Adaptive peak detection system and method for heart pulse

• US 8,160,685 B2
• Filed: 02/16/2007
• Issued: 04/17/2012
• Est. Priority Date: 12/27/2006
• Status: Expired due to Fees

• Current Assignee: Sungkyunkwan University Foundation For Corporate Collaboration (SungKyunKwan University)
• Original Assignee: Sungkyunkwan University Foundation For Corporate Collaboration (SungKyunKwan University)
• Inventors: Lee, Sangwon, Cho, Jungdong, Choi, Myungsuk
• Primary Examiner(s): Layno, Carl H
• Assistant Examiner(s): Patel, Natasha
• Application Number:
  US11/707,296
• Publication Number:
  US 20080161706A1
• Time in Patent Office: 1,887 Days
• Field of Search: 600/512, 600/515, 600/509, 607/14
• US Class Current: 600/515
• CPC Class Codes: A61B 5/0245 by using sensing means generating electric signals, i.e. ECG signals
• CPC Class Codes: A61B 5/363 Detecting tachycardia or bradycardia

Abstract

The present application discloses an adaptive system and a method for detection of heartbeat peaks. The adaptive detection system for heartbeat peaks includes: means for detecting peaks of ventricular or atrial heartbeat signals; and means for determining heart conditions according to a detected peak interval. Heart beats can be detected at a low supply voltage, diseases can be determined according to the detected cardiogram signals, and treatment can be performed by diagnosis in the event of abnormality.

Claims

1. An adaptive detection system for heartbeat peaks comprising:

means for detecting peaks of ventricular or atrial heartbeat signals according to an adaptive threshold level such that after a peak is detected, the threshold is maintained at a same peak level for a predetermined period of time, decreased to a percentage of the peak level, and then further decreased to a lowest threshold level while a next signal detection is being carried out; and

means for determining heart conditions according to a detected peak interval,

wherein the heart condition determining means is adapted to detect and store peak interval, peak time, number of ventricular signals between atrial signals, number of atrial signals between ventricular signals, interval between ventricular and atrial peaks and far field heartbeat wave, according to the peak detected by the peak detecting means.

2. The adaptive detection system of claim 1, wherein the heart condition determining means is adapted to output judgment on Ventricular Tachycardia (VT), Fast Ventricular Tachycardia (FVT), Ventricular Fibrillation (VF), Atrial Tachycardia-Atrial Fibrillation (AT-AF) and Fast Atrial Tachycardia-Atrial Fibrillation (FAT-AF).

3. The adaptive detection system of claim 2, wherein the peak detecting means and the heart condition determining means are realized in one chip.

4. The adaptive detection system of claim 3, wherein the chip is transplantable to treat bradyarrhythmia.

5. The adaptive detection system of claim 1, wherein the peak detecting means is adapted to adaptively detect the adaptive threshold level according to the heartbeat signal to determine peak time.

6. The adaptive detection system of claim 5, wherein the peak detecting means is adapted to set a fixed minimum threshold level and, if a detected signal does not exceed the minimum threshold level, skip peak detection therefrom.

7. The adaptive detection system of claim 6, wherein the peak detecting means detects a second peak while decreasing the threshold level by five (5) levels per second at a time point of 200 ms from a time point of peak detection.

8. An adaptive detection method for heartbeat peaks comprising steps of:

detecting peaks of ventricular and atrial heartbeat signals according to an adaptive threshold level such that after a peak is detected, the threshold is maintained at a same peak level for a predetermined period of time, decreased to a percentage of the peak level, and then further decreased to a lowest threshold level while a next signal detection is being carried out; and

determining heart diseases according to the peak detected in the peak detecting step,

wherein the determining step comprises detecting and storing peak interval, peak time, number of ventricular signals between atrial signals, number of atrial signals between ventricular signals, interval between ventricular and atrial peaks and far field heartbeat wave, according to the peak detected by the peak detecting means.

9. The adaptive detection method of claim 8, wherein the detecting step comprises, upon detecting a first peak, detecting a second peak while decreasing the threshold level by five (5) levels per second at a time point of 200 ms from the detection of the first peak.

10. The adaptive detection method of claim 9, wherein the determining step comprises outputting judgment on Ventricular Tachycardia (VT), Fast Ventricular Tachycardia (FVT), Ventricular Fibrillation (VF), Atrial Tachycardia-Atrial Fibrillation (AT-AF) and Fast Atrial Tachycardia-Atrial Fibrillation (FAT-AF).