# US 5,662,108 A · Electrophysiology mapping system

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- Number: US 5,662,108 A
- Document ID: US5662108A
- Status: Granted
- Kind: A
- Application number: 08/420,698
- Filed: 1995-04-12
- Granted: 1997-09-02
- Earliest claimed: 1992-09-23
- Assignees: Endocardial Solutions, Inc.
- Inventors: Jeffrey Robert Budd; Graydon Ernest Beatty; John Anderson Hauck
- Web page: https://patentgrep.com/patent/US5662108A

## CPC

- A61B 5/6853: {with a balloon}
- A61B 5/0538: invasively, e.g. using a catheter
- A61B 5/1076: {for measuring dimensions inside body cavities, e.g. using catheters (A61B3/1005 takes precedence)}
- A61B 5/282: Holders for multiple electrodes (for introduction into the body A61B5/287)
- A61B 5/283: Invasive
- A61B 5/287: Holders for multiple electrodes, e.g. electrode catheters for electrophysiological study [EPS]
- A61B 5/308: for electrocardiography [ECG]
- A61B 5/6858: {with a distal basket, e.g. expandable basket}
- A61B 18/1492: {having a flexible, catheter-like structure, e.g. for heart ablation (A61B18/1477 takes precedence)}
- A61N 1/3625: {External stimulators}
- A61N 1/3702: {Physiological parameters (A61N1/365 takes precedence; evoked response A61N1/371)}
- A61B 18/18: by applying electromagnetic radiation, e.g. microwaves
- A61B 18/1815: {using microwaves}
- A61B 18/24: with a catheter (A61B18/26, A61B18/28 take precedence)
- A61B 2018/00214: {Expandable means emitting energy, e.g. by elements carried thereon}
- A61B 2018/0022: {Balloons}
- A61B 2018/00267: {having a basket shaped structure}
- A61B 2018/00351: {Heart}
- A61B 2018/00577: {Ablation}
- A61B 2018/00839: {Bioelectrical parameters, e.g. ECG, EEG}
- A61B 2018/00875: {Resistance or impedance}
- A61B 2018/00892: {Voltage}
- A61B 2090/061: {for measuring dimensions, e.g. length}
- A61B 2560/045: with a separable interface unit, e.g. for communication
- A61B 2562/043: in a linear array
- A61B 2562/046: in a matrix array
- Y10T 29/49117: Conductor or circuit manufacturing
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## 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

### Claim 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.