasis and hypoxia at the valve sinus level may start a chain of reactions. […] To better understand the mechanisms behind DVT and reach beyond the above-mentioned simplifications, animal models and clinical epidemiological studies have brought insight into the complex interplay between leukocytes, platelets, endothelium, cytokines, complements, and coagulation factors and inhibitors. […] The pathophysiology of venous thrombosis has historically been explained with Virchow’s triad, which consists of hypercoagulability, venous stasis, and injury to the endothelium of the blood vessels.

• #13 The Basic Principles of Pathophysiology of Venous Thrombosis

  https://www.mdpi.com/1422-0067/25/21/11447

  The principles of pathophysiology of VTE have become much more complex than the classic Virchow’s triad. Venous stasis with hypoxia or accumulation of activated coagulation factors, platelets, leukocytes and activated endothelium may initiate inflammatory processes that play a major role in thrombus generation.

• #14 Deep vein thrombosis: pathogenesis, diagnosis, and medical management

  https://pmc.ncbi.nlm.nih.gov/articles/PMC5778510/

  Thrombus formation appears to require both tissue factor and P-selectin. […] A venous thrombus has essentially two components, an inner platelet rich white thrombus forming the so-called lines of Zahn surrounded by an outer red cell dense fibrin clot. […] As the ratio of procoagulants to anticoagulants increases, so does the risk of thrombus formation. […] In humans, less is known regarding the role of tissue factor inhibitor pathway. […] There are also a number of familial variants that predispose to thrombus formation by increasing the levels of factor VII, VIII, IX, von Willebrand factor, and prothrombin. […] Malignancy can exert a compressive effect on veins contributing to stasis. […] Together, they increase thrombosis risk synergistically. […] Taken together, thrombosis formation is a dynamic, multicausal process that hinges on a fine balance of physical and biochemical factors.

• #15 Deep vein thrombosis – Wikipedia

  https://en.wikipedia.org/wiki/Deep_vein_thrombosis

  Tissue factor, via the tissue factor-factor VIIa complex, activates the extrinsic pathway of coagulation and leads to conversion of prothrombin to thrombin, followed by fibrin deposition. Fresh venous clots are red blood cell and fibrin rich. Platelets and white blood cells are also components. In cancer, tissue factor is produced by cancer cells. Cancer also produces unique substances that stimulate factor Xa, cytokines that promote endothelial dysfunction, and plasminogen activator inhibitor-1, which inhibits the breakdown of clots (fibrinolysis). […] DVT often develops in the calf veins and „grows” in the direction of venous flow, towards the heart. DVT most frequently affects veins in the leg or pelvis including the popliteal vein (behind the knee), femoral vein (of the thigh), and iliac veins of the pelvis. The process of fibrinolysis, where DVT clots can be dissolved back into the blood, acts to temper the process of thrombus growth. This is the preferred process. Aside from the potentially deadly process of embolization, a clot can resolve through organization, which can damage the valves of veins, cause vein fibrosis, and result in non-compliant veins. […] In summary, the pathogenesis of DVT involves a complex interplay of genetic, environmental, and physiological factors that lead to thrombus formation in the venous system, primarily influenced by blood flow dynamics, inflammatory processes, and the coagulation cascade.

