McGill Case 20

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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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The recording shows atrial fibrillation. The QRS is wide (> 120 ms.) has a left axis deviation and a large R' in V1 with a S in I and V6. The EKG shows a complete right bundle branch block and a left anterior fasicular block.