Endocardial electrical mapping catheter and method
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United States of America
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Aug 25, 1998
Grant Date -
N/A
app pub date -
Aug 13, 1995
filing date -
Feb 11, 1992
priority date (Note) -
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Abstract
An endocardial mapping catheter .?.for locating the ectopic focus of an abnormally functioning heart includes an actuator assembly and an elongated hollow support sheath which extends from the actuator assembly. A plurality of electrical probes are slidingly disposed for independent movement through the sheath, and each probe is attached to the actuator assembly for individual manipulation. A guide is mounted on the end of the sheath opposite the actuator assembly, at the distal end of the sheath, to radially deploy each electrical probe along a separate favorable trajectory as the probe is manipulated to move distally through the sheath. In operation, the probes are initially retracted into the sheath as the guide is positioned inside the left ventricle of the heart. Once the guide is positioned as desired, all of the probes are individually deployed until they have each made contact with the endocardium of the left ventricle. Timed responses are obtained from the probes, and a series of such responses from various guide locations in the left ventricle are recorded to accomplish circumferential endocardial mapping of the heart..!. .Iadd.comprising an elongate flexible support sheath having a proximal end and a distal end and a plurality of electrical probes. Each of the probes has a proximal end and a distal end and is slidably disposed in the support sheath. A guide is disposed on the distal end of the support sheath and has a plurality of passageways. Each of the passageways separately receives one of the probes and is formed with a surface having an arcuately extending distal portion. Actuators are carried by the proximal ends of the probes for deploying the distal ends of the probes from the support sheath. The arcuately extending distal portion of each surface serves to radially deploy the distal end of a probe from the guide along a favorable trajectory from the guide as the probe is individually moved distally through the support sheath..Iaddend.
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