Hemostasis is the process that maintains the integrity of aclosed, high-pressure circulatory system after vascular damage.Vessel-wall injury and the extravasation of blood from the circulationrapidly initiate events in the vessel wall and in blood thatseal the breach. Circulating platelets are recruited to thesite of injury, where they become a major component of the developingthrombus; blood coagulation, initiated by tissue factor, culminatesin the generation of thrombin and fibrin. These events occurconcomitantly (Figure 1A; also see Video, available with thefull text of this article at www.nejm.org), and under normalconditions, . . . [Full Text of this Article]
Formation of a Platelet Thrombus
Two Independent Pathways to Platelet Activation
Propagation of the Platelet Thrombus
Blood Coagulation
Tissue Factor
Thrombin and Fibrin
Tissue Factor and Microparticles in Thrombotic Disorders
Hemostatic Microparticles versus Pathologic Microparticles
Cancer-Associated Thrombosis
Paroxysmal Nocturnal Hemoglobinuria
Atherothrombosis
New Strategies for Antithrombotic Agents
Source Information
From the Division of Hemostasis and Thrombosis, Beth Israel Deaconess Medical Center, and Harvard Medical School — both in Boston.
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