English: What is Wolff-Parkinson-White syndrome (WPW)? WPW is a type of arrhythmia involving an accessory pathway called the bundle of Kent, which allows electrical communication between the atria and ventricles. WPW pattern describes when there are no associated symptoms, and WPW syndrome describes when there are associated arrhythmias and symptoms. This video describes the pathophysiology, clinical signs, and treatment for WPW.