MR evaluation of pulmonary vein diameter reduction after radiofrequency catheter ablation of atrial fibrillation

Abstract

Fifty consecutive patients aged 52±12 years suffering from drug refractory atrial fibrillation (AF) underwent baseline and post-ablation MR angiography (MRA) at a mean follow-up of 4±3.5 months. Pulmonary vein (PV) disconnection was performed with a maximum energy delivery of 30 W. MRA allowed a two-plane measurement of each PV ostium. After ablation, no significant stenosis was observed, and only 1/194 (0.5%) and 3/194 (2%) PVs had a diameter reduction of 31–40% in the coronal and axial planes, respectively. There was a significant overall post-procedural PV narrowing of 4.9% in the coronal plane and 6.5% in the axial plane (P=ns between both planes). MRA is an efficient technique that can be used in pre- and postoperative evaluation of AF patients. Using a maximal power delivery limited to 30 W, no significant PV stenosis was observed at mid-term follow-up. Late PV anatomical assessment is needed to confirm these results on long-term follow-up.

DOI: 10.1007/s00330-006-0252-z

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Cite this paper

@article{Anselme2006MREO, title={MR evaluation of pulmonary vein diameter reduction after radiofrequency catheter ablation of atrial fibrillation}, author={Fr{\'e}d{\'e}ric Anselme and G{\'e}rald Gahide and Arnaud Savour{\'e} and Edouard Gerbaud and Mikael Mabru and Alain Cribier and Jean-Nicolas Dacher}, journal={European Radiology}, year={2006}, volume={16}, pages={2505-2511} }