Abstract:The antiarrhythmic effect of Shuiqin (Oenanths javanica) injection was studied in rats. An injection of 3ml/kg iv could significantly antagonize the arrhythmias induced hy aconitine and BaCI2, and decrease the rates of ventricular fibrillation and death induced by CaCl2. The results suggest that Shuiqin injection has a significant antiarrhythmic effect on experimental rats.