First diagnosed paroxysm of atrial fibrillation during catheter ablation for Wolf–Parkinson–White syndrome

Central Military Clinical Hospital named after P.V. Mandryk of the Ministry of Defense of Russia, Moscow, Russia The Wolff–Parkinson–White (WPW) syndrome is a relatively rare arrhythmia compared to atrial fibrillation and atrial flutter; however, after excluding atrial fibrillation and flutter from the statistics, pre-excitation syndromes of the ventricular myocardium account for 25% of supraventricular tachycardias. Due to the characteristic clinical picture on the ECG, which is often sufficient for diagnosing the condition, patients with WPW syndrome are quickly referred to specialized hospitals for further treatment. Currently, catheter ablation is the primary method of treating WPW syndrome. This article presents a clinical case of intraoperative induction of atrial fibrillation with frequent antegrade conduction to the ventricular myocardium via an accessory atrioventricular connection.