A condition that is caused by an abnormality in the electrical system of the heart, which normally tells the heart muscle when to contract. Abbreviated WPW syndrome. In WPW syndrome there is an extra electrical connection inside the heart that acts as a short circuit, causing the heart to beat too rapidly and sometimes in an irregular manner. WPW s [..]

Condition in which there is an extra electrical pathway between the atria and ventricles; a cause of episodic rapid heartbeat.

A form of pre-excitation characterized by a short PR interval and a long QRS interval with a delta wave.

A preexcitation syndrome caused by the presence of an abnormal accessory electrical conduction pathway (the bundle of Kent) between the atria and the ventricles.