近来的资料证明,心性猝死(SCD)在晨间增加,提示可能由于直立姿势而交感神经活动增强所致。本文通过调查β阻滞剂心脏病发作试验研究(BHAT)人群中院外 SCD 发生时间,探讨安慰剂组晨间猝死率是否增加以及β阻滞剂能否预防晨间 SCD。BHAT 是通过随机、双盲及安慰剂对照方法, Recent data show that sudden cardiac death (SCD) increased during the morning, suggesting that may be due to the upright posture and sympathetic activity increased. In this study, by investigating the out-of-hospital onset of SCD in the Beta Blocker Heart Attack Study Study (BHAT) population, we investigated whether sudden death in the morning in the placebo group was increased and whether β blockers prevented morning SCD. BHAT is a randomized, double-blind and placebo-controlled method,