扩张型心肌病QT离散度增加与室性心动过速及心室颤动关系

Increase of QT dispersion and its relation to ventricular tachycardia and ventricular fibrilIation in patients with dilated cardiomyopathy

目的探讨扩张型心肌病患者QT离散度(QTinterval dispersion,QTd)增加与室性心动过速、心室颤动的关系。方法回顾性分析41例扩张型心肌病患者心电图QTd及JT间期离散度(JT interval dispersion,JTd)。结果扩张型心肌病患者QTd和JTd在伴室性心动过速和心室颤动者分别为(101±35)ms或(100±33)ms;而无室性心动过速或心室颤动者分别为(54±18)ms,(57±20)ms,差异有统计学意义(P<0.05,P<0.01)。结论QTd或JTd增加,室性心动过速、心室颤动发生的可能增大,表明QTd或JTd可作为早期预测室性心动过速和心室颤动的一个重要参考指标。

Objectives To analyze the relationship between increase or dispersion and its relation to ventricular taehycardia or ventrieular fibrillation in patients with dilated eardiomyopath（DCM）. Methods DCM patients＇ QT dispersion （QTd） and JT dispersion （JTd） were retrospectively studied in 41 cases. ECG analysis was performed by a single blind observer. Results QTd and JTd in DCM patients with ventricular tachycardia （VT） or ventricular fibrillation （VF）were 101±35 ms and 100±33 ms respectively, while those without VT or VF were 54±18 ms and 57±20 ms respectively（P〈 0.05）. Conclusions The long QTd or JTd may possibly relate to VT and VF in DCM patients indicating QTd or JTd possess predictive value for VT and VF.