
Mar 25, 2025
Thrombosis is the pathologic clotting of blood inside blood vessels, and is separate and distinct from hemostasis, which is a normal and restorative physiological response . A blood clot in a vessel prevents adequate blood flow, increasing the risk of heart attack or stroke. Some clots form just below the skin. Deep vein thrombosis (DVT) occurs deep in the veins, typically in the legs.