Patent ID: 7881807
Filing Date: 2011-02-01
Classification: A61B,A61M,C08L

Abstract:
1. A method of ablating a region of tissue at a location where a pulmonary vein extends from an atrium, comprising: inserting a transeptal sheath through an atrial septum that separates a right atrium from the left atrium; inserting a guide member having a preshaped distal portion with a predetermined shape and a lumen in at least the preshaped distal portion through the transeptal sheath from the right atrium into the left atrium whereby the guide member takes the predetermined shape automatically external to the transeptal sheath; pointing the preshaped distal portion of the guide member towards a predetermined pulmonary vein by adjustably advancing the guide member through the transeptal sheath, controlling the shape of the preshaped distal portion; after advancing the guide member, slidably advancing an anchor device through the lumen of the guide member and into the atrium, the anchor device being adapted to be positioned within the pulmonary vein and having an elongate body with a proximal end portion and a distal end portion, and also having an expandable member along the distal end portion adjustable between a radially collapsed condition and a radially expanded condition that is adapted to engage the pulmonary vein; positioning the anchor device within the pulmonary vein; anchoring the distal end portion of the anchor device within the pulmonary vein by adjusting the expandable member from the radially collapsed condition to the radially expanded condition; providing an ablation catheter adapted to slideably engage and track over the anchor device and also having an ablation element adapted to couple to an ablation actuator; advancing the ablation catheter into the atrium over the anchor device until the ablation element is positioned at the location; actuating the ablation actuator to energize the ablation element; and ablating the region of tissue with the ablation element.