QT及JT离散度对心性猝死预测价值的探讨

Investigation of the value of QT dispersion and JT dispersion in the prediction of sudden cardiac death

测定３２例心性猝死和３０例非猝死性心性死亡病人入院后的首次心电图ＱＴ离散度（ＱＴｄ）和ＪＴ离散度（ＪＴｄ），并以３０例存活病人作对照。结果显示：（１）心性猝死组ＱＴｄ、ＪＴｄ较存活组和非猝死性心性死亡组显著增大（前者Ｐ均＜０．０１，后者Ｐ均＜０．０５），而非猝死性心性死亡组与存活组ＱＴｄ、ＪＴｄ比较差异均无统计学意义。（２）在心性猝死病人中，死亡直接原因为快速性室性心律失常组（２３例）的ＱＴｄ、ＪＴｄ显著高于缓慢性心律失常组（９例）（Ｐ均＜０．０５）。提示ＱＴｄ、ＪＴｄ增大对快速性室性心律失常及由其引起的心性猝死的预测有一定意义。

The initial QT dispersion(QTd) and JT dispersion(JTd) in ECG in 32 patients died due to sudden cardiac death and 30 patients died due to other cardiac causes during hospitalization were observed and compared with those of 30 survived patients.Results:(1)The QTd and JTd in patients died due to sudden cardiac death were significantly longer than those in patients died due to other cardiac causes and survived patients,but the differences of QTd and JTd between patients died due to other cardiac causes and survived patients were not statistically significant.(2)The QTd and JTd in patients died due to sudden cardiac death with ventricular tachyarrhythmias were significantly longer than those with bradyarrhythmias.It is suggested that increase of QTd and JTd may be significant in the prediction of sudden cardiac death resulted from ventricular tachyarrhythmias.