Magnetic resonance imaging versus computed tomography for characterization of pulmonary vein morphology before radiofrequency catheter ablation of atrial fibrillation.

The accurate assessment of pulmonary vein (PV) anatomy is important in planning radiofrequency catheter ablation (RFCA) of atrial fibrillation (AF). The aim of the present study was to perform a head-to-head comparison of magnetic resonance imaging (MRI) and multislice computed tomography (CT) for the evaluation of PV morphology before RFCA of AF. Contrast-enhanced MRI (on a 1.

Intraprocedural reconstruction of the left atrium and pulmonary veins as a single navigation tool for ablation of atrial fibrillation: a feasibility, efficacy, and safety study.

Background: Pulmonary vein (PV) isolation is a technically challenging intervention. For this reason, integration of three-dimensional imaging with computed tomography (CT) or magnetic resonance imaging (MRI) in order to enhance effectiveness and safety has been widely adopted. A novel imaging approach--intraprocedural rotational angiography and reconstruction of the left atrium and PVs--is feasible and provides high anatomic accuracy.

A new approach for contrast-enhanced X-ray imaging of the left atrium and pulmonary veins for atrial fibrillation ablation: rotational angiography during adenosine-induced asystole.

Aims: Atrial fibrillation ablation is a complex procedure that requires detailed anatomic information about left atrium (LA) and pulmonary veins (PVs). The goal of this study was to test rotational angiography of the LA during adenosine-induced asystole as an imaging tool in patients undergoing atrial fibrillation ablation.

Methods And Results: Seventy patients with paroxysmal or persistent atrial fibrillation undergoing PV isolation were included.

Ectopic atrial tachycardias with early activation at His site: radiofrequency ablation through a retrograde approach.

Aims: The purpose of this study was to evaluate a retrograde approach for radiofrequency (RF) ablation of ectopic atrial tachycardias (EATs) with an early atrial activation at the His site.

Methods And Results: This study included 12 patients with EAT. During tachycardia, earliest atrial activation was recorded at the His site at a standard catheter setting.