• #15 Deep vein thrombosis – Wikipedia

  https://en.wikipedia.org/wiki/Deep_vein_thrombosis

  Deep vein thrombosis (DVT) is a type of venous thrombosis involving the formation of a blood clot in a deep vein, most commonly in the legs or pelvis. The mechanism behind DVT formation typically involves some combination of decreased blood flow, increased tendency to clot, changes to the blood vessel wall, and inflammation. Risk factors include recent surgery, older age, active cancer, obesity, infection, inflammatory diseases, antiphospholipid syndrome, personal history and family history of VTE, trauma, injuries, lack of movement, hormonal birth control, pregnancy, and the period following birth. VTE has a strong genetic component, accounting for approximately 50 to 60% of the variability in VTE rates. […] The beginning of venous thrombosis is thought to arise from activation of endothelial cells, platelets, and leukocytes, with initiation of inflammation and formation of microparticles that trigger the coagulation system via tissue factor. Vein wall inflammation is likely the inciting event. Importantly, the activated endothelium of veins interacts with circulating white blood cells (leukocytes). While leukocytes normally help prevent blood from clotting, upon stimulation, leukocytes facilitate clotting. Neutrophils are recruited early in the process of venous thrombi formation. They release pro-coagulant granules and neutrophil extracellular traps (NETs) or their components, which play a role in venous thrombi formation.

• #16 Deep vein thrombosis: pathogenesis, diagnosis, and medical management – Stone – Cardiovascular Diagnosis and Therapy

  https://cdt.amegroups.org/article/view/16872/html

  A venous thrombus has essentially two components, an inner platelet rich white thrombus forming the so-called lines of Zahn surrounded by an outer red cell dense fibrin clot. Fibrin and extracellular DNA complexed with histone proteins forms the outer scaffold, which may be important in determining thrombus susceptibility to tissue plasminogen activator (TPA) and thrombolysis. As the ratio of procoagulants to anticoagulants increases, so does the risk of thrombus formation. The proportion of proteins is in part determined by the ratio of endothelial cell surface to blood volume. A decreased cell surface to blood volume ratio (i.e., large vessels) favors procoagulants. Factor VIII, von Willebrand factor, factor VII and prothrombin seem to be particularly influential in tipping the scale towards coagulation. In addition to promoting thrombin generation, prothrombin inhibits the anticoagulant properties of activated protein C, thereby dampening a natural anticoagulant pathway. There are three such pathways: the protein C anticoagulant pathway (protein C, protein S, thrombomodulin, and perhaps EPCR), heparin-antithrombin pathway, and tissue factor inhibitor pathway. Defects in these pathways are associated with an increased risk for thrombus formation. In humans, less is known regarding the role of tissue factor inhibitor pathway. There are also a number of familial variants that predispose to thrombus formation by increasing the levels of factor VII, VIII, IX, von Willebrand factor, and prothrombin. In factor V Leiden, which affects up to 5% of Caucasians and increases the risk of thrombosis 7-fold, activated factor Va is resistant to the inhibitory influence of protein C. Other risk factors for clot formation include cancer, oral contraceptives, obesity, and advancing age. Malignancy can exert a compressive effect on veins contributing to stasis. It also leads to shedding of procoagulants such as tissue factor on membrane particles that promotes thrombosis. Obesity and oral contraceptive use are independent risk factors for thrombosis. Together, they increase thrombosis risk synergistically. Finally, advancing age is associated with an increased risk for thrombosis. While the cause for this remains unsettled, several factors related to aging have been observed: greater prevalence of obesity, increased frequency of illness and periods of prolonged immobility, comorbid medical conditions, and an increase in the level of procoagulants without a commensurate increase in anticoagulants such as protein C. Taken together, thrombosis formation is a dynamic, multicausal process that hinges on a fine balance of physical and biochemical factors.

• #17 Deep Venous Thrombosis (DVT) – Cardiovascular Disorders – Merck Manual Professional Edition

  https://www.merckmanuals.com/professional/cardiovascular-disorders/peripheral-venous-disorders/deep-venous-thrombosis-dvt

  Deep venous thrombosis (DVT) results from conditions that impair venous return, lead to endothelial injury or dysfunction, or cause hypercoagulability. […] Lower extremity DVT most often results from impaired venous return (eg, in immobilized patients), endothelial injury or dysfunction (eg, after leg fractures), and hypercoagulability. […] Upper extremity DVT most often results from endothelial injury due to central venous catheters, pacemakers, or injection drug use. […] Deep venous thrombosis usually begins in venous valve cusps. Thrombi consist of thrombin, fibrin, and red blood cells with relatively few platelets (red thrombi); without treatment, thrombi may propagate proximally or travel to the lungs. […] Common complications of DVT include chronic venous insufficiency, post-thrombotic syndrome, and pulmonary embolism.

