Abstract
A not infrequent problem in the interpretation of electrocardiograms is the presence of a QS pattern in leads II, III, and aVF. At times, these scalar leads may show an embryonic “r” wave preceding the deep negative complexes. The differential diagnosis of such a finding should include: (1) inferior wall myocardial infarction; (2) coexisting inferior wall myocardial infarction and left anterior hemiblock; (3) isolated left anterior hemiblock.
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