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EP0565084A2
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A method and system for heart rate variability analysis
Assignee: Spacelabs Medical Inc
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Filing: 1993-04-07
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Granted: —
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Expires: 2013-04-07
Abstract
Abstract A method and system for heart rate variability analysis is provided. In a preferred embodiment, a computer system generates various statistical and spectral measurements of heart rate variability based on user-specified qualifications and displays the results. The computer system includes a statistical and spectral data component. The statistical component of the computer system includes a storage device for storing electrocardiographic data, an interval detector for determining the length of heart beat intervals in the electrocardiographic data, a minute data generator for accumulating statistical measurements based on the intervals and user-specified qualifications, a period data generator for accumulating statistical data measurements based on the generated minute data and user-specified time period and qualifications, a region data generator for accumulating statistical measurements based on the generated minute data in a user-specified region of time, and a display controller for displaying the period data and region data. The spectral component of the computer system includes a data storage device for storing electrocardiographic data, an interval detector for determining the length of heart beat intervals in the electrocardiographic data, an instantaneous interval function data generator for generating instantaneous interval function data based on the interval data and user-specified qualifications, a filter and resampler for generating resampled data by filtering and resampling the instantaneous interval function data, a power spectral density data generator for generating spectral density data based on the resampled data and user-specified qualifications, a period spectral data generator for accumulating period and region spectral data measurements based on the generated power spectral density data, a time period, and user-specified qualifications, and a display controller for displaying period data and region data. In a preferred embodiment, the present invention allows a user to specify minimum and maximum beat interval times, whether intervals near atrial and ventricular ectopic beats should be disregarded, the time period over which data is to be accumulated, the difference margins for beat triplets, the region of time over which data is accumulated, and whether data is to be displayed in graphical or tabular format.
Inventors
- 👤 Jeffrey J. Gilham
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 23:45
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/24; A61B5/316; A61B5/318; A61B5/333; A61B5/335; A61B5/02; A61B5/024; A61B5/02405; A61B5/74; A61B5/742; A61B5/0245; A61B5/72; A61B5/7235; A61B5/7253; A61B5/7257
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
112 words
A computer system for heart rate variability analysis of electrocardiographic data, the system comprising: a storage device having means for storing electrocardiographic data; an interval detector for determining the length of heart beat intervals in the electrocardiographic data; a minute data generator for accumulating statistical measurements based on the heart beat intervals and user-specified qualifications; a period data generator for accumulating statistical data measurements based on the generated minute data, a time period, and user-specified qualifications; a region data generator for accumulating statistical measurements based on the generated minute data and a region of time; and a display controller for displaying the period data and region data on a computer display device.
Claim 2
Dependent Claim
40 words
The computer system of claim 1 wherein the user-specified qualifications include a minimum and a maximum interval time, wherein intervals with interval times less than the minimum and greater than the maximum are not used to generate the minute data.
Claim 3
Dependent Claim
38 words
The computer system of claim 1 wherein the user-specified qualifications include a number of intervals before an atrial ectopic beat, wherein the number of intervals before an atrial ectopic beat are not used to generate the minute data.
Claim 4
Dependent Claim
38 words
The computer system of claim 1 wherein the user-specified qualifications include a number of intervals after an atrial ectopic beat, wherein the number of intervals after an atrial ectopic beat are not used to generate the minute data.
Claim 5
Dependent Claim
38 words
The computer system of claim 1 wherein the user-specified qualifications include a number of intervals before a ventricular ectopic beat, wherein the number of intervals before a ventricular ectopic beat are not used to generate the minute data.
Claim 6
Dependent Claim
38 words
The computer system of claim 1 wherein the user-specified qualifications include a number of intervals after a ventricular ectopic beat, wherein the number of intervals after a ventricular ectopic beat are not used to generate the minute data.
Claim 7
Dependent Claim
53 words
The computer system of claim 1 wherein the user-specified qualifications include a minimum number of intervals per minute, wherein when the period data generator determines that a minute of electrocardiographic data has less than the minimum number of intervals, then minute data from that minute is not used to generate interval period data.
Claim 8
Dependent Claim
53 words
The computer system of claim 1 wherein the user-specified qualifications include a minimum number of triplets per minute, wherein when the period data generator determines that a minute of electrocardiographic data has less than the minimum number of triplets, then minute data from that minute is not used to generate difference period data.
Claim 9
Dependent Claim
41 words
The computer system of claim 1 wherein the user-specified qualifications include a difference margin for the difference in time of intervals that comprise a triplet, wherein when the difference exceeds the difference margin, the triplet will be used to compute %RRxx.
Claim 10
Dependent Claim
52 words
The computer system of claim 1 wherein the period data is displayed in tabular format on the computer display device in response to a user selection of tabular format and the period data is displayed in graphic format on the computer display device in response to the user selection of graphical format.
Claim 11
Dependent Claim
28 words
The computer system of claim 1 wherein the user-specified qualifications include the number of minutes of minute data to be accumulated into one time period of period data.
