Balloon for ablation around pulmonary vein

The invention relates to a balloon for ablation around a pulmonary vein. An ablation method is provided by introducing a catheter into a left atrium, extending a lasso guide through a lumen of the catheter to engage a wall of a pulmonary vein, and deploying a balloon over the lasso guide to perform a cardiac ablation. The balloon has an electrode assembly disposed outside the balloon. The electrode assembly includes a plurality of ablation electrodes disposed about a perimeter of a longitudinal axis of the catheter. The inflation balloon is positioned against the pulmonary vein ostium such that the ablation electrode is in electrical contact with the pulmonary vein, and electrical energy is conducted through the ablation electrode to create a peripheral lesion that circumscribes the pulmonary vein. 本发明题为"用于围绕肺静脉消融的球囊"。本发明提供了一种消融方法，即通过将导管引入左心房中、将套索引导件延伸穿过导管的管腔以接合肺静脉的壁，以及将球囊部署在套索引导件上来实施心脏消融术。球囊具有设置在球囊的外部的电极组件。电极组件包括围绕导管的纵向轴线周边布置的多个消融电极。将膨胀球囊定位成抵靠肺静脉口，使得消融电极与肺静脉电接触，以及将电能通过消融电极传导以产生外接肺静脉的周边消融灶。