McGill Case 204

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 203 | Next Case: McGill Case 205

The recording shows sinus rhythm. The remarkable finding is the short PR interval (<120 ms) and the slurred upstroke of the QRS. This is best seen in leads I and aVL, V2 to V6. Of interest is that the delta wave is negative in the inferior leads and gives the false impression of an inferior wall myocardial infarction. This tracing show WPW ventricular pre-excitation.