Systems and methods for detecting ECG subwaveforms

• US 9,339,204 B2
• Filed: 03/19/2015
• Issued: 05/17/2016
• Est. Priority Date: 06/05/2014
• Status: Active Grant

• Current Assignee: Guangren Chen
• Original Assignee: Guangren Chen
• Inventors: Chen, Guangren, Hong, Cheng
• Primary Examiner(s): Flory, Christopher A
• Application Number:
  US14/662,996
• Publication Number:
  US 20150351653A1
• Time in Patent Office: 425 Days
• Field of Search: 600/516, 600/517, 600/523
• US Class Current: 1/1
• CPC Class Codes: A61B 5/0245 by using sensing means generating electric signals, i.e. ECG signals
• CPC Class Codes: A61B 5/283 Invasive
• CPC Class Codes: A61B 5/316 Modalities, i.e. specific diagnostic methods
• CPC Class Codes: A61B 5/318 Heart-related electrical modalities, e.g. electrocardiography [ECG]
• CPC Class Codes: A61B 5/327 Generation of artificial ECG signals based on measured signals, e.g. to compensate for missing leads
• CPC Class Codes: A61B 5/339 Displays specially adapted therefor
• CPC Class Codes: A61B 5/349 Detecting specific parameters of the electrocardiograph cycle
• CPC Class Codes: A61B 5/6801 specially adapted to be attached to or worn on the body surface
• CPC Class Codes: A61B 5/6869 Heart
• CPC Class Codes: A61B 5/7278 Artificial waveform generation or derivation, e.g. synthesising signals from measured signals A61B5/327 takes precedence
• CPC Class Codes: A61B 5/742 using visual displays A61B5/339 takes precedence
• CPC Class Codes: A61B 5/743 Displaying an image simultaneously with additional graphical information, e.g. symbols, charts, function plots

Abstract

Systems and methods are provided to detect subwaveforms of an ECG waveform. Electrical impulses are detected between at least one pair of electrodes of two or more electrodes placed proximate to a beating heart and are converted to an ECG waveform for each heartbeat of the beating heart using the detector. One or more subwaveforms within P, Q, R, S, T, U, and J waveforms of the ECG waveform for each heartbeat or in an interval between the P, Q, R, S, T, U, and J waveforms that represent the depolarization or repolarization of an anatomically distinct portion of muscle tissue of the beating heart are detected using a signal processor. A processed ECG waveform that includes the one or more subwaveforms for each heartbeat is produced using the signal processor. The processed ECG waveform is received from the signal processor is displayed using a display device.

Claims

1. An electrocardiography (ECG) system for detecting five ECG subwaveforms within the PR interval using electrodes configured to be placed on the skin of a patient, comprising:

two or more electrodes configured to be placed on the skin of a patient, configured to partially surround a beating heart of the patient, and configured to receive electrical impulses from the beating heart;

a detector that detects the electrical impulses from at least one pair of electrodes of the two or more electrodes and converts the electrical impulses to an ECG waveform for each heartbeat of the beating heart;

a signal processor that receives the ECG waveform for each heartbeat from the detector, individually detects five ECG subwaveforms within the PR interval of the ECG waveform that represent the depolarization of the sinoatrial node (SAN), the atria (right atrium (RA) and left atrium (LA)), the atrioventricular node (AVN), the bundle of His (HIS), and the bundle branches (BB), respectively, of the beating heart using five predetermined frequency ranges experimentally found for the SAN, the RA and LA, the AVN, and the BB, combines the five ECG subwaveforms, and replaces the PR interval of the ECG waveform with the combined five ECG subwaveforms, producing a processed ECG waveform that includes the combined five individual ECG subwaveforms in place of the PR interval for each heartbeat; and

a display device that displays the processed ECG waveform for each heartbeat.

2. The ECG system of claim 1, wherein the display device further displays the ECG waveform that includes the PR interval beneath the the processed ECG waveform that includes the combined five individual subwaveforms in place of the PR interval using the same time scale and displays lines from one or more subwaveforms of the five individual subwaveforms of the processed ECG waveform to the original PR interval of the ECG waveform to indicate the timing location of the one or more subwaveforms of the five individual subwaveforms in the PR interval of the ECG waveform.

