JP2023068216A - Electrocardiogram analysis apparatus and control method of the same - Google Patents

Abstract

To provide an electrocardiogram analysis apparatus capable of providing information characteristic to an electrocardiogram measured over a plurality of days, and a control method of the apparatus.SOLUTION: The electrocardiogram analysis apparatus validates trend display for long-time electrocardiogram in response to determination that a measurement period of electrocardiogram data is equal to or longer than a predetermined time exceeding 24 hours. In the trend display for long-time electrocardiogram, a parameter value calculated from the electrocardiogram data is presented in a three-dimensional graph with axes of a time zone, a date, and a value and thereby provides information characteristic to an electrocardiogram measured over a plurality of days such as a daily difference of the parameter value.SELECTED DRAWING: Figure 3

Description

(1) Date of distribution: February 5, 2021 Place of distribution: Document management system within Fukuda Denshi Co., Ltd. (This system is accessible only to related parties, After the date of distribution, it became possible to distribute to third parties through parties who have access to the system.) Publisher: Fukuda Denshi Co., Ltd. Contents of distribution: Three-dimensional graph of long-term electrocardiogram invented by Yuki Fujiwara PDF data file of the catalog of the product (SCM-9000) equipped with a display function (2) Date of sale: March 26, 2021 Place of sale: Fukuda Denshi Hiroshima Sales Co., Ltd. Publisher: Fukuda Denshi Co., Ltd. Sold Description: Fukuda Denshi Co., Ltd. sold to Fukuda Denshi Hiroshima Sales Co., Ltd. a product (SCM-9000) equipped with a three-dimensional graph display function for long-term electrocardiograms invented by Yuki Fujiwara. (3) Date of sale: March 29, 2021 Place of sale: Matsuyoshi Medical Instruments Co., Ltd. Publisher: Fukuda Denshi Co., Ltd. Contents of items sold: Fukuda Denshi Co., Ltd., Matsuyoshi Medical Instruments Co., Ltd., Fujiwara We sold a product (SCM-9000) equipped with a three-dimensional graph display function related to long-term electrocardiograms invented by Yuki. (4) Date of sale: March 30, 2021 Location of sale: Fukuda Denshi South Tohoku Sales Co., Ltd. Publisher: Fukuda Denshi Co., Ltd. Contents of sale: Fukuda Denshi Co., Ltd. sells Fukuda Denshi South Tohoku Sales shares The company sold a product (SCM-9000) equipped with a three-dimensional graph display function for long-term electrocardiograms invented by Yuki Fujiwara.

(5) Date of sale: March 31, 2021 Place of sale: Fukuda Denshi Nantohoku Sales Co., Ltd. Publisher: Fukuda Denshi Co., Ltd. Contents of product sold: Fukuda Denshi Co., Ltd. sold to Fukuda Denshi South Tohoku Sales Co., Ltd. a product (SCM-9000) equipped with a three-dimensional graph display function for long-term electrocardiograms invented by Yuki Fujiwara. (6) Date of sale: March 31, 2021 Location of sale: Fukuda Denshi Minami Kanto Sales Co., Ltd. Publisher: Fukuda Denshi Co., Ltd. Contents of sale: Fukuda Denshi Co., Ltd. sells Fukuda Denshi Minami Kanto Sales shares The company sold a product (SCM-9000) equipped with a three-dimensional graph display function for long-term electrocardiograms invented by Yuki Fujiwara. (7) Date of sale: May 21, 2021 Place of sale: Fukuda Denshi Minami Kanto Sales Co., Ltd. Publisher: Fukuda Denshi Co., Ltd. Contents of sale: Fukuda Denshi Co., Ltd. sells Fukuda Denshi Minami Kanto Sales shares The company sold a product (SCM-9000) equipped with a three-dimensional graph display function for long-term electrocardiograms invented by Yuki Fujiwara. (8) Date of sale: June 24, 2021 Location of sale: Fukuda Denshi Seibu South Sales Co., Ltd. Publisher: Fukuda Denshi Co., Ltd. Contents of sale: Fukuda Denshi Co., Ltd. sells Fukuda Denshi Seibu South Sales shares The company sold a product (SCM-9000) equipped with a three-dimensional graph display function for long-term electrocardiograms invented by Yuki Fujiwara.

