Preexcitation syndrome

Pre-excitation is an abnormal phenomenon of atrioventricular conduction. Impulse is transmitted through the additional channel, which excites part or all of the ventricle early, causing some ventricular muscles to excite in advance. Those with pre-excitation are called pre-excitation syndrome or WPW (Wolf-Parkinson-White) syndrome, often with supraventricular paroxysmal tachycardia. Pre-excitation is a rare type of arrhythmia, and diagnosis is mainly based on electrocardiograms.