Patent ID: 9131983
Filing Date: 2015-09-15
Classification: A61B,A61M

Abstract:
1. A method of treating atrial fibrillation, the method including the steps of: advancing a guiding catheter until its distal end is situated in the ostium of a pulmonary vein; advancing an ablation system through the guiding catheter until the distal end of the ablation system lies within the pulmonary vein, the ablation system including a distal portion with expandable tubes, each expandable tube having an injection needle, the ablation system designed to allow injection of ablative fluid through the injection needles; centering the ablation system with respect to the pulmonary vein by expanding an expandable structure of the ablation system within the pulmonary vein, the expandable structure expanded to less than the diameter of the pulmonary vein; causing the expandable tubes and distal injection needles to expand outward around the circumference of the ablation system; advancing the injection needles into the wall of the left atrium of the heart; and injecting ablative fluid into the wall of the left atrium through the injection needles.