肺动脉栓塞(pulmonary embolism,PE)是指内源性或外源性栓子堵塞肺动脉和(或)其分支引起肺循环障碍的临床和病理生理综合征,是一种常见的致死性急症,具有发病率高、误诊率高、病死率高的特点,未经治疗者病死率为 Pulmonary embolism (PE) is a clinical and pathophysiological syndrome characterized by endogenous or extrinsic emboli blocking the pulmonary arteries and / or its branches that contribute to pulmonary circulatory disorders and is a common fatal emergency with an incidence High, high rate of misdiagnosis, high mortality, mortality was untreated