HEART-RATE VARIABILITY ANALYSIS METHOD AND ANALYSIS DEVICE

• US 20090105601A1
• Filed: 10/20/2008
• Published: 04/23/2009
• Est. Priority Date: 10/18/2007
• Status: Abandoned Application

• Current Assignee: MHRKS Gate Co., Ltd., Nipro Corporation
• Original Assignee: MHRKS Gate Co., Ltd., Nipro Corporation
• Inventors: KAMATA, Tohru
• Application Number:
  US12/254,468
• Publication Number:
  US 20090105601A1
• Time in Patent Office: Days
• US Class Current: 600/515
• CPC Class Codes: A61B 2562/0219 Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
• CPC Class Codes: A61B 5/02405 Determining heart rate variability
• CPC Class Codes: A61B 5/333 Recording apparatus specially adapted therefor
• CPC Class Codes: A61B 5/349 Detecting specific parameters of the electrocardiograph cycle
• CPC Class Codes: A61B 5/7214 using signal cancellation, e.g. based on input of two identical physiological sensors spaced apart, or based on two signals derived from the same sensor, for different optical wavelengths

Abstract

The present invention provides a heart-rate variability analysis method and analysis device that have a 24 hour monitoring function, that have a function for the high-precision measuring of the R-R interval heart-rate, and that can exclude the effect of respiratory movement on heart-rate variability. The present invention also provides a heart-rate variability analysis device capable of performing a detailed analysis of the heart rate.

The heart-rate variability analysis device comprises a measurement portion (1) and an analysis display portion (2). The measurement portion (1) has first and second cardiac action potential measuring means (11), (12) that are attached to the thoracic region and the diaphragmatic region, respectively; three-axis acceleration measuring means (13), (14); and transmitters (15), (16) for transmitting the measured cardiac action potential signals and acceleration signal to the analysis display portion (2). The analysis display portion (2) has a receiver (21) for receiving signals transmitted from the transmitters (15), (16); an interface (22) for transmitting the signals received by the receiver (21) to a computer; and a computer (23) that can analyze, display and/or print the heart-rate variability from the received cardiac action potential signals and acceleration signal.

Claims

1. A heart-rate variability analysis method for analyzing heart-rate variability on the basis of a cardiac action potential signal measured from the thoracic region at a time resolution of 3 msec or less, a cardiac action potential signal measured from the diaphragmatic region at a time resolution of 3 msec or less, and an acceleration signal of the body.

2. The heart-rate variability analysis method as recited in claim 1, wherein

six categories of data, which are instantaneous heart-rate time-series data, heart-rate variability rhythm ratio data, heart-rate variability fluctuation frequency HF component time-series data, heart-rate variability fluctuation frequency HF component rhythm ratio data, heart-rate variability fluctuation frequency LF/HF component time-series data, and heart-rate variability fluctuation frequency LF/HF component rhythm ratio data, are calculated on the basis of analysis of the cardiac action potential signal, and displayed.

3. The heart-rate variability analysis method as recited in claim 1, wherein

the cardiac action potential signal is measured by a Holter monitor which has a time resolution of 0.1 to 3 msec.

4. A heart-rate variability analysis device comprising:

a measurement portion including first cardiac action potential measuring means for measuring a cardiac action potential signal from the thoracic region, the first cardiac action potential measuring means having a time resolution of 3 msec or less;

second cardiac action potential measuring means for measuring a cardiac action potential signal from the diaphragmatic region, the second cardiac action potential measuring means having a time resolution of 3 msec or less; and

three-axis acceleration measuring means for measuring an acceleration signal; and

an analysis display portion for receiving the cardiac action potential signal and the acceleration signal transmitted from the measurement portion, and analyzing and displaying heart-rate variability.

5. The heart-rate variability analysis device as recited in claim 4, wherein

six categories of data, which are instantaneous heart-rate time-series data, heart-rate variability rhythm ratio data, heart-rate variability fluctuation frequency HF component time-series data, heart-rate variability fluctuation frequency HF component rhythm ratio data, heart-rate variability fluctuation frequency LF/HF component time-series data, and heart-rate variability fluctuation frequency LF/HF component rhythm ratio data, are calculated on the basis of analysis of the cardiac action potential signal, and displayed.

6. The device as recited in claim 4, wherein

a cardiac action potential signal is measured using a Holter monitor which has a time resolution of 0.1 to 3 msec.