端头的p层形成阳极，端头的n层是阴极，而与阴极相邻的p层形成门极（即触发极）。

The end player forms the anode, and the end n-layer is the cathode, while the player adjacent to the cathode forms the gate or trigger electrode.

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目的：观察川芎嗪对心肌细胞在缺钙-复钙损伤时发生的早期后除极及触发性心律失常的防治作用。

AIM: To observe the preventive and therapeutic effects of tetramethylpyrazine (TMP) on early afterdepolarizations (EAD) and triggered arrhythmias induced by calcium deficiency-recalcification injury.

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结论四氢巴马汀具有降低哇巴因诱发家兔在体心脏延迟后除极振幅的作用，从而减少由延迟后除极所引起的触发性室性心律失常的发生。

Conclusion THP had the effect of decreasing the amplitude of DAD of rabbit heart induced by ouabain thus reducing the chance of triggered ventricular arrhythmia induced by DAD.

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