In vitro frog heart perfussionning was maked with bullfrogs.1mg/ml solution of flavonoids,extractive liquit by water,extractive liquit by ethanol in peel of orange and peel of citrus suavissima 0.1mL were added into perfussionning solution respectivily.The results were shown as follows：the cardiac contractility had been increased 101.3±49.6（%）,94.0±25.2（%）,81.4±38.5（%）,93.9±34.0（%）,150.3±117.8（%）,165.1±113.5（%）,The heart rate had been decreased 19.8±31.9（%）,22.1±22.3（%）,28.0±16.2（%）,28.5±20.8（%）,19.3±14.2（%）,23.0±24.3（%） respectivily（P0.05） .The results proved that they had effect of increasing cardiac contractility and decreasing heart rate,these medications keeping action 2～12 min.%以1mg/ml的柑橘和瓯柑橘皮类黄酮溶液、1%的柑橘皮和瓯柑橘皮水、乙醇提取液各0.1mL加入离体蛙心灌流液,结果使蛙心收缩力分别提高101.3±49.6（%）,94.0±25.2（%）,81.4±38.5（%）,93.9±34.0（%）,150.3±117.8（%）,165.1±113.5（%）;心率分别降低19.8±31.9（%）,22.1±22.3（%）,28.0±16.2（%）,28.5±20.8（%）,19.3±14.2（%）,23.0±24.3（%）（均P〈0.05）。说明柑橘和瓯柑橘类黄酮、柑橘皮和瓯柑橘皮的水、醇提取液对离体蛙心均有增强心肌收缩力和减慢心率作用,各药物的持续时间在2～12min之间。
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