Risk factors of adverse presentation as the first arrhythmia in Wolff-Parkinson-White syndrome.

Background: The aim of the study was the evaluation of the predictors of adverse presentation as first arrhythmia in Wolff-Parkinson-White syndrome; they usually affect young patients with septal or multiple accessory pathways (AP).

Methods: Our population comprised 645 patients with a preexcitation syndrome. Among them, adverse presentation (sudden death, hemodynamically not tolerated atrial fibrillation [AF]) occurred in 60 (9%) (group I).