McGill Case 137

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. Previous Case: McGill Case 136 | Next Case: McGill Case 138

This is a 12 lead electrocardiogram from a 70 year old man with aortic stenosis who was implanted with a Medtronic Model 5983 Myrel VVI.O pacemaker (which paces at 72/min. when new). The patient is being evaluated in the pacemaker clinic for a possible upgrade to a dual chamber pacemaker.