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Venous Thrombosis I: Introduction01:30

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Venous thrombosis, the most common disorder of the veins, involves the formation of a thrombus or blood clot associated with vein inflammation. It can be classified as either superficial vein thrombosis or deep vein thrombosis.Superficial Vein Thrombosis: This involves the formation of a thrombus in a superficial vein, usually the greater or lesser saphenous vein. Though less severe than deep vein thrombosis (DVT), SVT can lead to complications if untreated.Deep Vein Thrombosis (DVT): This...
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Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...
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After a fibrin clot is formed, the next step is clot retraction, a vital process facilitated by platelet contractile proteins, such as actin and myosin. These proteins pull the fibrin strands closer together and condense the clot. This action reduces the size of the clot, creating a smaller, denser structure that effectively seals off the damaged vessel. Clot retraction consolidates the clot and helps with wound healing by bringing the edges of the damaged blood vessel closer together.
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The platelet phase, the second stage of hemostasis, commences around 15-20 seconds after an injury. It follows and overlaps with the vascular phase, during which blood vessels constrict to minimize blood loss.
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Blood clotting or coagulation involves extrinsic and intrinsic pathways, which ultimately merge into the common pathway, forming a fibrin clot.
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Updated: Mar 3, 2026

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Thrombus Formation at High Shear Rates.

Lauren D C Casa1, David N Ku1

  • 1George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332; email: lauren.dc.casa@gmail.com , david.ku@me.gatech.edu.

Annual Review of Biomedical Engineering
|April 26, 2017
PubMed
Summary

High-shear thrombosis, crucial in heart attack and stroke, involves von Willebrand factor (vWF) and platelets. Understanding this process aids in predicting arterial thrombosis risk and improving treatments.

Keywords:
computational modelinghigh shearplateletsshear ratethrombosisvon Willebrand factor

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Area of Science:

  • Cardiovascular Science
  • Biofluid Mechanics
  • Hematology

Background:

  • Arterial thrombosis, a key factor in myocardial infarction and ischemic stroke, results from thrombus formation under high shear rates.
  • High-shear thrombus development differs significantly from coagulation in stagnant blood, relying heavily on von Willebrand factor (vWF) and platelets.
  • Hemodynamics critically influences all stages of thrombus formation, including vWF binding, platelet adhesion, activation, and growth.

Purpose of the Study:

  • To highlight the significance of high-shear thrombosis in arterial occlusive diseases.
  • To emphasize the roles of von Willebrand factor (vWF), platelets, and hemodynamics in high-shear thrombus formation.
  • To underscore the potential of point-of-care testing and computational modeling for predicting and managing high-shear thrombosis.

Main Methods:

  • Review of existing literature on arterial thrombosis, biofluid mechanics, and hematology.
  • Analysis of the mechanisms involved in thrombus formation under high shear conditions.
  • Discussion of the implications of hemodynamics on vWF and platelet interactions.

Main Results:

  • High-shear thrombus formation is primarily mediated by von Willebrand factor (vWF) and platelets.
  • Hemodynamic forces significantly impact vWF binding, platelet adhesion, activation, and thrombus propagation.
  • The distinct nature of high-shear thrombosis necessitates specialized approaches for prediction and treatment.

Conclusions:

  • Accurate prediction of high-shear thrombosis is essential for managing cardiovascular and cerebrovascular diseases.
  • Future research focusing on shear-dependent mechanisms, point-of-care diagnostics, and computational modeling is crucial.
  • Improved understanding will lead to better patient risk stratification, targeted therapies, and safer blood-contacting medical devices.