الفهرس | Only 14 pages are availabe for public view |
Abstract trial fibrillation (AF) is the most common arrhythmia in clinical practice, accounting for approximately one-third of hospitalizations for cardiac rhythm disturbance. AF is associated with an increased long-term risk of stroke, heart failure, and all-cause mortality, especially in women. The observation that potentials arising in or near the ostia of the pulmonary veins (PV) often provoke AF, and demonstration that elimination of these foci abolished AF escalated enthusiasmfor catheter-based ablation. The technique of ablation has continued to evolve from early attempts to target individual ectopic foci within the PV to circumferential electrical isolation of the entire PV musculature. Restoration of sinus rhythm after catheter ablation forAF significantly improved left ventricular function, exercise capacity, symptoms, and quality of life (usually within the first ٣ to ٦ months), even in the presence of concurrent heart disease and when ventricular rate control was adequate before ablation. In this work we have studied the density of pulmonary vein potentials (PVPs) and their distribution in different pulmonary veins for patients with history of AF and for patients without AF history using the lasso catheter. We decided to postulate a new method to quantify the density of PVPs around the perimetry of the PV ostia. The perimetric distribution of PVPs was given a number out of ١٠ indicating the number of Lasso electrodes recording PVPs. |