McGill Case 354
This case report is kindly provided by Michael Rosengarten from McGill and is part of the McGill Cases. These cases come from the McGill EKG World Encyclopedia.
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This is a regular rhythm at a rate of 65/min. The PR interval is 400 ms, the QRS is approximately 110 MS, and there are Qs waves in I, II, aVL, and poor R waves in the precordial leads. This is sinus rhythm with a marked first degree heart block. The QRS suggests an extensive anterior/latteral myocardial infarction.