Method and apparatus in connection with measuring the heartbeat rate of a person

• US 5,840,039 A
• Filed: 06/27/1997
• Issued: 11/24/1998
• Est. Priority Date: 12/29/1994
• Status: Expired due to Term

• Current Assignee: Polar Electro Oy
• Original Assignee: Polar Electro Oy
• Inventors: Heikkila, Ilkka
• Primary Examiner(s): Jastrzab, Jeffrey R.
• Application Number:
  US08/860,502
• Time in Patent Office: 515 Days
• Field of Search: 128/702-708, 482/8, 482/9, 482/900-902, 600/515-521
• US Class Current: 600/519
• CPC Class Codes: A61B 5/0245 by using sensing means generating electric signals, i.e. ECG signals
• CPC Class Codes: A61B 5/222 combined with detection or measurement of physiological parameters, e.g. heart rate
• CPC Class Codes: A61B 5/4035 Evaluating the autonomic nervous system

Abstract

The present invention relates to a method and apparatus in connection with measuring the heartbeat rate of a person. In the method, the ECG signal of the person and the timing moment of at least one ECG signal waveform, such as the QRS complex, are measured with a heartbeat rate monitor. The average heartbeat rate frequency of the heartbeat rate is calculated from the ECG signal. Heartbeat rate variation information proportional to the magnitude of the heartbeat rate variation or to that of the total or partial power of a spectrum derived from the heartbeat rate is provided by means of a mathematical function. The heartbeat rate variation information is displayed on the display of the heartbeat rate monitor together with the average heartbeat rate frequency.

Claims

1. A method in connection with measuring the heartbeat rate of a person, comprising the following steps:

measuring the ECG signal of the person and the timing moment of at least one ECG signal waveform,

calculating the average heartbeat rate from the ECG signal,

providing, by means of a mathematical function, real-time heartbeat rate variation information proportional to one of the magnitude of the heartbeat rate variation, the total power of a spectrum derived from the heartbeat rate and the partial power of a spectrum derived from the heartbeat rate, and

displaying in real time said heartbeat rate variation information.

2. A method according to claim 1 further comprising the additional step of displaying the heartbeat rate variation information simultaneously with the average heartbeat rate.

5. A method according to claim 1, wherein in said step of providing the heartbeat rate variation information, the heartbeat rate variation information is calculated by means of a statistical function which provides the standard deviation of the heartbeat rate as a result.

6. A method according to claim 1, wherein in said step of providing the heartbeat rate variation information, the heartbeat rate variation information is calculated by means of a statistical function which provides one of the height and width of the distribution pattern of one of an instantaneous heartbeat rate signal and R--R signal as a result.

7. A method according to claim 1, wherein in said step of providing the heartbeat rate variation information, the heartbeat rate variation information is calculated from a continuous heartbeat rate signal.

8. A method according to claim 1 including the step of constantly monitoring development of the heartbeat rate variation.

9. A method according to claim 1, including the steps of generating a magnetic field varying with the rhythm of the heartbeat rate with a telemetric transmitter unit and detecting said magnetic field with a telemetric receiver unit, said steps of calculating the average heartbeat rate frequency, providing real time heartbeat rate variation information and displaying said heartbeat rate variation information being performed by said telemetric receiver unit.

10. A method as described in claim 9 including the steps of positioning said telemetric transmitter unit near the chest of the person and securing said telemetric receiver unit to a wrist of the person.

3. A method according to claim further comprising the additional step of indicating the heartbeat rate variation information at least one of graphically and digitally.

4. A method according to claim 3, wherein the heartbeat rate variation information is indicated simultaneously both graphically and digitally.

