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.
This EKG shows sinus rhythm, with a some what wide QRS and a right axis deviation. The S1 Q3 pattern suggest an isolated left posterior fasicular block. One should also consider right ventricular hypertrophy but there is no sign of right atrial abnormality, and his echocardiogram was normal.
