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.
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.
