-Supraventricular tachycardia (SVT) is the most common heart rhythm abnormality in children. -Wolff-Parkinson-White syndrome (WPW) is a type of SVT that is associated with sudden death. -Risk factors and treatment decisions to reduce sudden death in Wolff-Parkinson-White syndrome are based on very limited information. WPW is common. It occurs in about 1-3/1,000. This is likely an underestimate as there may be children with WPW who have no symptoms and have […]