Abstract 12516: Changes of Electrophysiological Data Through the Life in the Preexcitation Syndrome

TL;DRAbstract

Background: The number of accessory pathway (AP) ablations has dramatically increased and the natural follow-up of Wolff-Parkinson White syndrome (WPW) becomes not possible. Changes of electrophysiological data were reported. The purpose of the study was to report the clinical and electrophysiological data of patients with a WPW, studied within 1 to 20 years of one another to evaluate the changes of the data. Methods: 2 baseline EPS were performed within 1 to 20 years of one another (mean 9 y ± 4) in 62 patients, 37 males and 25 females, aged initially from 10 to 67 y (31±15), with a patent WPW. First electrophysiological study (EPS) was indicated for syncope (n=7), atrioventricular reentrant tachycardias (AVRT) (n=34), atrial fibrillation (AF) (n=5) or for asymptomatic preexcitation (n= 16). The protocol was similar: the higher rate conducted through AP was measured and programmed atrial stimulation with 1 and 2 ES performed in control state (CS) and after isoproterenol. Results: At 2

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