(9) Date of sale: July 20, 2021 Place of sale: Fukuda Denshi West Kanto Sales Co., Ltd. Publisher: Fukuda Denshi Co., Ltd. Contents of sold item: Fukuda Denshi Co., Ltd. sold to Fukuda Denshi West Kanto Sales Co., Ltd. a product (SCM-9000) equipped with a three-dimensional graph display function for long-term electrocardiograms invented by Yuki Fujiwara. (10) Date of sale: July 28, 2021 Place of sale: Fukuda Denshi Hyogo Sales Co., Ltd. Publisher: Fukuda Denshi Co., Ltd. Contents of sale: Fukuda Denshi Co., Ltd. to Fukuda Denshi Hyogo Sales Co., Ltd. , sold a product (SCM-9000) equipped with a three-dimensional graph display function for long-term electrocardiograms invented by Yuki Fujiwara. (11) Date of sale: August 23, 2021 Place of sale: Fukuda Denshi Hokuriku Sales Co., Ltd. Publisher: Fukuda Denshi Co., Ltd. Contents of sale: Fukuda Denshi Co., Ltd. to Fukuda Denshi Hokuriku Sales Co., Ltd. , sold a product (SCM-9000) equipped with a three-dimensional graph display function for long-term electrocardiograms invented by Yuki Fujiwara. (12) Date of loan: August 25, 2021 Place of loan: Fukuda Denshi Keiji Sales Co., Ltd. Publisher: Fukuda Denshi Co., Ltd. Details of loaned items: Fukuda Denshi Co., Ltd. to Fukuda Denshi Keiji Sales Co., Ltd. , lent out a product (SCM-9000) equipped with a three-dimensional graph display function for long-term electrocardiograms invented by Yuki Fujiwara.

(13) Date of loan: September 6, 2021 Place of loan: Fukuda Denshi Keiji Sales Co., Ltd. Publisher: Fukuda Denshi Co., Ltd. Details of loaned item: Fukuda Denshi Co., Ltd. Ltd. lent to Fukuda Denshi Keiji Sales Co., Ltd. a product (SCM-9000) equipped with a three-dimensional graph display function for long-term electrocardiograms invented by Yuki Fujiwara. (14) Date of sale: September 28, 2021 Location of sale: Fukuda Denshi Keiji Sales Co., Ltd. Publisher: Fukuda Denshi Co., Ltd. Contents of sale: Fukuda Denshi Co., Ltd. to Fukuda Denshi Keiji Sales Co., Ltd. , sold a product (SCM-9000) equipped with a three-dimensional graph display function for long-term electrocardiograms invented by Yuki Fujiwara. (15) Date of sale: September 29, 2021 Location of sale: Fukuda Denshi South Tohoku Sales Co., Ltd. Publisher: Fukuda Denshi Co., Ltd. Contents of sale: Fukuda Denshi Co., Ltd. sells Fukuda Denshi South Tohoku Sales shares The company sold a product (SCM-9000) equipped with a three-dimensional graph display function for long-term electrocardiograms invented by Yuki Fujiwara. (16) Date of sale: September 30, 3rd year of Reiwa Place of sale: Fukuda Denshi Keiji Sales Co., Ltd. Publisher: Fukuda Denshi Co., Ltd. Contents of sale: Fukuda Denshi Co., Ltd. to Fukuda Denshi Keiji Sales Co., Ltd. , sold a product (SCM-9000) equipped with a three-dimensional graph display function for long-term electrocardiograms invented by Yuki Fujiwara.

The present invention relates to an electrocardiogram analyzer and its control method.

In order to detect symptoms such as arrhythmia that are difficult to detect by short-term electrocardiogram measurement, long-term electrocardiogram measurement using a Holter electrocardiogram is performed. An electrocardiogram measured by a Holter electrocardiograph is not uniform in quality and includes waveforms of tens of thousands of beats. Therefore, it is common for engineers and doctors to conduct various studies based on the results of automatic analysis by an electrocardiogram analyzer (Patent Documents 1 and 2).

