الفهرس 
Pre excitation SyndromesOnly 14 pages are availabe for public view
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Abstract
The Wolff-Parkinson-White syndrome is a form of ventricular preexcitation in which part of the ventricular myocardium is depolarized early by one or more accessory pathways (APs) that bypass the atrioventricular (AV) node, establishing a direct link between the atrium and the ventricle. Radiofrequency catheter ablation is a safe, effective, and a curative approach, given its high effectiveness. The approach used for the electrophysiologic study and ablation depends on the location of the AP, which should be established by ECG prior to intervention. Prior knowledge of the AP location allows better planning, faster and safer procedure, as well as decreased exposure to ionizing radiation and unnecessary punctures, allowing an early choice of appropriate catheters and energy sources. Several algorithms with varying degrees of complexity and accuracy based on the analysis of QRS and delta wave morphology on the 12-lead electrocardiogram (ECG) have been proposed for accurate localization of APs. The aim of this work was to compare between three algorithms (Arruda, d’Avila and our proposed algorithm) in predicting the location of accessory pathway by 12 lead surface ECG in Wolff-Parkinson-White syndrome patients guided by successful ablation site. The study was conducted on 100 Wolff-Parkinson-White syndrome patients presented to the arrhythmia clinics and who were planned for electrophysiological study and radiofrequency ablation at cardiology departments in Tanta University Hospitals and Ain Shams University Hospitals (El-Demerdash hospital) between July 2019 and July 2021.