But prolonged repolarization z' may increase the risk of torsades de point a type of tachycardia caused by after depolarizations.

但是延长了的复极化 z’可能会增加由去极化后引起的尖端扭转型室速的风险。

As hypokalemia becomes more severe especially in patients with other heart conditions, the inward current may exceed the outward current resulting in early after depolarization and consequently extra heartbeats prolonged repolarization may also promote re-entrant arrhythmias.

随着低钾血症变得更加严重，尤其是其他心脏病患者，内向电流可能会超过外向电流，从而导致早期去极化后，因此，额外的心跳延长复极也可能促进折返性心律失常。