Q-T 延长综合征(LQTS)是心电图出现复极异常的一种罕见疾病,除 Q-T 延长外,T 波可有切迹,多发于青年人,常伴发晕厥和致死性室性心律失常。其病因不明,一般呈常染色体显性遗传;但伴耳聋者则按常染色体隐性方式遗传。心脏虽无解剖异常, In addition to Q-T prolongation, T wave may have notch, often in young people, often accompanied by syncope and fatal ventricular arrhythmias. Q-T prolongation syndrome (LQTS) is a rare disease of electrocardiogram with repolarization abnormalities. The etiology is unknown, the general autosomal dominant inheritance; but with deafness were autosomal recessive manner genetic. Although no abnormal heart anatomy,