Objective To evaluate the efficacy and safety of intravenous diltiazem and cediland (lanatoside C) for treatment of rapid ventricular rate in atrial fibrillation and flutter.

• 目的观察和比较静脉注射地尔硫、毛花甙C控制快速心房颤动（房颤）和心房扑动（房扑）心室率的即时疗效及安全性。