<unk>  is a condition in which the ventricles of heart depolarize earlier than expected via some accessory pathway conduction, leading to a<unk> mature contraction. Normally, atria and ventricles are interconnected with each other via the AV node (atrioventricular node). However, in all the<unk> s, an accessory pathway is<unk> sent that conducts impulses to ventricles besides the AV node. The accessory pathway passes the electrical impulses to the ventricles before the normal impulse of depolarization passes through the AV node. The phenomenon of depolarizing ventricles through the accessory pathway earlier than the usual depolarization is supposed to happen through the AV node is referred to as "Pre-<unk> ". WPW<unk>  was described in 1930 and named after John Parkinson, Paul Dudley White, and Louis Wolff. The accessory pathways are named depending upon the regions of atria and ventricles they are connecting such as Bundle of His, Mahaim fibers, and James fibers. The typical ECG findings associated with WPW<unk>  are shortened PR interval, widened QRS complex and Delta wave which is a slurring in the upstroke of QRS complex due to<unk><unk>  of ventricles via the accessory pathway. ECG findings along with symptomatic tachyarrhythmias are referred to as Wolff-Parkinson-White<unk> . Although it is more common in adults, males have an incidence rate of 0.1-0.3 %, WPW can be considered as a congenital anomaly in some cases where it is usually<unk> sent since the birth and in others, it is considered as a developmental anomaly. Studies have proven its lower<unk> valence in children aged between 6-13 than those in the age group of 14-15 years of age. Hemodynamically unstable patients should be managed with a direct cardioversion. For the stable patients, medical management should be used first before using acceptable options of catheter ablation or surgical intervention. Although catheter ablation has widely replaced the surgical option, as it is a less invasive technique with better outcomes, in cases where catheter ablation cannot be done or doesn't prove to be effective, the surgical option is worth considering with a curative rate of nearly 100%.
Pre-excitation syndrome
Runaway pacemaker syndrome
Fascicular VT
Torsades de pointes
Pacemaker syndrome
Pacemaker mediated tachycardia
AV reentrant tachycardia
Atrioventricular dissociation