McGill Case 356

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 355 | Next Case: McGill Case 357

This is a regularly irregular rhythm at a rate of about 75/minute. There are two P wave morphologies best seen in lead V1. This is atrial bigemini.