Pre-Excitation Syndromes
Definition
Pre-excitation syndromes refer to a subset of SVTs mediated by an accessory pathway which can lead to ventricular pre-excitation.
AV Re-Entrant Tachycardia (AVRT)
Re-entrant loop in antegrade via normal conduction system and retrograde via accessory pathway.
Wolff-Parkinson-White Syndrome
A congenital defect with an accessory conduction tract allowing early electrical activation of part of one ventricle.
Ventricular Tachyarrhythmias
Potential arrhythmias arising from the ventricles, causing rapid and irregular heartbeats.
AFib in WPW Patients
AFib is the index arrhythmia in up to 20% of patients with WPW syndrome, causing rapid ventricular rates and wide QRS complexes.
Treatment and Management
Treatment includes electrical cardioversion, procainamide, amiodarone, and ablation for recurrent arrhythmias.
Accessory Pathway
The pathway that bypasses the normal conduction system, causing early ventricular depolarization.