Multiple variations of WPW conduction in one subject: Intermittent normal conduction and a false positive exercise tolerance test

Abstract

A case is presented demonstrating a number of important facets of the WPW syndrome: (1) Multiple variation in ventricular excitation; (2) intermittent normal electrocardiograms; (3) variations in the P-R interval with P-R intervals of 0.14 second in the presence of pre-excitation; (4) ST segment and T wave changes secondary to pre-excitation (this leads to a false impression of a positive exercise tolerance test); (5) conversion to normal conduction. No other arrhythmia or indication of underlying cardiac disease was noted.