Endocardial mapping system

a mapping system and endocardial technology, applied in the field of endocardial mapping system, can solve the problems of inability to accurately resolve the location of ectopic tissue masses, the two-dimensional maps of the electrical potentials at the endocardial surface generated by these traditional processes suffer many defects, and the resolution of traditional systems is limited

USRE41334E1Inactive Publication Date: 2010-05-11ST JUDE MEDICAL ATRIAL FIBRILLATION DIV
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Patents(United States)
Current Assignee / Owner
Publication Date
2010-05-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

A system for mapping electrical activity of a patient's heart includes a set of electrodes spaced from the heart wall and a set of electrodes in contact with the heart wall. Voltage measurements from the electrodes are used to generate three-dimensional and two-dimensional maps of the electrical activity of the heart.
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Description

CROSS-REFERENCE TO RELATED APPLICATIONS<?insert-end id="INS-S-00001" ?>

[0001] This application is a continuation-in-part of U.S. nonprovisional application Ser. No. 08 / 376,067, filed Jan. 20, 1995, now U.S. Pat. No. 5,553,611, which is a continuation of U.S. nonprovisional application Ser. No. 08 / 178,128, filed Jan. 6, 1994, now abandoned. This application is a reissue of U.S. nonprovisional application Ser. No. 08 / 387,832, filed May 26, 1995, now U.S. Pat. No. 6,240,307, which is a 371 of PCT / US1993 / 09015, filed Sep. 23, 1993, which is a continuation-in-part of U.S. nonprovisional application Ser. No. 07 / 950,448, filed Sep. 23, 1992, now U.S. Pat. No. 5,297,549 and U.S. nonprovisional application Ser. No. 07 / 949,690, filed Sep. 23, 1992, now U.S. Pat. No. 5,311,866.<?insert-end id="INS-S-00002" ?>

[0002] Applicants have filed a child application of the present reissue of U.S. Pat. No. 6,240,307. The child application is application Ser. No. 10 / 955,894.TECHNICAL FIELD[0003...

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Embodiment Construction

[0023]In general, the system of the present invention is used for mapping the electrical activity of the interior surface of a heart chamber 80. The mapping catheter assembly 14 includes a flexible lead body 72 connected to a deformable distal lead body 74. The deformable distal lead body 74 can be formed into a stable space filling geometric shape after introduction into the heart cavity 80. This deformable distal lead body 74 includes an electrode array 19 defining a number of electrode sites. The mapping catheter assembly 14 also includes a reference electrode preferably placed on a reference catheter 16 which passes through a central lumen 82 formed in the flexible lead body 72 and the distal lead body 74. The reference catheter assembly 16 has a distal tip electrode assembly 24 which may be used to probe the heart wall. This distal contact electrode assembly 24 provides a surface electrical reference for calibration. The physical length of the reference catheter 16 taken with t...