JP 2009-95552 A JP 2020-130335 A

As described in Patent Document 1, the maximum measurement time of a general Holter electrocardiograph is one day (24 hours), but some of them are capable of measuring for a longer period, for example, several days. exist. However, the same automatic analysis is performed for measurements over multiple days (for example, 48 hours or more) and for single-day measurements, and it cannot be said that sufficient studies have been made on automatic analysis specific to measurements over multiple days.

The present invention has been made in view of such problems of the prior art, and one aspect of the present invention provides an electrocardiogram analysis device capable of providing information specific to electrocardiograms measured over a plurality of days and a control method thereof.

The above-mentioned objects are provided by acquisition means for acquiring electrocardiogram data, determination means for determining whether the measurement period of the electrocardiogram data is longer than or equal to a predetermined time exceeding 24 hours, and determination means that the measurement period is longer than or equal to the predetermined time. and control means for enabling the long-term ECG trend display in response to determination by the long-term ECG trend display, wherein the long-term ECG trend display changes the values of the parameters calculated from the ECG data to the time period, This is achieved by an electrocardiogram analysis device characterized by a trend display presented in a three-dimensional graph having date and value axes.

With such a configuration, according to the present invention, it is possible to provide an electrocardiogram analysis apparatus capable of providing information unique to electrocardiograms measured over a plurality of days, and a control method thereof.

1 is a block diagram showing a functional configuration example of a general-purpose computer as an example of an electrocardiogram analysis apparatus according to an embodiment of the present invention; FIG. FIG. 4 is a diagram showing an example of a two-dimensional graph presented by the electrocardiogram analysis apparatus according to the embodiment; FIG. 4 is a diagram showing an example of a three-dimensional graph presented by the electrocardiogram analysis device according to the embodiment; FIG. 5 is a diagram showing another example of a three-dimensional graph presented by the electrocardiogram analysis device according to the embodiment;

The invention will now be described in detail on the basis of its exemplary embodiments with reference to the accompanying drawings. In addition, the following embodiments do not limit the invention according to the scope of claims. In addition, although a plurality of features are described in the embodiments, not all of them are essential to the invention, and the plurality of features may be combined arbitrarily. Furthermore, in the accompanying drawings, the same or similar configurations are denoted by the same reference numerals, and redundant description is omitted.

In the following embodiments, the case where the present invention is implemented by a general-purpose computer such as a personal computer or a tablet terminal will be described. However, the present invention can be implemented in any electronic device such as media players, smart phones, game consoles, and the like.

FIG. 1 is a block diagram showing a functional configuration example of a general-purpose computer 100 that can function as an electrocardiogram analysis apparatus according to this embodiment. The CPU 1 functioning as a control unit, for example, reads a program stored in the storage device 10 to the RAM 3 and executes it, thereby realizing a function according to the program. For example, the general-purpose computer 100 functions as an electrocardiogram analysis apparatus according to this embodiment by executing a specific application program (electrocardiogram analysis application) while the basic software (OS) is running on the general-purpose computer 100 .

The storage device 10 is, for example, a hard disk drive (HDD) or solid state drive (SSD), and stores basic software (OS), device drivers, applications, user data, and the like. The storage device 10 also stores GUI (graphical user interface) data for displaying menu screens and the like, user setting data, application initial setting data, and the like.

The ROM 2 stores programs, firmware, and various setting information necessary for starting the computer, such as a bootstrap loader. At least part of the ROM 2 may be rewritable.

The RAM 3 is used as an area for expanding programs executed by the CPU 1 and as a temporary storage area for variables, data, and the like. Also, part of the RAM 3 may be used as a video memory.

The memory card 4 is a recording medium that can be inserted into and removed from the card slot 5 , and the general-purpose computer 100 can read data from the memory card 4 inserted into the card slot 5 and write data to the memory card 4 . In this embodiment, the general-purpose computer 100 acquires data such as long-term electrocardiograms recorded by a Holter electrocardiograph through the memory card 4 . The general-purpose computer 100 may acquire electrocardiogram data to be automatically analyzed by other methods. For example, even if the electrocardiogram data to be automatically analyzed is acquired from the Holter electrocardiograph that performed the measurement or from another external device 200 that holds the measured electrocardiogram data, through communication through the communication interface 20, which will be described later. good.

