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左前分支传导阻滞(LAH)首先在1955年由Rosenbaum提出,而于1968年在临床上被广泛承认,是心脏传导系统研究的一大进展。但由于各家诊断标准不统一,易导致误诊或漏诊,特别当合并心肌梗塞或并存其他传导系统异常时,更造成诊断的困难。若在心电图检查的同时运用心向量图作对照,则对诊断有一定帮助。Chung氏曾报道一例经心电图诊断为LAH,电轴左偏-55°,而心向量图检查属正常范围,可见心向量图在诊断束支传导方面有一定的优越性。本文参阅LAH的有关文献,从心电图出发结合心向量图及个人点滴体会阐述LAH的诊断问题,以供临床工作者参考。
Left anterior branch block (LAH) was first proposed by Rosenbaum in 1955, and was widely recognized clinically in 1968 as a major advancement in cardiac conduction system research. However, due to various diagnostic criteria are not uniform, easily lead to misdiagnosis or missed diagnosis, especially when combined with myocardial infarction or coexist with other conduction system abnormalities, but also caused the diagnosis of difficulties. If the use of cardiac electrocardiogram at the same time as a control map for the diagnosis of some help. Chung reported a case of LAH by electrocardiogram, the left axis deviation of -55 °, while the heart vector chart examination is within the normal range, showing the cardiogram in the diagnosis of bundle branch conduction has some advantages. This article refers to the relevant literature LAH, starting from the ECG combined with the heart vector diagram and personal bit by bit experience to explain the diagnosis of LAH for clinical reference.