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Journal Articles European Radiology Year : 2006

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

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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.

Dates and versions

inserm-00473763 , version 1 (16-04-2010)

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Frédéric Anselme, Gérald Gahide, Arnaud Savouré, Édouard Gerbaud, Mikael Mabru, et al.. MR evaluation of pulmonary vein diameter reduction after radiofrequency catheter ablation of atrial fibrillation.. European Radiology, 2006, 16 (11), pp.2505-11. ⟨10.1007/s00330-006-0252-z⟩. ⟨inserm-00473763⟩
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