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小剂量的大蒜素，使心电图Q—T延长，加大剂量产生R—R及P—R延长，最终因窦性停博、Ⅲ°房室传导阻滞而动物死亡。右房收缩力，小剂量大蒜素能增强，大剂量产生抑制。大蒜素对窦性心率抑制有量效关系。
Low-dose allicin prolonged ECG Q-T, increased the dose to produce R-R and P-R prolongation, and eventually died of animal death due to sinus arrest and III° atrioventricular block. Right atrial contractility, low-dose allicin can enhance, high dose inhibition. Allicin has a dose-effect relationship with inhibition of sinus rhythm.