11. An apparatus in connection with measuring the heartbeat rate of a person, the apparatus comprising:

means for detecting and transmitting heartbeat signals,

a heartbeat rate monitor for receiving, calculating and measuring said heartbeat signals, and for registering the timing moment of at least one ECG signal waveform contained by a heartbeat signal,

means for calculating on a real-time basis the average heartbeat rate on the basis of the ECG signal,

means for providing real-time heartbeat rate variation information proportional to one of the magnitude of the heartbeat rate variation, the total power of a spectrum derived from the heartbeat rate and the partial power of a spectrum derived from the heartbeat rate by means of a mathematical function, and

means for indicating in real time the heartbeat rate variation information on the heartbeat rate monitor.

12. An apparatus according to claim 11, wherein the means for indicating the heartbeat rate variation information on the heartbeat rate monitor comprises a display element which also indicates the average heartbeat rate information.

13. An apparatus according to claim 11, wherein the means for indicating the heartbeat rate variation information comprises at least one of a graphic and digital display element.

14. An apparatus according to claim 11, wherein the means for indicating the heartbeat rate variation information comprises a display element which also indicates modes and set conditions on the heartbeat rate monitor.

15. An apparatus according to claim 11, further comprising a high pass filter for filtering a heartbeat rate signal.

16. An apparatus according to claim 11, wherein said means for detecting and transmitting heartbeat signals comprises a telemetric transmitter unit and said heartbeat monitor comprises a telemetric receiver unit, said telemetric transmitter unit including means for generating a magnetic field varying with the rhythm of the heartbeat rate, said telemetric receiver unit including means for detecting the magnetic field generated by the telemetric transmitter unit.

17. An apparatus according to claim 16, wherein said heartbeat rate monitor includes means for constantly monitoring development of heartbeat rate variation.

18. A method of providing information relating to the heartbeat of a person, comprising:

measuring the ECG signal of the person and the timing moment of at least one ECG signal waveform,

providing, from the ECG signal, a pulse sequence wherein each pulse is representative of a heartbeat of the person, said pulse sequence having intervals between the pulses of said pulse sequence,

calculating on a real time basis the average heartbeat rate from the pulse sequence derived from the ECG signal,

providing, by means of a mathematical function, real time heartbeat interval variation information proportional to one of the magnitude of the heartbeat interval variation, the total power of a spectrum derived from the heartbeat rate and the partial power of a spectrum derived from the heartbeat rate, and

displaying in real time said heartbeat interval variation information.

19. A method as described in claim 18, wherein each pulse corresponds to an R peak of an ECG signal.

20. A method as described in claim 18 including the step of displaying said heartbeat interval variation and said average heartbeat rate simultaneously.

21. A method as described in claim 18 including the steps of detecting said ECG signal with a telemetric transmitter unit and displaying said heartbeat interval variation information on a telemetric receiver unit worn by the person.

22. An apparatus for measuring the heartbeat rate of a person and providing heartbeat interval variation information, comprising:

means for detecting and transmitting heartbeat signals,

a receiver unit for receiving said heartbeat signals and for registering the timing moment of at least one ECG signal waveform contained by a heartbeat signal, and for providing from the ECG signal, a pulse sequence wherein each pulse is representative of a heartbeat of the person, said pulse sequence having intervals between the pulses of said pulse sequence, means for calculating on a real time basis the average heartbeat rate on the basis of the ECG signal,

means for providing real time heartbeat interval variation information proportional to one of the magnitude of the heartbeat interval variation, the total power of a spectrum derived from the heartbeat rate and the partial power of a spectrum derived from the heartbeat rate, wherein the heartbeat interval variation is based on collected intervals between the pulses of said pulse sequence, and

means for indicating, in real time, said heartbeat interval variation information.

23. An apparatus as described in claim 22, wherein said intervals between heartbeat signals correspond to the R--R intervals obtained from QRS complexes of individual ECG signals.

24. An apparatus as described in claim 22, wherein said means for detecting and transmitting heartbeat signals is a telemetric transmitter unit, said apparatus includes a telemetric receiver unit, said means for calculating, means for providing and means for indicating being incorporated in said telemetric receiver unit.