What is (are) Wolff-Parkinson-White syndrome ?
Wolff-Parkinson-White syndrome is a condition that disrupts the heart's normal rhythm (arrhythmia). People with Wolff-Parkinson-White syndrome are born with a heart abnormality that affects the coordinated movement of electrical signals through the heart.  This abnormality leads to an abnormally fast heartbeat (tachycardia) and other arrhythmias. In most cases, the cause of Wolff-Parkinson-White syndrome is unknown. A small percentage of cases are caused by mutations in the PRKAG2 gene. These cases appear to be inherited in an autosomal dominant manner.