3. The ECG system of claim 1, wherein

the signal processor further calculates timing information about the five ECG subwaveforms, timing information about intervals between the five ECG subwaveforms, and timing information about the five ECG subwaveforms and their relation to P, Q, R, S, T, U, and J waveforms of the ECG waveform for each heartbeat, and

the display device further displays the timing information about the five ECG subwaveforms, the timing information about the intervals between the five ECG subwaveforms, and the timing information about the five ECG subwaveforms and their relation to the P, Q, R, S, T, U, and J waveforms of the ECG waveform for each heartbeat.

4. The ECG system of claim 1, further comprising a memory device that receives the ECG waveform and the processed ECG waveform from the signal processor.

5. The ECG system of claim 4, wherein the memory device further includes normal processed ECG waveform data for a normal heartbeat or heartbeat without disease, wherein the signal processor further compares the processed ECG waveform to the normal processed ECG waveform data and calculates a status condition based on the comparison.

6. The ECG system of claim 5, further comprising a second display device surrounding a rotating button, wherein the signal processor further sends a colored pattern to the second display device based on the status condition.

7. An electrocardiography (ECG) system for detecting five ECG subwaveforms within the PR interval using invasive electrodes configured to be placed directly on the heart of a patient, comprising:

two or more electrodes configured to be placed directly on a beating heart of a patient that are configured to receive electrical impulses from the beating heart;

a detector that detects the electrical impulses from at least one pair of electrodes of the two or more electrodes and converts the electrical impulses to an ECG waveform for each heartbeat of the beating heart;

a signal processor that receives the ECG waveform for each heartbeat from the detector, detects five ECG subwaveforms within the PR interval of the ECG waveform that represent the depolarization of the sinoatrial node (SAN), the atria (right atrium (RA) and left atrium (LA)), the atrioventricular node (AVN), the bundle of His (HIS), and the bundle branches (BB), respectively, of the beating heart using five predetermined frequency ranges experimentally found for the SAN, the RA and LA, the AVN, and the BB, combines the five ECG subwaveforms, and replaces the PR interval of the ECG waveform with the combined five ECG subwaveforms, producing a processed ECG waveform that includes the combined five individual ECG subwaveforms in place of the PR interval for each heartbeat; and

a display device that displays the processed ECG waveform for each heartbeat.

8. The ECG system of claim 7, wherein the display device further displays the ECG waveform that includes the original PR interval beneath the the processed ECG waveform that includes the combined five individual subwaveforms in place of the PR interval using the same time scale and displays lines from one or more subwaveforms of the five individual subwaveforms of the processed ECG waveform to the original PR interval of the ECG waveform to indicate the timing location of the one or more subwaveforms of the five individual subwaveforms in the PR interval of the ECG waveform.

9. The ECG system of claim 7, wherein

the signal processor further calculates timing information about the five ECG subwaveforms, timing information about intervals between the five ECG subwaveforms, and timing information about the five ECG subwaveforms and their relation to P, Q, R, S, T, U, and J waveforms of the ECG waveform for each heartbeat, and

the display device further displays the timing information about the five ECG subwaveforms, the timing information about the intervals between the five ECG subwaveforms, and the timing information about the five ECG subwaveforms and their relation to the P, Q, R, S, T, U, and J waveforms of the ECG waveform for each heartbeat.

10. The ECG system of claim 7, further comprising a memory device that receives the ECG waveform and the processed ECG waveform from the signal processor.

11. The ECG system of claim 10, wherein the memory device further includes normal processed ECG waveform data for a normal heartbeat or heartbeat without disease, wherein the signal processor further compares the processed ECG waveform to the normal processed ECG waveform data and calculates a status condition based on the comparison.

12. The ECG system of claim 11, further comprising a second display device surrounding a rotating button, wherein the signal processor further sends a colored pattern to the second display device based on the status condition.