The display unit 6 has a display device such as a liquid crystal display (LCD) or an organic EL display, a display control circuit, and the like. Although FIG. 1 shows a configuration in which the display unit 6 is built in the general-purpose computer 100, the display unit 6 may be externally attached. Also, both the built-in display unit 6 and the external display unit 6 may be included.

The operation unit 8 is a device for a user to input instructions to the general-purpose computer 100, and is typically one or more input devices such as a keyboard, pointing device (mouse, etc.), contact sensing device (touch panel, etc.). Note that the keyboard may be a hardware keyboard or a software keyboard. The touch panel may be provided on the display unit 6, or may be in the form of a touch pad that is commonly found in notebook computers.

A communication interface (I/F) 20 is hardware for the general-purpose computer 100 to communicate with an external device 200 according to a predetermined standard. The communication I/F 20 has a configuration corresponding to the supported communication standard, such as a connector conforming to the wired communication standard and a wireless transmitter/receiver conforming to the wireless communication standard. The communication I/F 20 may support multiple communication standards. The communication standards supported by the communication I/F 20 are not particularly limited, but Ethernet (registered trademark) and USB are wire communication standards, and Bluetooth (registered trademark) and wireless LAN (IEEE802.11x) are wireless communication standards. is a typical example.

A user (for example, a technician) who uses automatic analysis of an electrocardiogram measured by a Holter electrocardiograph activates an automatic analysis application stored in the storage device 10 by an operation method corresponding to the OS running on the general-purpose computer 100. . The CPU 1 reads the automatic analysis application from the storage device 10 to the RAM 3 and executes it, so that the general-purpose computer 100 functions as an electrocardiogram analysis device. The general-purpose computer 100 that functions as an electrocardiogram analysis device is hereinafter referred to as an electrocardiogram analysis device 100 .

Next, the operation of the electrocardiogram analysis apparatus 100 realized by the CPU 1 executing the automatic analysis application will be described. The CPU 1 acquires a data file storing electrocardiogram data to be automatically analyzed according to an operation from the operation unit 8 . The CPU 1 presents, for example, a file browser screen provided by the OS on the display unit 6, and allows the user to designate a data file to be acquired. Alternatively, the CPU 1 may search a predetermined location such as the memory card 4 and automatically acquire a data file (for example, a data file having a predetermined file name) that meets predetermined conditions.

The CPU 1 saves the acquired data file in the storage device 10 . It should be noted that instead of acquiring the entire data file all at once, a certain amount of electrocardiogram data stored in the data file may be acquired. In this embodiment, electrocardiogram data is assumed to be digital data A/D-converted under predetermined conditions. In addition, there is no particular limitation on the type and number of leads included in the electrocardiogram data, and one or more of the leads measured by a general Holter electrocardiograph, such as NASA lead, CC5 lead, and CM5 lead, may be used. , standard 12-lead. It is also assumed that the electrocardiogram data measurement period is a predetermined time exceeding 24 hours (for example, 27 hours, 2 days, 1 week, etc.).

The CPU 1 first applies quality check processing to the electrocardiogram data to detect defective signal sections unsuitable for analysis. The CPU 1 evaluates, for example, a baseline level and superimposed noise, and determines sections where the superimposed level exceeds a threshold value and noise sections as bad signal sections and excludes them from analysis processing. When multiple channels (leads) are being measured by the Holter monitor, the CPU 1 applies quality check processing to the data of each channel.

The CPU 1 applies quality check processing to all data from the start to the end of measurement, and converts information that can identify the detected defective signal section (eg start date and time and end date and time of the section) into data file identification information (eg file name). , and stored in the storage device 10 . The CPU 1 applies the subsequent processing to a section (called an analysis target section or effective signal section) of the electrocardiogram data excluding the defective signal section.

