Wolff-Parkinson-White Syndrome | Reference Guide

EKG Features

Rate: Normal (60-100 bpm)
Rhythm: Regular unless atrial fibrillation present
P Wave: Normal
PR Interval: Can be short (<0.12 sec)
QRS: Usually wide (> 0.12 sec)

Wolff-Parkinson-White (WPW) syndrome is a condition in which electrical signals traverse an abnormal extra electrical pathway of the heart call the bundle of Kent. This may cause the ventricles to prematurely contract. This can result in supraventricular tachycardia. WPW is a common cause of fast pediatric heart rate problems.
External Source: http://en.wikipedia.org/wiki/Wolff%E2%80%93Parkinson%E2%80%93White_syndrome
Wikipedia
External Source:http://www.nlm.nih.gov/medlineplus/ency/article/000151.htm
MedlinePlus