Importance

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Abstract

An endocardial catheter for mapping and/or ablation for use in a chamber of a heart defined by a wall comprising a flexible elongate tubular member having proximal and distal extremities. A basket assembly is mounted on the distal extremity of the flexible elongate member. The basket assembly is movable between expanded and contracted positions. The basket assembly has electrodes carried thereby which are adapted to be moved into engagement with the wall of the heart. A push-pull element is provided having proximal and distal extremities extending longitudinally of the tubular member and extending beyond the distal extremity of the tubular member and movable axially of the tubular member. The basket assembly has proximal and distal extremities. The proximal extremity of the basket assembly is secured to the distal extremity of the tubular member. The distal extremity of the basket assembly is secured to the distal extremity of the push-pull element. The proximal extremity of the flexible elongate member is secured to the push-pull element for sensing the force being applied to the push-pull element by the basket assembly as the heart is beating to ascertain whether or not the electrodes carried by the basket assembly are in continuous engagement with the wall of the heart during beating of the heart.

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First Claim