Abstract
The purpose of this study was to assess, in patients with ventricular preexcitation, the time dependent physiological variation of antegrade conduction properties in the AV node and in accessory pathways (Aps) as a function of autonomic tone variation induced by posture and physical effort, using noninvasive transesophageal atrial pacing. In 74 WPW patients (mean age 21.31 +/- 9.46 yrs), AV node and Kent antegrade effective refractory periods (at pacing cycle lengths 600, 400, and 320 ms), Wenckebach point, shortest preexcited RR intervals during sustained atrial fibrillation (AF) or atrial pacing, as well as the inducibility of AV reentry tachycardia (AVRT) and AF/flutter (AFL) were assessed. All measurements were carried out at rest, in supine and upright positions, and during effort. A second study was carried out approximately 3 months after the first study. The coefficient of variation (CVs) and reproducibility (CRs) were calculated. For each parameter, the differences between the mean of the two studies were not statistically significant. The CVs and CRs ranged between 0.4% and 4% and between 2 and 28 ms, respectively. AF was induced in 40 (54%) of 74 patients at the first study and in 30 (40.5%) of 74 patients at the sec...Continue Reading
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Citations
Nov 4, 2006·Expert Review of Cardiovascular Therapy·Kesava RajagopalanShubhayan Sanatani
Nov 26, 2013·Pediatric Clinics of North America·Farshad Sedaghat-Yazdi, Peter R Koenig
Apr 15, 2014·Pediatric Cardiology·M DaliliP Brugada
Apr 25, 2017·Pacing and Clinical Electrophysiology : PACE·Serhat KocaSerkan Topaloglu
May 20, 2015·Circulation·Riccardo FeniciAngela Venuti