Wolff-Parkinson-White syndrome is a heart condition in which there is an abnormal extra electrical pathway of the heart. The condition can lead to episodes of rapid heart rate (tachycardia) and/or fainting.
Normally, electrical signals in the heart go through a certain pathway that helps the heart beat regularly. The wiring of the heart prevents extra beats from occuring and keeps the next beat from happening too soon.
In WPM, some of the heart's electrical signal goes down extra (accessory) pathway. This may cause a very rapid heart rate called superventricular tachycardia.
Symptoms of WPM are
Fainting (Syncope)
Extremely rapid heart rate (greater than 300 beats per minute)