Does acute pulmonary vein stenosis secondary to edema on immediate post ablation procedure CMR increase risk for development of chronic pulmonary vein stenosis

Background From January, 2010 to September, 2011, 224 patients who underwent pulmonary vein isolation and debulking of the septal and posterior walls of the left atrium as part of RFA procedure for atrial fibrillation were imaged on a 3 Tesla MR scanner (Verio, Siemens Healthcare). Time interval between the conclusion of ablation procedure and placing the patient in the scanner was typically less than one hour. The MR protocol included double inversion recovery T2-weighted TSE, contrast enhanced MR angiography (Multihance, 0.1 mmol/kg) and 3D late gadolinium enhancement (LGE) scans.