心源性猝死(sudden cardiac death,SCD)是指由于心脏病发作而导致的出乎意料的突然死亡[1]。各种心脏病都可导致猝死,其中尤以冠心病居多,其病理基础为冠状动脉阻塞、痉挛,或二者同时发生,引起心肌供血不足或心律失常[2]。由于绝大多数SCD发生在医院外,难以得到快速、有效的治疗,所以,SCD发病急、死亡率高已成为国内外医疗保健难题之一。为此,对SCD作临床性分析,有益于指导临床治疗、 Sudden cardiac death (SCD) refers to an unexpected sudden death from a heart attack [1]. A variety of heart diseases can lead to sudden death, especially coronary heart disease mostly, its pathological basis for coronary artery obstruction, spasm, or both at the same time, causing myocardial insufficiency or arrhythmia [2]. As the vast majority of SCD occurs outside the hospital, it is difficult to obtain rapid and effective treatment. Therefore, the rapid onset of SCD and high mortality have become one of the problems of medical care both at home and abroad. To this end, for the clinical analysis of SCD, is conducive to guiding clinical treatment,