Next, the CPU 1 detects QRS segment candidates from the electrocardiogram data. When multiple channels (leads) are measured by the Holter electrocardiograph, the CPU 1 detects QRS segment candidates for the data of each channel. Then, the CPU 1 detects the candidate determined to be highly reliable as the final QRS segment. Reliability can be determined, for example, based on one or more of signal quality, noise contamination, validity of RR intervals, whether other leads are also detected, and the like.

Then, the CPU 1 obtains a feature amount (parameter) based on the QRS interval. Parameters to be obtained here include, but are not limited to, the RR interval (RRI) of adjacent QRS segments, the width of the QRS segment, the height of the QRS segment, the direction of the QRS segment, and the area of the QRS segment. Furthermore, the CPU 1 can calculate other parameters from parameters based on the QRS interval. In this embodiment, as an example, a parameter relating to heart rate variability (HRV) is calculated based on RRI time-series data.

There is no particular limitation on the types of parameters related to HRV to be calculated, and any known parameters can be calculated. CPU1, for example, frequency domain parameters (eg, one or more of VLF, LF, HF, LF/HF, CVVLF, CVLF, CVHF, CVLF/HF) and time domain parameters (eg, AVNN, SDNN, CVNN, RR50(+ ) can be calculated.

For example, the CPU 1 obtains a power spectrum by applying a fast Fourier transform (FFT) to an RR curve obtained by spline-interpolating RRI time-series data. Then, the power (integrated value) for each predetermined frequency band in the power spectrum is calculated as VLF, LF, and HF. For example, VLF is power in a frequency band of 0.0033-0.04 Hz, LF is 0.04-0.14 Hz, and HF is power in a frequency band of 0.14-0.4 Hz.

AVNN, SDNN, and CVNN are the average value, standard deviation, and SDNN/AVNN (%) of RRI per 24 hours, respectively. RR50(+) is the number of occurrences per 24 hours of RRIs that differ by more than 50 ms.

Parameters related to HRV are used for evaluation of the autonomic nervous system (sympathetic nervous system and parasympathetic nervous system), prediction of occurrence of ventricular tachycardia and ventricular fibrillation, and the like.

Further, in the present embodiment, the CPU 1 calculates a parameter based on the day difference and the day difference for one or more calculated parameters. As described above, the measurement by the Holter electrocardiograph is generally performed for about 24 hours. Therefore, even for electrocardiograms measured over multiple days, the 24-hour unit analysis is repeated for several days, No evaluation was made between data measured on different days, such as day difference.

When the CPU 1 acquires electrocardiogram data measured over a plurality of days, in addition to the previous parameter calculations, the CPU 1 calculates daily differences in the parameters and parameters based on the daily differences. The parameter day difference is the difference between the parameter values corresponding to the same time on consecutive dates. In addition, the parameter based on the daily difference may be, for example, the time when the daily difference is maximum and minimum in two consecutive days, the maximum value, the minimum value, the average value of the daily difference in the entire measurement period, etc. However, it is limited to these. not.

The CPU 1 stores all the calculated parameters and RRI time-series data in the storage device 10 in association with the electrocardiogram data or the identification information (file name, etc.) of the electrocardiogram data. In this embodiment, the CPU 1 determines electrocardiogram data having a measurement period longer than a predetermined period of time exceeding 24 hours as electrocardiogram data measured over a plurality of days.

The daily difference of the same parameter and the parameter based on the daily difference are information that cannot be obtained by 24-hour measurement, but can be obtained only by measurement over multiple days. For example, with respect to parameters related to HRV, it is possible to grasp the time at which the daily difference becomes large, the fluctuation of the daily difference depending on the day of the week, and the like. As a result, it is possible to provide information that is expected to be used in new ways, such as grasping the time of day and day of the week to which attention should be paid for each subject.

Further, when the CPU 1 acquires electrocardiogram data measured over a plurality of days, in addition to the previous parameter calculations, the CPU 1 calculates daily differences in the parameters and parameters based on the daily differences. Therefore, it is possible to provide the user with information that cannot be obtained from 24-hour measurement, but that can only be obtained from measurement over multiple days.

