Abstract:Objective: To compare the efficacy and clinical features of Buchang Wenxin granule and propafenone in the treatment of premature beat. Method: One hundred and seven patients with premature beats (supraventricular SV, n=52;ventricular V, n=55)randomly were divided into Wenxin granule group(W group, n=62)and propafenone group(P group, n=45),the patients in W group were given Buchang Wenxin Granule 9 g·d-1, 3/d, the patients inP group were given propafenone 150 mg·d-1, 3/d. 4 weeks later, all patients were evaluated by 12-lead simultaneous body surface electrocardiogram and 24 hours ambulatory Holter, respectively compares the percentage of reduced premature beat, 24 h average heart rate, the slowest heart rate, QTcd before and after treatment. Result: Wenxin Granule in therapeutic SV,V are respectively 73.53% and 78.57%, the total efficiency is 75.81%, have no significantly difference compared with propafenone; the 24 h average heart rate and the slowest heart rate of W group had not decreased significantly before and after treatment(77.67±5.86) bpm vs (77.42±4.99) bpm, (60.89±5.40) bpm vs (60.55±4.71) bpm; while P group had decreased significantly before and after treatment(78.51±5.42) bpm vs (76.96±5.57) bpm (P<0.05),(61.31±5.69) bpm vs (58.53±4.80) bpm (P<0.05). Wenxin rranule also can reduce the QTcd of patients with Diabetes mellitus(DM) and coronary heart disease(CHD). Conclusion: Buchang Wenxin granule is effective for treating premature beats, suitable for the patients with slower heart rate,DM,CHD.