通过心电轴左偏142例心电图(ECG)与心向量图(vCG)分析,结合临床资料,着重探讨电轴左偏与左前分支阻滞(LAH)的关系,有关LAH的诊断问题及病因。 1 对象和方法选常规ECG检查电轴在0～-90°之间者共142例(左室大、下壁心肌梗塞、预激综合征、心肌病等所致电轴左偏不包括在内),男性114例,女性28例,年龄16～75岁,平均52岁,采用美国ICR_(1001)型直描式心向量图机记录Frank体系向量图。胸前电极安置在第四肋间水平,平卧位,静息呼吸检查。 Based on the left electrocardiogram (ECG) and cardiac function (vCG) analysis of 142 cases and the clinical data, the relationship between the left axial deviation and the left anterior branch block (LAH) and the diagnosis and causes of LAH were discussed. 1 objects and methods selected routine ECG examination of the shaft between 0 ~ -90 ° in a total of 142 cases (left ventricular large, inferior wall myocardial infarction, pre-excitation syndrome, cardiomyopathy caused by left-axis not included) , 114 males and 28 females, aged from 16 to 75 years with an average of 52 years old. The vector diagram of Frank system was recorded by American ICR_ (1001) direct-view cardiac vector chart machine. Chest electrode placed in the fourth intercostal level, supine position, resting breath examination.