Results An emergency cardioversion ratio was 28.1% with lanatoside within 24 h with a satisfactory control of ventricular rate, as compared with that of 62.2% with propafenone ( P < 0.01) with unsatisfactory control of ventricular rate. 普罗帕酮24h内急诊转复率62.2%,心室率控制满意,两者疗效比较差异有显著性(P<0.01);