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目的探讨心力衰竭患者的QT离散度与室性心律失常的关系。方法选择80例心力衰竭患者为观察组,45例正常者作为对照组。监测24 h长程心电图,记录QT离散度的变化,观察组按有无合并恶性室性心律失常进行分组分析,并与正常对照组比较。结果心力衰竭组QTd,QTcd均显著增加(P<0.01),合并恶性室性心律失常组的QTd,QTcd较不伴有恶性室性心律失常组的患者明显延长(P<0.05)。结论 QTd的延长与心力衰竭患者室性心律失常的发生有关,QTd可作为室性心律失常发生的一个预测指标。
Objective To investigate the relationship between QT dispersion and ventricular arrhythmia in patients with heart failure. Methods Eighty patients with heart failure were selected as the observation group and 45 normal persons as the control group. The 24 h long-range electrocardiogram was monitored and the change of QT dispersion was recorded. The observation group was divided into groups according to the presence or absence of malignant ventricular arrhythmia and compared with the normal control group. Results QTd and QTcd were significantly increased in patients with heart failure (P <0.01). QTd and QTcd in patients with malignant ventricular arrhythmia were significantly longer than those without malignant ventricular arrhythmia (P <0.05). Conclusions The prolongation of QTd is associated with the occurrence of ventricular arrhythmia in patients with heart failure. QTd can be used as a predictor of ventricular arrhythmia.