TABLE I.
Process of high-shear thrombus formation. Reproduced with permission from Annu. Rev. Biomed. Eng. 19, 415–433 (2017). Copyright 2017 Annual Reviews.
1 | Regions of stenosis induce high wall shear rates. |
2 | von Willebrand factor (vWF) attaches to the wall by adsorption onto collagen or artificial surfaces and unfolds under high-shear conditions. |
3 | Shear-enhanced diffusivity transports platelets to the surface and induces a high wall concentration of vWF and platelets by margination from the jostling red blood cells. |
4 | Circulating platelets that are not yet activated bind to surface-bound vWF. |
5 | Activation of adhered platelets release large amounts of vWF locally and activates integrin αIIb β3 on the platelets for firm adhesion. |
6 | vWF nets form on the growing thrombus as platelets are continually captured and activated. |
7 | The vWF nets rapidly capture billions of platelets that accumulate to form a large thrombus, with possible vessel occlusion or embolization. |