1 متلازمة وولف باركينسون ويت \ اعتلال النظام الكهربي بالقلب (WPW)\ — Wolff Parkinson white = Wolff-Parkinson-White syndrome (WPW) represents an abnormality of the heart's electrical system. In patients with WPW, there is an extra electrical connection between the atria (the upper chambers) and the ventricles (the lower chambers). This abnormal electrical connection can cause episodes of rapid heart rhythms called paroxysmal atrial tachycardia, preexcited tachycardia, or preexcited atrial fibrillation.