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Q-T间期延长综合征(LQTS)表现为心电图Q-T间期延长(与心率校正后),和因室性心律紊乱而致晕厥。这种心律紊乱性质严重,可危及生命,其中以室颤最多见,有时为室性心动过速,心脏收缩无力。未经治疗的病人有73％突然死亡。Q—T间期延长综合征的病因还不清楚。有些作者认为是遗传性的,有时合并耳聋。有认为是因右心、左心交感神经传入冲动不平衡,以致心室复极速度不均匀所致。Q—T间期延长时,心脏易受激惹的时间延长,会出现R波落在T波上的现象,继而出现反折型室性心律紊乱,
Q-T prolongation syndrome (LQTS) is manifested by prolongation of the Q-T interval (after cardioversion) and syncope due to ventricular arrhythmias. This type of heart rhythm disorders are serious and can be life-threatening, with ventricular fibrillation being the most common, sometimes ventricular tachycardia, and cardiac contractions weak. 73% of untreated patients died suddenly. The etiology of the Q-T prolongation syndrome is unclear. Some authors consider hereditary and sometimes deaf. There is that because of right heart, left ventricular sympathetic afferent imbalance, resulting in ventricular repolarization caused by uneven speed. Q-T interval is prolonged, the heart susceptible to prolongation of the time, there will be R wave in the T wave phenomenon, followed by a reversal of ventricular arrhythmias,