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1.长QT综合征的诊断标准长QT综合征(Long QT syndrome,LQTS)指具有心电图上QT间期延长,T波异常,易产生室性心律失常,尤其是尖端扭转型室速(TdP),晕厥和猝死的一组综合征。LQTS可分为获得性和遗传性。获得性LQTS较为常见,主要由药物所致,也可由电解质紊乱(低钾,低镁)或其他疾病引起。临床上见到的TdP大多产生于获得性LQTS。一旦去除病因,QT间期可恢复正常。因此,治疗获得性LQTS和预防猝死的关键在于及时诊断和去除引起QT间期延长的继发原因。遗传性LQTS的发病率约略为1:2000,是近20年来研究最火最为透彻的一类遗传性心律失常。在
1. Long QT syndrome diagnostic criteria Long QT syndrome (Long QT syndrome, LQTS) refers to the ECG QT prolongation, T wave abnormalities, easy to produce ventricular arrhythmias, especially the torsades de pointes (TdP) , A group of syncope and sudden death syndrome. LQTS can be divided into acquired and hereditary. Acquired LQTS is more common, mainly caused by drugs, but also by electrolyte imbalance (hypokalemia, low magnesium) or other diseases. Clinically seen TdP mostly produced in acquired LQTS. Once removed to cause, QT interval can return to normal. Therefore, the key to treating acquired LQTS and preventing sudden death is the timely diagnosis and removal of the secondary cause of QT prolongation. The incidence of hereditary LQTS is about 1: 2000, which is the most thorough and hottest type of hereditary arrhythmia in nearly 20 years. in