The CPU 1 provides a function of trend display that presents changes in parameter values over time over the entire measurement period using a two-dimensional graph using one continuous time axis and value axis. Furthermore, the CPU 1 has, as a trend display function specific to the electrocardiogram data measured over a plurality of days, a first time axis indicating a time period, a second time axis indicating a date orthogonal to the first time axis, and a It provides a function to display trends in a three-dimensional graph using axes.

FIG. 2 is a diagram showing an example of a two-dimensional graph 250 presented on the display unit 6 by the trend display function provided by the electrocardiogram analysis apparatus 100. As shown in FIG. Shown here as an example is a two-dimensional graph 250 that provides a trend display of five parameters in the frequency domain for HRV.

The temporal change (trend) of the value of each parameter has a form in which the parameter value is plotted on a two-dimensional graph with the horizontal axis as the time axis and the vertical axis as the value axis. Parameters to be trend-displayed are switched according to the operation of pull-down menus 252 and 254 . A pull-down menu 252 switches between frequency domain parameters and time domain parameters for trend display. A pull-down menu 254 is displayed only when a frequency domain parameter is specified in the pull-down menu 252, and switches between parameters based on the power spectrum and its fluctuation coefficient (CCV).

When the CPU 1 determines that the measurement period of the electrocardiogram data is equal to or longer than a predetermined time exceeding 24 hours, the CPU 1 validates the trend display for the long-term electrocardiogram and causes the long-term trend button 256 to be displayed. When the long-term trend button 256 is operated, the display is switched to a long-term electrocardiogram trend display using a three-dimensional graph.

FIG. 3 is a diagram showing an example of a three-dimensional graph 300 presented on the display unit 6 by the electrocardiogram analysis apparatus 100. As shown in FIG. Here, a three-dimensional graph presenting the parameter HF for HRV calculated based on electrocardiogram data measured over two weeks (14 days) is shown. However, the user can arbitrarily select the parameters presented using the three-dimensional graph.

The three-dimensional graph 300 has orthogonal XYZ axes, with parameter values plotted on the Z axis. The X-axis plots time zones (time ranges), and the Y-axis plots dates at predetermined equal intervals. Since the time zone of the X-axis is common to all dates, the change in the Y-axis direction of the parameter value corresponding to any X-coordinate represents the day-to-day variation of the parameter value at the time corresponding to the X-coordinate.

Coordinates of adjacently plotted parameters are connected by straight lines in both the time axis (X axis) direction and the date axis (Y axis) direction. From the slope of this straight line, it is possible to intuitively grasp changes over time and changes over time within the same day.

In addition, the parameter values are divided into a plurality of levels (ranges) based on the maximum value over the entire measurement period, and different display colors are used for each range of parameter values. Therefore, it is possible to intuitively grasp the tendency of dates and times in which large values and small values are obtained.

FIG. 3 shows a linear cursor 310 highlighting the parameter value corresponding to a particular X-coordinate (ie, time) within the three-dimensional graph 300 and the connecting straight line between the parameter values. In FIG. 2, a cursor 310 is shown highlighting the parameter value corresponding to 7:00 am each day from April 1st to April 14th, which is the measurement period.

The X coordinate for displaying the cursor 310 can be determined according to the operation of designating one point in the graph. Alternatively, the X coordinate may be determined according to the time designated through the operation unit 8 . Further, the cursor 310 can be moved in the X-axis direction by operating the operation unit 8 (for example, pressing a direction key). Cursor 310 makes it easier to grasp the daily difference in the parameter value corresponding to a specific time within the measurement period.

In addition, electrocardiogram analysis apparatus 100 obtains the maximum value (Max) and the minimum value (Min) of the parameter values for a plurality of days corresponding to the time when cursor 310 is displayed, and the parameter values of the previous day. Find the day with the maximum difference between . Then, the electrocardiogram analysis apparatus 100 displays indices of the maximum value (Max), the minimum value (Min), and the maximum difference (MaxΔ) of the parameters near the plotted positions of the corresponding parameter values. As shown in FIG. 2, a line connecting the index and the position on the cursor 310 may be displayed to clarify the plot location to which the index points.

