慢性充血性心力衰竭患者QT离散度与心脏性猝死关系的研究

Study on the Relationship of QT Dispersion to Sudden Cardiac Death in Congestive Heart Failure Patients

通过对３６例慢性充血性心力衰竭（ＣＨＦ）患者ＱＴ离散度（ＱＴｄ）测定，显示心脏性猝死（ＳＣＤ）组ＱＴｄ明显高于进行性心力衰竭死亡及存活组（Ｐ＜０．００１）。伴与不伴室性快速心律失常的ＳＣＤ患者之间的ＱＴｄ无显著差异。ＱＴｄ≥８０ｍｓ预测ＣＨＦ患者ＳＣＤ敏感性７１．２％，特异性８８．３％，阳性预测值８３．６％。

Through measuring the QT dispersion(QTd) of 36 cases with congestive heart failure(CHF) it showed that QTd of sudden cardiac death(SCD) is greatly higher than that of heart failure death and survival group( P <0.001).There was no significant difference between SCD patients with or without rapid arrhythmia.When QTd ≥80 ms,the sensitivity of SCD of CHF patient was estimated as 71.2%,specificity was 88.3%,positive predictive value was 83.6%.It can be seen from the data mentioned above that QTd measure provide us a useful method of non intrusive electric cardiology.