束支传导阻滞对充血性心力衰竭复极离散度的影响

Eeffect of bundle branch block on repolarization dispersion in patients with congestive heart failure

目的探讨充血性心力衰竭合并束支传导阻滞患者Q_T离散度测定的影响因素。方法分析62例充血性心力衰竭患者合并束支传导阻滞 (Ⅰ组 )、94例不合并束支传导阻滞 (Ⅱ组 )及40例正常组 (Ⅲ组 )Q_T离散度 ,Q_T离散度以12导联体表心电图上最长与最短Q_T间期之差 (绝对离散度 )及其变异系数 (相对离散度 )计算。结果Ⅰ组Q_T、Q_Tc 间期及其绝对离散度比Ⅱ组显著延长 ,但相对离散度相近 ;J_T、J_Tc 绝对和相对离散度均显著长于Ⅱ组和Ⅲ组。结论束支传导阻滞可影响充血性心力衰竭患者复极离散度的测定 ,但其离散程度主要与潜在的基础心脏疾病相关。

Objective To investigate effect of bundle branch block on repolarization dispersion in patients with congestive heart failure. Methods Sixty _ two congestive heart failure patients with bundle branch block(groupⅠ),94 without bundle branch block(groupⅡ) and 40 normal control(groupⅢ) were studied.Repolarization dispersion were calculated by rank and coefficient of variation measured Q _ T and J _ T interval in 12 ECG. Results Q _ T and Q _ T c interval and its dispersion in terms of rank in groupⅠwere evidently longer than groupⅡ,but Q _ T and Q _ T c dispersion in terms of coefficient of variation were comparable. J _ T and J _ T c dispersion in terms both of rank and coefficient of variation in groupⅠ were significant longer than groupⅡand groupⅢ.Conclusion Bundle branch block may significantly effect repolarization dispersion,but mainly dependents on underlined heart disease.