急性肺栓塞(Pul monary Embolism,PE)是由内源性或外源性栓子栓塞肺动脉及其分支导致肺循环障碍的病理生理综合征,其主要由下肢深静脉和盆腔静脉血栓迁移到肺循环引起,是常见心血管疾病,且发病率逐年升高。当并发肺出血或坏死者称为肺梗死。美国估计肺动脉栓塞年发病约65~70万, Pulmonary Embolism (PE) is a pathophysiological syndrome caused by embolization of the pulmonary artery and its branches by endogenous or exogenous emboli, which is mainly caused by the migration of deep veins of the lower extremities and pelvic venous thrombus to the pulmonary circulation, Is a common cardiovascular disease, and the incidence increased year by year. When complicated with pulmonary bleeding or necrosis are called pulmonary infarction. The United States estimates that the incidence of pulmonary embolism is about 65 to 700,000,