Patent ID: 7655005
Filing Date: 2010-02-02
Classification: A61B,A61N

Abstract:
1. An ablation device assembly for ablating a circumferential region of tissue at a location within a body space where a pulmonary vein extends from an atrium, comprising: an elongate body with a proximal end portion, a distal end portion, and a longitudinal axis; a first expansion element having a first uniform wall thickness (t), located along the distal end portion, the first expansion element being fluidly coupled to a source of inflation fluid by a first inflation lumen, and expandable from a radially collapsed condition to a radially expanded condition; a second expansion element having a second uniform wall thickness (t′) located along the distal end portion proximal the first expansion element, the second expansion element being fluidly coupled to the source of inflation fluid by the first inflation lumen, and being expandable from a radially collapsed condition to a radially expanded condition, wherein the first wall thickness (t) of the first expansion element is smaller than the second wall thickness (t′) of the second expansion element; and an ablation element having an ablative energy source that is located along the distal end portion within the second expansion element, wherein the ablation element cooperates with the second expansion element such that the ablative energy source emits a substantially circumferential pattern of energy through the second expansion element.