肺栓塞(PE)是指内源性血栓堵塞肺动脉或其分支引起肺循环障碍的临床综合征。PE在西方国家属常见疾病,美国每年诊断PE的患者超过50万[1]。其病死率仅次于冠心病和肿瘤,占人口死因构成第3位。中国目前还没有PE病例的流行病学资料。因PE的临床症状体征的非特异性给诊断带来一定的 Pulmonary Embolism (PE) is a clinical syndrome where endogenous thrombus blocks the pulmonary artery or its branches and causes pulmonary circulatory disorders. PE is a common disease in Western countries, the United States every year more than 500,000 patients diagnosed with PE [1]. Its mortality rate is second only to coronary heart disease and cancer, accounting for the third cause of death of the population. There is currently no epidemiological data on PE in China. Because of the clinical symptoms of PE non-specific to bring some diagnosis