Furthermore, the electrocardiogram analysis apparatus 100 changes the display magnification (scale) and viewpoint of the three-dimensional graph 300 according to the operation of the operation unit 8 . Therefore, the user can observe the three-dimensional graph 300 at any magnification and viewpoint at which the daily difference in parameter values at a desired time can be easily visually recognized.

A trend display using a three-dimensional graph can be displayed simultaneously for multiple parameters. FIG. 4 is a diagram showing an example of a screen 400 that displays trend displays of four parameters in a three-dimensional graph so that they can be compared. The types of parameters presented in individual three-dimensional graphs can be set and changed by operating pull-down menu 410 through operation unit 8 . When electrocardiogram analysis apparatus 100 detects an operation to change the display magnification and viewpoint for one of the four three-dimensional graphs included in screen 400, the other three three-dimensional graphs are also interlocked according to the settings. to change the display magnification and viewpoint, or not.

As described above, according to the present embodiment, it is possible to realize an electrocardiogram analysis apparatus that can provide the user with unique and useful information that cannot be obtained from measurements within 24 hours from electrocardiogram data measured over multiple days.

(Other embodiments)
The present invention can also be implemented as a program that causes a computer to function as the electrocardiogram analysis apparatus described in the above embodiments. Moreover, the present invention is not limited to the content of the above-described embodiments, and various modifications and variations are possible without departing from the spirit and scope of the invention. Accordingly, the claims are appended to make public the scope of the invention.

DESCRIPTION OF SYMBOLS 100... General-purpose computer (electrocardiogram analysis apparatus), 1... CPU, 4... Memory card, 10... Storage device, 200... External device

Claims (10)

Acquisition means for acquiring electrocardiogram data;
determination means for determining whether or not the measurement period of the electrocardiogram data is longer than or equal to a predetermined time exceeding 24 hours;
a control means for enabling trend display for a long-term electrocardiogram in response to the determination by the determination means that the measurement period is equal to or longer than the predetermined time,
The electrocardiogram analysis, wherein the trend display for the long-term electrocardiogram is a trend display that presents the parameter values calculated from the electrocardiogram data in a three-dimensional graph having time zone, date, and value axes. Device. 2. The three-dimensional graph according to claim 1, wherein coordinates of parameters plotted adjacent to each other are connected by straight lines in the time zone axis direction and the date axis direction. electrocardiogram analyzer. 2. The electrocardiogram analysis apparatus according to claim 1, wherein the three-dimensional graph uses different display colors according to the range of values. 4. The electrocardiogram analysis apparatus according to claim 3, wherein said value range is determined based on the maximum value of said parameter within said measurement period. 5. The method according to any one of claims 1 to 4, further comprising a linear cursor extending in the date axis direction along the three-dimensional graph and movable in the time zone axis direction. The electrocardiogram analysis device described. An index indicating the magnitude of the difference is further displayed in the vicinity of the plotted position of the value having the greatest difference from the previous day's value, among the plurality of values of the parameter at the time indicated by the cursor. The electrocardiogram analysis apparatus according to claim 5. The electrocardiogram analysis apparatus according to any one of claims 1 to 6, wherein the parameter is a parameter relating to heart rate variability (HRV). 8. The electrocardiogram analysis apparatus according to any one of claims 1 to 7, wherein the three-dimensional graphs for each of a plurality of parameters can be displayed for comparison. an acquisition step of acquiring electrocardiogram data;
a determination step of determining whether the measurement period of the electrocardiogram data is longer than or equal to a predetermined time exceeding 24 hours;
a control step of enabling trend display for a long-term electrocardiogram in response to the determination in the determination step that the measurement period is equal to or longer than the predetermined time;
The electrocardiogram analysis, wherein the trend display for the long-term electrocardiogram is a trend display that presents the parameter values calculated from the electrocardiogram data in a three-dimensional graph having time zone, date, and value axes. How to control the device. A program for causing a computer to function as each means of the electrocardiogram analysis apparatus according to any one of claims 1 to 8.

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