Method and Apparatus for Presenting Heart Rate Variability by Sound and/or Light

• US 20100125217A1
• Filed: 03/24/2009
• Published: 05/20/2010
• Est. Priority Date: 11/17/2008
• Status: Abandoned Application

• Current Assignee: National Yang-Ming University
• Original Assignee: National Yang-Ming University
• Inventors: Yang, Ching-Hsiu, Kuo, Bo-Jau
• Application Number:
  US12/409,730
• Publication Number:
  US 20100125217A1
• Time in Patent Office: Days
• US Class Current: 600/515
• CPC Class Codes: A61B 5/02405 Determining heart rate variability
• CPC Class Codes: A61B 5/02455 provided with high/low alarm devices
• CPC Class Codes: A61B 5/4035 Evaluating the autonomic nervous system
• CPC Class Codes: A61B 5/7415 Sound rendering of measured values, e.g. by pitch or volume variation A61B5/741 takes precedence
• CPC Class Codes: A61B 5/742 using visual displays A61B5/339 takes precedence

Abstract

An apparatus is disclosed for presenting heart rate variability, comprising a sensor for collecting electrocardiogram signals; an analog-to-digital converter for digitalizing electrocardiogram signals; an operating unit, converting said digitalized electrocardiogram signals to one or more heart rate variability parameters and further converting said heart-rate-variability parameters to one or more standard scores of heart rate variability by a standard mathematical formula; and an output unit, outputting the standard score of said heart-rate-variability by sound and/or light to aid determining the state of heart rate variability of a subject.

Claims

1. A device that can present heart rate variability, comprising:

a sensor for detecting electrocardiogram signals;

an analog to digital converter for digitalizing electrocardiogram signals;

an operation unit, converting said digitalized electrocardiogram signals to one or more heart rate variability parameters, and further converting said heart rate variability parameters to one or more standard scores of heart rate variability by a standard mathematical formula and out put unit, outputting the standard scores of said heart rate variability by sound and/or color for determining the state of heart rate variability of the examinee.

2. The device according to claim 1, wherein the sensor is the cardiograph sensor.

3. The device according to claim 1, wherein the parameter of said heart rate variability includes high-frequency(HF), low-frequency (LF), total power (TP), ratio of the low-frequency and high-frequency (LF/HF), the percentage that the low frequency occupies the total power of high frequency and low frequency (LF %), heart rate power density spectrum, mean of R-R intervals, standard deviation (SD), root mean square successive difference (RMSSD), Standard Deviation of Normal-to-Normal Intervals (SDNN), Standard Deviation of Standard Deviation of Normal-to-Normal Intervals (SDSD).

4. The device according to claim 1, wherein the color output corresponds to a function to be converted into a series of color change of visible light spectrum.

5. The device according to claim 1, wherein the sound output corresponds to a function to be converted into the sounds with different frequency and frequency modulation.

6. A method of presenting heart rate variability, comprising:

accessing the electrocardiogram signal from the examinee;

converting the electrocardiogram signal to one or more interpretable heart rate variability parameters;

gaining one or more standard score of heart rate variability by a standard mathematical formula according to the heart rate variability parameters; and

converting the heart rate variability standard score to sound and/or color by detecting the state of the heart rate variability of the examinee.

7. The method according to claim 6, wherein the standard mathematical formula is:

SC(x)=(x−

meanx)/SDx, wherein the meanxand the SDx represent the mean and the standard deviation of x respectively, andx may be any kind of heart rate variability parameters.

8. The method according to claim 6, wherein the method further includes a database, used for recording the SDNN, TP, HF, LF/HF, LF % and all kinds of heart rate variability parameter data of all ages, genders and/or all patients, and calculate the mean and the heart rate variability standard score thereof.

9. The method of detecting heart rate variability according to claim 8, wherein the database is used to compile statistics on the heart rate variability standard score from the perspectives of age, gender and/or all kinds of disease along with the strength of the heart rate variability for comparing.

10. The method of detecting heart rate variability according to claim 6, wherein the parameters of the heart rate variability are high-frequency(HF), low-frequency (LF), Total power (TP), ratio of the low-frequency and high-frequency (LF/HF), the percentage that the low frequency occupies the total power of high frequency and low frequency (LF %), heart rate power density spectrum, mean of R-R intervals, standard deviation (SD), RMSSD, SDNN or SDSD.

11. The method according to claim 10, wherein the heart rate power density is gained by converting the electrocardiogram signal using Fourier transfer.

12. The method according to claim 6, wherein the method of detecting heart variability further includes a step of QRS wave screening and/or R-R intervals.