310 Computed Tomography Pulmonary Venogram Characteristics of Patients Undergoing Hybrid Atrial Fibrillation Ablation

Abstract

Computed tomography pulmonary venogram can provide anatomic information of the left atrium, left atrial appendage and pulmonary veins that assist in planning radiofrequency catheter ablation for atrial fibrillation. 26 patients underwent computed tomography pulmonary venograms prior to their hybrid atrial fibrillation ablation. Left atrial abnormalities, lack of left atrial appendage opacification, pulmonary vein ostial diameters and variant anatomy were recorded. The mean pulmonary vein cross-sectional diameters were as follows:•Right superior pulmonary vein were 20.2±4.8mm x 17.8±4.3mm;•Right inferior pulmonary vein 19.6±3.9mm;•Left superior pulmonary vein 19.4±3.3mm x 16.1±2.9mm; and•Left inferior pulmonary veins 20.3±6.4mm x 16.4±3.5mm. There were 7 pulmonary vein variants. 3 patients had a common left pulmonary vein with a mean cross-sectional diameter of 33±2.6mm x 25.3±4 mm. 4 patients had right middle pulmonary veins with a mean cross-sectional diameter of 9±1.4mm x 8.5±1mm. There were no left atrial abnormalities. The left atrial appendages were well opacified. The pulmonary vein characteristics and variant anatomy were obtained. 29% of patients had variant anatomy, which is similar to the documented rates in the literature, with the most common variant being the right middle pulmonary vein.