This is termed “pre-excitation” and results in a shortened PR interval on the ECG. The combination of WPW and atrial fibrillation can potentially be fatal, especially if AV blocking agents are ...

Patients with WPW are also at an increased risk of developing AV nodal reentry tachycardias (AVNRT) which are difficult to distinguish from atrial fibrillation on ECG due to the fast ventricular ...