If the QRS complex is widened and downwardly deflected in lead V1, a left bundle branch block is present. If the QRS complex is widened and upwardly deflected in lead V1, a right bundle branch ...
Recent research has focused on understanding the implications of different types of bundle branch blocks—specifically left bundle branch block (LBBB) and right bundle branch block (RBBB)—on ...
However, unlike in the presence of a left bundle branch block, myocardial ischemia and infarction can easily be detected on ECG when a RBBB is present (see anterior and inferior wall MI examples).
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