Electrophysiology mapping system

• US 5,662,108 A
• Filed: 04/12/1995
• Issued: 09/02/1997
• Est. Priority Date: 09/23/1992
• Status: Expired due to Term

• Current Assignee: St. Jude Medical, Atrial Fibrillation Division, Inc. (Abbott Laboratories)
• Original Assignee: Endocardial Solutions Incorporated (Abbott Laboratories)
• Inventors: Beatty, Graydon Ernest, Budd, Jeffrey Robert, Hauck, John Anderson
• Primary Examiner(s): Cohen, Lee S.
• Assistant Examiner(s): WINAKUR, ERIC FRANK
• Application Number:
  US08/420,698
• Time in Patent Office: 874 Days
• Field of Search: 128/642, 128/696, 128/734
• US Class Current: 600/374
• CPC Class Codes: A61B 18/1492 having a flexible, catheter-like structure, e.g. for heart ablation A61B18/1477 takes precedence
• CPC Class Codes: A61B 18/18 by applying electromagnetic radiation, e.g. microwaves radiation therapy A61N5/00
• CPC Class Codes: A61B 18/1815 using microwaves
• CPC Class Codes: A61B 18/24 with a catheter A61B18/26, A61B18/28 take precedence
• CPC Class Codes: A61B 2018/00214 Expandable means emitting energy, e.g. by elements carried thereon
• CPC Class Codes: A61B 2018/0022 Balloons
• CPC Class Codes: A61B 2018/00267 having a basket shaped structure
• CPC Class Codes: A61B 2018/00351 Heart
• CPC Class Codes: A61B 2018/00577 Ablation
• CPC Class Codes: A61B 2018/00839 Bioelectrical parameters, e.g. ECG, EEG
• CPC Class Codes: A61B 2018/00875 Resistance or impedance
• CPC Class Codes: A61B 2018/00892 Voltage
• CPC Class Codes: A61B 2090/061 for measuring dimensions, e.g. length
• CPC Class Codes: A61B 2560/045 with a separable interface unit, e.g. for communication
• CPC Class Codes: A61B 2562/043 in a linear array
• CPC Class Codes: A61B 2562/046 in a matrix array
• CPC Class Codes: A61B 5/0538 invasively, e.g. using a catheter
• CPC Class Codes: A61B 5/1076 for measuring dimensions inside body cavities, e.g. using catheters A61B3/1005 takes precedence
• CPC Class Codes: A61B 5/282 Holders for multiple electrodes for introduction into the body A61B5/287
• CPC Class Codes: A61B 5/283 Invasive
• CPC Class Codes: A61B 5/287 : Holders for multiple electrodes, e.g. electrode catheters for electrophysiological study [EPS]
• CPC Class Codes: A61B 5/30 : Input circuits therefor
• CPC Class Codes: A61B 5/6853 : with a balloon
• CPC Class Codes: A61B 5/6858 : with a distal basket, e.g. expandable basket
• CPC Class Codes: A61N 1/3625 : External stimulators
• CPC Class Codes: A61N 1/3702 : Physiological parameters A61N1/365 takes precedence; evoked response A61N1/371
• CPC Class Codes: Y10T 29/49117 : Conductor or circuit manufacturing

Abstract

A mapping catheter is positioned in a heart chamber, and active electrode sites are activated to impose an electric field within the chamber. The blood volume and wall motion modulates the electric field, which is detected by passive electrode sites on the preferred catheter. Electrophysiology measurements, as well as geometry measurements, are taken from the passive electrodes and used to display a map of intrinsic heart activity.

Claims

1. A process for measuring electrophysiologic data in a heart chamber comprising the steps of:

(a) positioning a set of passive electrodes within a patient'"'"'s heart;

(b) positioning a set of active electrodes within a patient'"'"'s heart;

(c) supplying oscillating current to said set of active electrodes thereby generating an electric field in said heart chamber;

(d) detecting said electric field at said passive electrode sites, generating a set of electric field measurement data;

(e) extracting in the frequency domain, from said field measurement data, that component of said field measurement data corresponding to chamber geometry and generating chamber geometry data;

(f) extracting in the frequency domain, from said field measurement data, that component of said field measurement data corresponding to the underlying intrinsic electrophysiologic activity of the heart chamber, and generating electrophysiology data;

(g) graphically displaying said chamber geometry data;

(h) graphically displaying said electrophysiologic data.