慢性心衰并低钾血症QT离散度与室性心律失常的关系

Correlation between QT dispersion and ventricular arrhythmia in patients with chronic heart failure complicated hypokalemia

目的 :了解心衰并低血钾时校正 QT离散度 (QTcd)与室性心律失常的关系。方法 :分别测量健康对照组 ,单纯心衰组、心衰并低血钾组及其血钾纠正后的 QTcd,并进行比较。同时对各组室性心律失常发生率进行比较。结果 :心衰并低血钾组 QTcd及室性心律失常发生率明显高于血钾纠正后及单纯心衰组的 (P<0 .0 5～ 0 .0 1)。结论

Objective:To explore the correlation between correlated QT dispersion(QTcd)and ventricular arrhythmia in patients with chronic heart failure(CHF) complicated hypokalemia.Methods:The QTcd of normal control group, CHF group, CHF complicated hypokalemia group (before and after hypokalemia was correlated) was measured and compared, meanwhile incidence rate of ventricular arrhythmia in each group was compared. Results:QTcd and incidence rate of ventricular arrhythmia of CHF complicated hypokalemia group higher than that of hypokalemia was correlated and pure CHF group ( P <0.05～<0.01). Conclusion:QTcd may be regarded as index of predicating ventricular arrhythmia in patients with chronic heart failure complicated hypokalemia