Electrocardiographic Criteria for the Diagnosis of Left ...

(A) An ECG of a 39-year-old male with a heart rate of 68 beats/min and normal QRS amplitudes not meeting LVH criteria. (B) An ECG of the same patient 13 h later with a heart rate of 99 beats/min exhibiting rate dependent LAHB. The sum of S-wave III (19 mm) when added to S-wave V 4 (10 mm) is 29 mm, meeting the new LVH criteria. LAHB ¼ Left ... ................
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