心电图的QT间期具有重要的临床意义，因为QT间期延长A正引起一种称为“尖端扭转型室速”的潜在致命性心律失，所以错误使用延长QT间期的药物应引起特别注意。QT间期是心室除极和复极在心电图上的表现，根据专家查，认为最有可能延长QT间药的药物依次为抗心律失常、抗精神病药； The QT interval of the ECG is of important clinical significance because the prolongation of the QT interval A is causing a potentially lethal arrhythmia called “Torsades de Pointes,” and the misuse of drugs that prolong the QT interval should receive special attention . QT interval is the performance of ventricular depolarization and repolarization on the ECG, according to experts, that the most likely to extend the QT medicine in turn anti-arrhythmia, antipsychotics;