血栓(thrombus)是血成分在循环血液中凝聚后所形成的一种半固体凝块。血栓的形成可导致急性心肌梗死、中风、肺栓塞等心、脑、肺循环的疾患,威胁人们的生命,其发病率和死亡率在中老年中占有相当大的比例。抗凝疗法是一种阻止血液凝固,防治血栓栓塞疾病的方法。影响凝血酶和凝血因子形成,用于抗凝疗法的药物即为抗凝药,其中最常用的是肝素和口服抗凝剂。抗凝药物防治心脑血管疾病的 Thrombus (thrombus) is a semi-solid clot formed when blood components are condensed in circulating blood. The formation of thrombus can lead to acute myocardial infarction, stroke, pulmonary embolism and other heart, brain, pulmonary circulation disease, threatening people's lives, the morbidity and mortality in middle-aged and elderly occupy a large proportion. Anticoagulant therapy is a method of preventing blood clotting and preventing thromboembolic disease. Affect the formation of thrombin and clotting factors, the anticoagulant drugs are anticoagulants, the most commonly used of which is heparin and oral anticoagulants. Anticoagulant drugs to prevent cardiovascular disease