CATHETER WITH MEMBRANED SPINES FOR PULMONARY VEIN ISOLATION

摘要

A catheter adapted for pulmonary vein isolation, has a distal electrode assembly that can sit stably in an ostium as secured by a plurality of spines and a membrane member. Preshapened and flexible, the spines support the membrane in a concave configuration when the distal electrode assembly approaches the ostium, the spines and membrane member being sized and configured to span across and over the ostium. As the distal electrode assembly is pushed into the ostium, the membrane member elastically deforms, generally turning inside out to expose surface electrodes carried on a contact surface of the membrane member and ring electrodes carried on the spine for contact with the ostium. The membrane member may be inflated. The ring electrodes contact tissue along axial lines of the ostium. The surface electrodes contact tissue along radial lines of the ostium.

主权项

1. A catheter comprising:
an elongated catheter shaft having at least one lumen therethrough, the catheter shaft defining a longitudinal axis; a distal electrode assembly configured to adopt a deployed configuration, the assembly having a plurality of spines, each spine having a generally linear proximal portion and a distal portion curved toward the longitudinal axis, and a membrane member spanning over at least a portion of each spine to define a distal concavity when the assembly is in the deployed configuration.