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目的 探讨 左束 支 传导 阻滞 合并 左 心室 肥大 心 电图 诊断 价 值。 方法 对 照 分 析 50 例左 束 支 传 导 阻 滞 合 并 左 心 室 肥 大( 观 察 组 )与 40 例 单 纯 完 全 性 左 束 支 传 导 阻 滞( 对 照 组 )的 心 电图 。 结 果 观 察 组 R +SⅢ、SⅢ>R 、Sv3>Sv2、Rv6>R v5、Sv1+V5、Sv3+R v6、Sv1+Sv6 值 与 对 照 组 相 比 差 异 有 Ⅰ Ⅱ非 常显 著 性意 义(P<0.01)。Sv3>2.7m V ,敏感 性 为 89.2% ,准 确性为 85.3% ,特异 性为 87.9% ;其 次 Sv3>Sv2,敏 感性 为 58.0% ,准 确性 为 61.0% ,特 异性 为 73.7% ; Sv3+Rv6>4.3m V,敏 感性 为 68.8% ,准 确 性 为 63.7% ,特 异 性 为 74.1% ; R v6>R v5,敏 感 性 为 52.4% ,准 确 性 为 60.4% ,特 异 性 为 70.6% 。 结 论 Sv3>2.7m V 、Sv3+R v6>4.3m V 、Sv3>Sv2、R v6>Rv5、QR S 时 间 >0.15s是 合 并左 心室 肥 大的 有效 心 电图 参数 。
Objective To investigate the diagnostic value of left bundle branch block combined with left ventricular hypertrophy. Methods 50 cases of left bundle branch block combined with left ventricular hypertrophy (observation group) and 40 cases of simple complete left bundle branch block (control group) ECG. Results There were significant differences between the observation group and the control group (P <0.01). There was significant difference between the observation group and the control group (P <0.01). Sv3> 2.7m V, the sensitivity was 89.2%, the accuracy was 85.3% and the specificity was 87.9%. The second was Sv3> Sv2, the sensitivity was 58.0% and the accuracy was 61.0 %, The specificity was 73.7%; Sv3 + Rv6> 4.3m V, the sensitivity was 68.8%, the accuracy was 63.7% and the specificity was 74.1% 52.4% with accuracy of 60.4% and specificity of 70.6%. Conclusion Sv3> 2.7mV, Sv3 + Rv6> 4.3mV, Sv3> Sv2, Rv6> Rv5, QRS time> 0.15s is a valid ECG parameters of left ventricular hypertrophy.