Left anterior branch block
Left anterior hemiblock (LAH) is also called left anterior hemiblock. The left anterior branch is the slender branch of the left bundle branch, which is superficial in the position of the ventricular septum and is prone to ischemic injury. The left anterior branch is the slender branch of the left bundle branch, which is superficial in the position of the ventricular septum and is prone to ischemic injury. It is most common in coronary heart disease, accounting for about 75%.
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