Wolff-Parkinson-White Syndrome

Wolff-Parkinson-White syndrome is a disorder of the heart's electrical system caused by an accessory pathway that conducts electrical current between the atria and the ventricles, bypassing the atrioventricular node. About 60 percent of people with this electrical abnormality develop symptoms, which can include an abnormally fast heartbeat, palpitations, shortness of breath, lightheadedness, or fainting, and rarely cardiac arrest. The most common arrhythmia associated with the syndrome is paroxysmal supraventricular tachycardia.