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In light of the popularity and also the various nutritional and medicinal properties of  Berberis integerrima , this study was conducted to assess the influence of its aqueous extract on hemodynamic and electrocardiogram (ECG) indices of rat. Animals were divided to control (CTL), B50, B100, and B200 groups that orally received tap water, aqueous extracts of  B. integerrima  fruit 50, 100, and 200 mg/kg/day, respectively, for two weeks and on day 15, data were recorded. Different doses of barberry fruit extract had no significant effect on blood pressure, heart rate, RR interval, P duration, and Q wave amplitude of electrocardiogram. Extract administration was associated with an incremental trend in PR interval that was not statistically significant. Higher doses (100 and 200 mg/kg) of extract significantly increased the QRS interval ( P  < 0.01 versus CTL and B50 groups) but decreased the QTc interval ( P  < 0.01 versus CTL group and  P  < 0.001 versus B50 group), the JT interval, and TpTe interval ( P  < 0.001 versus CTL and B50 groups). The results suggest that high doses of barberry extract definitely prolong the depolarization phase and shorten the repolarization phase of ventricular muscle and hence induce alteration in heart electrical conductivity.

Alterations of Blood Pressure and ECG following Two-Week Consumption of Berberis integerrima Fruit Extract