abstract |
Apparatus for mapping a wall of a heart forming a chamber in the heart comprising a guiding catheter (21) having a lumen extending therethrough and a mapping catheter (51) having a shaft (52) that is slidably mounted in the lumen of the guiding catheter. A basket assembly (61) is provided and is comprised of a plurality of circumferentially spaced-apart longitudinally extending arms (62) having proximal and distal extremities (63, 64). The proximal extremities of the arms are secured to the distal extremity of the shaft of the mapping catheter. Each of the arms includes a member formed of a material having a recoverable strain in excess of 1 % and had an outwardly bowed shape memory. At least one electrode (68) is provided on each of the arms. Conductors (69) connected to the electrodes are carried by the arms. |