近年来,有关心脏性猝死的研究已取得了很大进展。心脏性猝死以冠状血管疾病引起者最多见,而引起猝死的直接原因则绝大多数为心室颤动。后者复发率很高,纵然一次发作幸免死亡,但以后仍会复发。此类心室颤动常由心电的不稳定所致,患者心功能可保持良好,而且大多数并无或不曾有过心肌梗塞。如能及时地正确治疗,这类心室颤动引起的猝死是可以避免的。由于心脏性猝死大多数发生在医院外,因此,曾作了很多努力如流动监护系统、救护车急救服务、现场抢救训练等以图降低其死亡率,但收效甚微。目前,长期应用抗心律失常药物仍是预防和治疗严重心律失常最常用的方法,可通过运动试验及电生理研究测试药物的疗 In recent years, research on sudden cardiac death has made great progress. Sudden death of the heart caused by coronary vascular disease is the most common cause of sudden death caused by the vast majority of ventricular fibrillation. The latter has a high recurrence rate, and even if one episode survives the death, it will recur later. Such ventricular fibrillation often caused by unstable ECG, patients with cardiac function can be maintained well, and most have no or no myocardial infarction. If timely and correct treatment, such sudden death caused by ventricular fibrillation can be avoided. Since the majority of sudden cardiac death occurs outside the hospital, many efforts have been made to reduce its mortality rate, such as mobile monitoring system, emergency ambulance service and on-site rescue training, with little success. At present, long-term use of anti-arrhythmic drugs is still the most commonly used method of prevention and treatment of severe arrhythmia, the drug therapy can be tested by exercise test and electrophysiological studies