Process for sensing and analyzing electrical activity of the human heart utilizing one lead system with an egg monitor designed for use with another lead system

• US 6,496,720 B1
• Filed: 01/28/2000
• Issued: 12/17/2002
• Est. Priority Date: 01/28/2000
• Status: Expired due to Term

• Current Assignee: Zymed Medical Instrumentation Incorporated
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Feild, Dirk Q.
• Primary Examiner(s): EVANISKO, GEORGE ROBERT
• Application Number:
  US09/493,780
• Time in Patent Office: 1,054 Days
• Field of Search: 600/508, 600/509, 600/512, 600/522, 600/523
• US Class Current: 600/509
• CPC Class Codes: A61B 5/30 Input circuits therefor
• CPC Class Codes: A61B 5/304 Switching circuits
• CPC Class Codes: A61B 5/346 Analysis of electrocardiograms

Abstract

A process for sensing and analyzing electrical activity of the human heart includes the use of a set of electrodes for a first lead system and an ECG monitor design for use with a second lead system that is different from the first lead system. Output signals from the first lead system electrodes are connected to first, second and third channel inputs for the ECG monitor. The input signals to the ECG monitor are linearly transformed to output first, second and third ECG channels which are consistent with standard output for the first lead system. In linearly transforming the inputted signals to the ECG monitor, differences between the first lead system electrodes and the ECG monitor are manipulated either before the output signals from the first lead system electrodes are fed to the channel inputs for the ECG monitor, or after the ECG monitor has formed channels. Specifically disclosed herein is the transformation of signals between 1) a standard bedside system I lead system, 2) a standard EASI lead system, 3) a standard bedside system II lead system, and 4) a Dower EASI lead system.

Claims

1. A process for sensing and analyzing electrical activity of a human heart, comprising the steps of:

providing a set of electrodes designed for a first lead system;

providing an ECG monitor designed to receive output signals from a second lead system that is different from the first lead system, and form output channels consistent with output for which the second lead system was designed;

connecting output signals from the first lead system electrodes to channel inputs for the ECG monitor;

transforming data provided by the output signals from the first lead system; and

outputting through the ECG monitor at least one channel signal which is consistent with output for which the first lead system was designed.

2. The process of claim 1, wherein the transforming step includes a linear transformation of the data to output the at least one channel signal.

3. The process of claim 1, wherein the transforming step includes the step of applying an algorithm to the data after the ECG monitor has formed channels.

4. The process of claim 1, wherein the transforming step includes the step of applying an algorithm to the data before the output signals from the first lead system electrodes are fed to the channel inputs for the ECG monitor.

5. The process of claim 1, wherein the transforming step includes the step of transforming the data to the ECG monitor to output first, second and third ECG channels which are consistent with output for which the first lead system was designed.

6. The process of claim 5, wherein the first lead system comprises one of the following:

1) standard bedside system I;

     2) standard EASI system;

     3) standard bedside system II; and

     4) Dowver EASI system.

7. The process of claim 6, wherein the second lead system comprises one of the following:

1) standard bedside system I;

     2) standard EASI system;

     3) standard bedside system II; and

     4) Dower EASI system.

8. The process of claim 5, wherein the connecting step includes the steps of:

connecting a first electrode and a second electrode of the first lead system to a first channel of the ECG monitor;

connecting a third electrode and the second electrode of the first lead system to a second channel of the ECG monitor; and

connecting the third electrode and a fourth electrode of the first lead system to a third channel of the ECG monitor.

9. The process of claim 1, wherein the first lead system comprises an EASI lead system, and the second lead system comprises a conventional cable having at least four conventional electrodes which provide input to a conventional 3-channel ECG monitor.

10. The process of claim 9, wherein the first electrode is the E electrode, the second electrode is the S electrode, the third electrode is the A electrode, and the fourth electrode is the I electrode of the EASI lead system.

11. The process of claim 1, wherein the first lead system comprises a conventional cable that provides input for a conventional 3-channel ECG monitor, and the second lead system comprises an EASI lead system.

12. The process of claim 11, wherein the first electrode is a left arm electrode, the second electrode is a right arm electrode, the third electrode is a left leg electrode, and the fourth electrode is an exploring electrode of the conventional cable for the conventional 3-channel ECG monitor.

13. A process for sensing and analyzing electrical activity of a human heart, comprising the steps of:

providing a set of electrodes designed for a first lead system;

providing an ECG monitor designed to receive output signals from a second lead system that is different from the first lead system, and form output channels consistent with output for which the second lead system was designed;

connecting output signals from the first lead system electrodes to first, second and third channel inputs for the ECG monitor;

linearly transforming data provided by the output signals from the first lead system; and

outputting first, second and third ECG channels which are consistent with output for which the first lead system was designed.

14. The process of claim 13, wherein the connecting step includes the steps of:

connecting a first electrode and a second electrode of the first lead system to a first channel of the ECG monitor;

connecting a third electrode and the second electrode of the first lead system to a second channel of the ECG monitor; and

connecting the third electrode and a fourth electrode of the first lead system to a third channel of the ECG monitor.

15. The process of claim 13, wherein the first lead system comprises an EASI lead system, the second lead system comprises a conventional cable having at least four conventional electrodes which provide input to a conventional 3-channel ECG monitor, and wherein the first electrode is the E electrode, the second electrode is the S electrode, the third electrode is the A electrode, and the fourth electrode is the I electrode of the EASI lead system.

16. The process of claim 13, wherein the first lead system comprises a conventional cable that provides input for a conventional 3-channel ECG monitor, the second lead system comprises an EASI lead system, and wherein the first electrode is a left arm electrode, the second electrode is a right arm electrode, the third electrode is a left leg electrode, and the fourth electrode is an exploring electrode of the conventional cable for the conventional 3-channel ECG monitor.

17. The process of claim 13, wherein the transforming step includes the step of applying an algorithm to the data after the ECG monitor has formed channels.

18. The process of claim 13, wherein the transforming step includes the step of applying an algorithm to the data before the output signals from the first lead system electrodes are fed to the channel inputs for the ECG monitor.

19. A process for sensing and analyzing electrical activity of a human heart, comprising the steps of:

providing a set of electrodes designed for a first lead system taken from the group of

     1) standard bedside system I,

     2) standard EASI system,

     3) standard bedside system II, and

     4) Dower EASI system;

providing an ECG monitor designed to receive output signals from a second lead system taken from the group of

     1) standard bedside system I,

     2) standard EASI system,

     3) standard bedside system II, and

     4) Dower EASI system, that is different from the first lead system, the ECG monitor being designed to form output channels consistent with output for which the second lead system was designed;

connecting output signals from the first lead system electrodes to first, second and third channel inputs for the ECG monitor;

linearly transforming data provided by the output signals from the first lead system; and

outputting first, second and third ECG channels which are consistent with output for which the first lead system was designed.

20. The process of claim 19, wherein the transforming step includes the step of applying an algorithm to the data after the ECG monitor has formed channels.

21. The process of claim 19, wherein the transforming step includes the step of applying an algorithm to the data before the output signals from the first lead system electrodes are fed to the channel inputs for the ECG monitor.