• #18

  https://www.orthobullets.com/basic-science/9056/thromboembolism-pe-and-dvt-prophylaxis

  Venous thromboembolism (VTE) includes both pulmonary embolism (PE) and deep venous thrombosis (DVT) […] Mechanism of clot formation includes stasis and fibrin formation; thromboplastin (aka Tissue Factor (TF), platelet tissue factor, factor III) is released during dissection which leads to activation of the extrinsic pathway and fibrin formation. […] DVT usually begins in venous valve cusps. […] Thrombi consist of thrombin, fibrin, and RBCs with relatively few platelets. […] The risk of recurrence of DVT is 25%.

• #19 Deep Vein Thrombosis (DVT): Symptoms, Causes, Treatment and More

  https://www.verywellhealth.com/deep-vein-thrombosis-overview-2223680

  Some genetic mutations increase the risk of abnormal blood clots. Examples include prothrombin 20210 (also known as factor II) mutation, factor V Leiden thrombophilia, and hereditary antithrombin deficiency (antithrombin III deficiency or AT III deficiency). […] Anticoagulants do not break up existing clots, but work to prevent further blood clotting in the veins and reduce your chances of developing a PE. […] In 2020, the American Society of Hematology (ASH) released updated treatment guidelines for DVT and pulmonary embolism. Updates to these evidence-based treatment recommendations to be aware of include: For people with PE and cardiac instability, clot-busting medications (thrombolytic therapy) followed by anticoagulation is recommended over just anticoagulation alone. […] Deep vein thrombosis is a serious condition that should be treated immediately.

• #20 Deep vein thrombosis (DVT) – Symptoms & causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/deep-vein-thrombosis/symptoms-causes/syc-20352557

  Deep vein thrombosis (DVT) occurs when a blood clot (thrombus) forms in one or more of the deep veins in the body, usually in the legs. […] You can get deep vein thrombosis (DVT) if you have certain medical conditions that affect how the blood clots. A blood clot in the legs can also develop if you don’t move for a long time. […] The main causes of deep vein thrombosis (DVT) are damage to a vein from surgery or inflammation and damage due to infection or injury. […] Many things can increase the risk of developing deep vein thrombosis (DVT). The more risk factors you have, the greater your risk of DVT. […] Some cancers increase substances in the blood that cause the blood to clot. Some types of cancer treatment also increase the risk of blood clots. […] Sometimes, a blood clot in a vein can occur with no identifiable risk factor. This is called an unprovoked venous thromboembolism (VTE). […] Complications of DVT can include: Pulmonary embolism (PE). PE is a potentially life-threatening complication associated with DVT. It occurs when a blood clot (thrombus) in a leg or other body area breaks free and gets stuck in a blood vessel in a lung.

• #21 The Mechanism of Oral Contraceptive (Birth Control Pill) Induced Clot or Thrombus Formation (DVT, VTE, PE)

  https://www.ebmconsult.com/articles/oral-contraceptive-clotting-factors-thrombosis-dvt-pe

  The estimated incidence of venous thromboembolism (VTE) in women of child bearing age who are not taking oral contraceptives is 1 in 10,000 per year. This is increased 3-5 fold when women of child bearing age use estrogen containing oral contraceptives. […] Estrogen containing oral contraceptives increase the plasma concentration of clotting factors II, VII, X, XII, factor VIII, and fibrinogen. […] Estrogen, like many lipophilic hormones, affects the gene transcription of various proteins. Thus, estrogen increases plasma concentrations of these clotting factors by increasing gene transcription. […] Higher doses of estrogen appear to confer a greater risk of venous thrombus formation. This can be explained by a greater degree of nuclear receptor binding and overall activation of gene transcription for these clotting factors.

