Comparison of left atrial dimensions in CT and echocardiography as predictors of long-term success after catheter ablation of atrial fibrillation

摘要: Left atrium (LA) size is a common predictor of ablation outcomes in atrial fibrillation (AF), but different LA diameters have not been adequately studied yet. We aimed to find the best using single-linear dimensions by computed tomography (CT) or echocardiography. Patients (n = 103, 72 males, 59 ± 9 years) undergoing AF were analyzed. diameter (LA-D) was measured transthoracic echocardiography (parasternal long axis). After 3D reconstruction CT data (EnSite Verismo, SJM, MN), maximal on coronal plane (superior-inferior, SI, and transversal, TV) sagittal (anterior-posterior, AP). Volume (LAV) rendered after appendage pulmonary vein exclusion. with persistent (n = 40) had significantly larger than those paroxysmal (n = 63). 26 ± 14 months, 31 (30 %) patients recurrence. Univariate Cox regression analysis revealed that LA-D, LA-SI, LA-TV, LAV, LAV-index (LAV/body surface area) associated Multivariate LAV strongest independent recurrence (HR = 1.011 per ml, 95 % CI 1.003–1.020, p = 0.002). LA-TV correlation (r = 0.69, p  74.5 mm predicted similarly LAV>126 ml. dilatation, especially plane, reduced long-term success catheter ablation. linear recurrence, stronger commonly used LA-D.