Patent ID: 9033961
Filing Date: 2015-05-19
Classification: A61B,A61N

Abstract:
1. A cardiac tissue ablation system, comprising: an elongate catheter that is formed of a material that is substantially transparent to radiant energy and is configured to deliver a distal end thereof to a patient's heart; an expandable member having a distal end that is attached to the distal portion of the catheter and a proximal end that is attached to a proximal portion of the catheter, the expandable member being substantially transparent to radiant energy and having an elastic portion configured to conform to the shape of a target tissue region upon expansion; and an energy emitter assembly movably disposed within a lumen of the catheter such that the energy emitter assembly is surrounded by the catheter and a point of attachment between the expandable member and the distal portion of the catheter is distal to the energy emitter, the energy emitter assembly including an energy emitter that is configured to deliver a series of arc-shaped spots of radiant ablative energy through the material that forms the catheter and the expandable member to the target tissue region, wherein a distal end of the energy emitter includes a plurality of beveled faces that converge to define an energy emitting face at a distal tip of the energy emitter, the energy emitting face being of reduced cross-section relative to a proximal portion of the energy emitter so as to provide an arc-shaped exposure pattern upon impingement with the target tissue region; wherein the beveled energy emitting face of the energy emitter is rectangular and is offset from an optical axis of a lens such that the radiant ablation energy is projected as an arc shaped beam.