• #22 Molecular mechanisms of venous thrombosis | JIR

  https://www.dovepress.com/recent-advances-on-the-molecular-mechanism-and-clinical-trials-of-veno-peer-reviewed-fulltext-article-JIR

  The main protein of plasminogen-plasminase system, plasminogen activator inhibitor-1 (PAI-1), is a significant inhibitor of tissue-type plasminogen activator (t-PA) and urokinase-type plasminogen activator (U-PA). […] Inflammation stimulates endothelial cells to release tPA and PAI-1 locally. […] The role of inflammation and inflammation-related biomarkers in cerebrovascular thrombotic disease is a subject of ongoing debate. […] Elevated levels of inflammatory factors interleukin-1 (IL-1), tissue factor (TF), xanthine oxidase (XOD) and nuclear factor kappa B (NF-B) may accelerate thrombosis. […] The NLRP3/IL-1/NF-B signaling mechanisms regulate IL-1 and tumor necrosis factor alpha (TNF-), which may be essential signs of the prethrombotic condition due to slowed blood flow, impaired vascular endothelium, and elevated tissue factor expression.

• #23 Molecular mechanisms of venous thrombosis | JIR

  https://www.dovepress.com/recent-advances-on-the-molecular-mechanism-and-clinical-trials-of-veno-peer-reviewed-fulltext-article-JIR

  The risk of venous thrombosis increases with age, but the mechanisms underlying the increased risk of thrombosis with age are not well understood. […] The transcription factor Kruppel-like Factor 2 (KLF2) is the key regulator of neutrophil activation, which can be triggered by anti-phospholipid antibodies or be lost through KLF2 gene expression. […] Therefore, it is believed that one of ways in which neutrophils encourage venous thrombosis is by forming NETs. […] The elevated levels of Fn-EDA in plasma may be an important mechanism for promoting DVT in the context of diet-induced obesity. […] Over the past few years, growing research suggest that the production of venous thrombosis also involves the immune system. […] The immune cells support the related molecules and produce specific intravascular scaffolds that promote pathogen recognition, containment, and destruction.

• #24 Molecular mechanisms of venous thrombosis | JIR

  https://www.dovepress.com/recent-advances-on-the-molecular-mechanism-and-clinical-trials-of-veno-peer-reviewed-fulltext-article-JIR

  The previous study showed IL-6, IL-8, and monocyte chemoattractant protein (MCP-1) were the independent predictors of accelerated VTE development and they concluded that systemic inflammation is a key driver of VTE risk after major trauma. […] In this review, we provide a comprehensive overview of the mechanisms underlying PAI-1, inflammatory factors, miRNA, age-related changes, neutrophil extracellular traps formation, P-selectin activation, immunological processes and extracellular vesicles (EVs) in relation to venous thrombosis.

• #25 The Critical Role of Inflammation in Deep Vein Thrombosis – Endovascular Today

  https://evtoday.com/articles/2024-july/the-critical-role-of-inflammation-in-deep-vein-thrombosis

  Inflammation significantly contributes to the development and progression of venous thrombosis. […] Endothelial cells are thought to have a role in a resting state characterized by anti-inflammatory and antithrombotic properties. Microenvironment changes can induce a shift in the endothelial cells from resting to active. During this active state, which is observed during experimental DVT, there is an increase in the expression of cell adhesion molecules like P-selectin, E-selectin, and ICAM-1, facilitating the adhesion and activation of leukocytes and platelets, promoting thrombosis. […] Once activated, the endothelial cells lead to inflammation and thrombosis. The role of inflammation should be understood as critical in determining the outcome of a DVT scenario, toward postthrombotic fibrosis or thrombus recanalization.

