It's also important to obtain an electrocardiogram, which typically shows a prolonged QT interval, appearance of a U wave, and atrial or ventricular tachyarrhythmias.

心电图也很重要，典型表现出长QT间期，出现U波，以及房速或室速性心律失常。

When a new wave is present, it is included in the QT interval.

当出现新波时，它包含在QT间期中。

These include flattening or inversion of T wave, increasingly prominent U wave, ST segment depression and prolonged QT interval.

其中包括T波变平或倒置，U波逐渐突出，ST段压低，QT间期延长。

Effects of hypocalcemia on cardiac function include long QT interval due to prolonged ST segment, congestive heart failure, and hypotension.

ST段延长引起的QT间期延长、充血性心力衰竭和低血压。

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，会延长QT间期，增加尖端扭转型室速的风险。

It's also important to get an electrocardiogram, which typically shows tall, peaked T waves with a narrow base best seen in the precordial leads V1 through V6, as well as a shortened QT interval, and ST-segment depression.

做心电图检查也十分重要，一般情况下显示高、尖、窄基底T波，在心前区V1到V6导联最容易见到，同时QT间隙长度变短，ST段压低。