Patients with long QTs are at an increased risk of torsade de pointe, a potentially fatal ventricular arrhythmia.

QTs患者发生尖端扭转性室性心（一种潜在的致命性室性心）的风增加。

Also an electrocardiogram might have changes such as a prolonged QT, prolonged ST segment, and arrhythmias, like torsade de pointes and atrial fibrillation.

心电图也可能会发生变化，例QT、ST段，还有心，比尖端扭转和房颤。

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

但是了的复极化 z’可能会增加由去极化后引起的尖端扭转型室速的风。

However these drugs may also cause arrhythmias, because slowly polarizations are associated with longer QT intervals and increased risk of torsades de pointes.

不过，这类药物也可能会导致心率不齐，因为极化速率减慢，会QT间期，增加尖端扭转型室速的风。