• #26 DVT – Blood Clots – The RANE Center for Venous and Lymphatic Diseases at St. Dominic’s :: Vascular & Endovascular Surgery :: Seshadri Raju, M.D., F.A.C.S., Vascular Surgeon

  https://www.theranecenter.com/general-information-on-commonly-performed-surgical-procedures/dvt-blood-clots/

  Some Thrombophilia defects are more serious than others, so the risk of blood clot varies according to the type of defect. […] The risk of DVT clots is much higher in certain other forms of molecular deficiency. […] A DVT clot causes damage and scarring of the veins. This scarring produces narrowing of the veins. This in turn slows the movement of blood in veins causing stasis. Thus a vicious cycle is produced where a previous DVT clot increases the risk of future DVT clots. […] For these reasons blood clots should be removed as soon as possible. […] The treatment for blood clots in the deep veins of the leg is administration of blood thinners. […] In contrast, blood thinners do not dissolve DVT clots that are still in place in the deep veins of the leg. […] Eventually, most DVT clots in the deep veins of the leg turn into scar tissue that narrows the vein. […] IVC filters should be removed as soon as they have served their purpose. […] The is known as Post thrombotic syndrome which literally means a symptom condition that develops after a deep vein DVT clot.

• #27 Deep Vein Thrombosis (DVT) – Venous Thromboembolism (VTE) – Cardiovascular Diseases – Diseases – McMaster Textbook of Internal Medicine

  https://empendium.com/mcmtextbook/chapter/B31.II.2.33.1.

  Deep vein thrombosis (DVT) refers to the development of a thrombus in the deep venous system (below the deep fascia) of the lower extremities or, less commonly, the pelvis or upper extremities. Formation of a thrombus in the vein depends on the presence of 1 factor referred to as the Virchow triad, which includes the following: […] 1) Impaired blood flow (eg, due to immobilization of the limb or compression of the veins). […] 2) Procoagulant activity prevailing over the effects of coagulation inhibitors and fibrinolytic factors (congenital or acquired thrombophilia). […] 3) A damaged vascular wall (eg, as a result of injury during surgical procedures on a limb). […] In approximately two-thirds of patients treated for DVT, the thrombus undergoes organization and the affected vein is partially recanalized (a total dissolution of the thrombus occurs only in a third of patients). This leads to chronic venous insufficiency and postthrombotic syndrome: organization of the thrombus results in damage to the venous valves, retrograde flow of venous blood, and eventually in venous hypertension.

• #28 The Critical Role of Inflammation in Deep Vein Thrombosis – Endovascular Today

  https://evtoday.com/articles/2024-july/the-critical-role-of-inflammation-in-deep-vein-thrombosis

  Venous thrombosis results from the interrelation of many complex pathologic mechanisms. Understanding basic physiology and the progressive changes into a disease state is important for researchers and clinical practitioners to advance toward new pharmacologic targets and treatments, including device development. During deep vein thrombosis (DVT), a thrombus is formed and grows inside the deep veins; these thrombi can block circulation partially or completely, and swelling, redness, warmth, and pain are part of the clinical presentation. There are many mechanisms involved in the development of the disease. Virchow’s triad reflects the participation of the endothelium (vein wall), venous stasis, and hypercoagulability (on the lumen side). Recent discoveries highlight the role of inflammation induced by endothelial activation, which is one of the triad components.

• #29 Deep Vein Thrombosis (DVT): Symptoms, Causes, and More

  https://www.healthline.com/health/deep-venous-thrombosis

  If blood thinners don’t work or the DVT is severe, your doctor might use thrombolytic drugs. […] Compression stockings can prevent swelling and might lower your chance of developing clots. […] If you cannot take blood thinners, you might need a filter inside the large abdominal vein called the vena cava. This treatment helps prevent pulmonary embolisms by stopping clots from entering your lungs. […] Your doctor may suggest surgery to remove a DVT clot in your arm or leg. This is typically only recommended with very large blood clots or clots that cause serious issues, like tissue damage. […] DVT is a serious condition that could be life threatening. Diagnosis can often be difficult, as many people with DVT do not experience symptoms. […] Moving regularly, wearing compression stockings, and adopting a balanced diet are key ways to manage DVT risk.

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