Claim 12
Dependent Claim
27 words
The computer system of claim 1 wherein the display controller includes means for simultaneously displaying on the computer display device generated region data and generated period data.
Claim 13
Dependent Claim
31 words
The computer system of claim 12 including: means for receiving a user-specified region of time; and means for updating displayed region data in response to receiving a user-specified region of time.
Claim 14
Dependent Claim
37 words
The computer system of claim 1 wherein when period data corresponds to a period within a user-specified region of time, then the period data is displayed with an indicator that the period is within the user-specified region.
Claim 15
Dependent Claim
38 words
The computer system of claim 14 wherein when period data corresponds to periods not within the user-specified region of time, then the period data is displayed with an indicator that the period is not within the user-specified region.
Claim 16
Dependent Claim
23 words
The computer system of claim 1 wherein period data that corresponds to periods not within a user-specified region of time is not displayed.
Claim 17
Dependent Claim
150 words
A computer system for heart rate variability analysis of electrocardiographic data, the system comprising: a storage device having means for storing electrocardiographic data; an interval detector for determining the length of heart beat intervals in electrocardiographic data; an instantaneous interval function generator for generating instantaneous interval function data based on the interval data and user-specified qualifications; a filter and resampler for generating resampled data by filtering and resampling the instantaneous interval function data; a power spectral density data generator for generating spectral density data based on the resampled data, a time base specifying the period over which the data is generated, and user-specified qualifications; a period spectral data generator for accumulating period spectral data measurements and region spectral data measurements based on the generated power spectral density, a time period, and user-specified qualifications; and a display controller for displaying the period data and region data on a computer display device.
Claim 18
Dependent Claim
68 words
The computer system of claim 17 wherein the user-specified qualifications include a minimum and a maximum interval time, wherein a first interval with an interval time that is between the minimum and maximum interval times has its interval time increased by the interval time of a second interval when the interval time of the second interval is less than the minimum or greater than the maximum interval time.
Claim 19
Dependent Claim
40 words
The computer system of claim 17 wherein the user-specified qualifications include a number of intervals before an atrial ectopic beat, wherein the number of intervals before an atrial ectopic beat are not used to generate the instantaneous interval function data.
Claim 20
Dependent Claim
40 words
The computer system of claim 17 wherein the user-specified qualifications include a number of intervals after an atrial ectopic beat, wherein the number of intervals after an atrial ectopic beat are not used to generate the instantaneous interval function data.
Claim 21
Dependent Claim
40 words
The computer system of claim 17 wherein the user-specified qualifications include a number of intervals before a ventricular ectopic beat, wherein the number of intervals before a ventricular ectopic beat are not used to generate the instantaneous interval function data.
Claim 22
Dependent Claim
40 words
The computer system of claim 17 wherein the user-specified qualifications include a number of intervals after a ventricular ectopic beat, wherein the number of intervals after a ventricular ectopic beat are not used to generate the instantaneous interval function data.
Claim 23
Dependent Claim
15 words
The computer system of claim 17 wherein the time base is a user-specified time base.
Claim 24
Dependent Claim
59 words
The computer system of claim 17 wherein the user-specified qualifications include a percent of valid data, and wherein when a time base of data has less than the percent of valid data, then the period spectral data generator excludes the power spectral density data for that time base from the accumulation of power spectral density data for the period.
Claim 25
Dependent Claim
24 words
The computer system of claim 17 wherein the user-specified qualifications include frequency ranges, wherein the computer system accumulates total power within each frequency range.
Claim 26
Dependent Claim
22 words
The computer system of claim 17 wherein the display controller displays a graph of the period data on the computer display device.
Claim 27
Dependent Claim
35 words
The computer system of claim 17 wherein when period data corresponds to a period within a user-specified region, then the period data is displayed with an indicator that the period is within the user-specified region.
Claim 28
Dependent Claim
32 words
The computer system of claim 17 wherein the user-specified qualifications indicate that the period data is to include an accumulation of the power spectral density data for all of the electrocardiographic data.
Claim 29
Dependent Claim
25 words
The computer system of claim 17 wherein graphs of the power spectral density data for successive time periods are automatically displayed at a user-specified rate.
Claim 30
Dependent Claim
24 words
The computer system of claim 17 wherein the display controller displays total power spectral density data for a user-specified frequency range in graphical format.
Claim 31
Dependent Claim
24 words
The computer system of claim 17 wherein the display controller displays the ratio of the total power of two frequency ranges in graphical format.
Claim 32
Dependent Claim
27 words
The computer system of claim 17 wherein the display controller including means for simultaneously displaying on the computer display device generated region data and generated period data.
Claim 33
Dependent Claim
31 words
The computer system of claim 32 including: means for receiving a user-specified region of time; and means for updating displayed region data in response to receiving a user-specified region of time.
References Cited (Backward Citations)
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