JP6139133B2 - Electrocardiograph - Google Patents

Description

The present invention relates to an electrocardiograph, in particular, an electrocardiogram consisting induction signal group, to simultaneously obtainable ECG from a plurality of subjects.

Conventionally, an electrocardiogram has been widely used as a diagnostic index for heart disease, and preparations for starting recording of an electrocardiogram by an electrocardiograph are roughly performed in the following procedure.
・ Apply jelly, cream, etc., to increase conductivity at the electrode mounting position. ・ Install each electrode at a predetermined position. ・ Check for abnormalities such as electrode dislocation based on the waveform display (or an electrocardiograph Confirm that no abnormalities such as detachment are detected)
・ Instruct to start recording

  An electrocardiogram represents the electrical activity of the heart and records changes in multiple leads (electrical signals) acquired at different electrode positions. When recording the most common standard 12-lead ECG, it is necessary to wear a total of ten electrodes, one for each of the subject's limbs and one for each of the six chests. In addition to the large number of breast electrodes, especially the chest electrode must be mounted at a predetermined position between the 4th and 5th ribs. Take it.

  In addition, it is necessary to perform recording in a state where the electrode is stably attached to the body surface, but it takes time until the electrode is stably attached. For example, in general, four electrodes for limb guidance (I, II, III, aVR, aVL, aVF) are attached to the limb, and then six for chest guidance (V1, V2, V3, V4, V5, V6). The electrodes are often worn in order, but the electrodes on the limbs are large and the clip shape sandwiches the limbs and is strongly pressed against the body surface. Since the structure is often mounted on the body surface with a material, the pressing force on the body surface is weaker than the electrodes of the limbs, and it takes time until the potential becomes stable.

  When a large number of subjects must be recorded in a short period of time, such as in a mass screening, when recording preparation for the next subject is started after the completion of one person's recording, the recording preparation time × Because the time for the number of people is not recorded, it takes time.

  In order to reduce the time required for ECG recording for multiple subjects, a configuration in which a plurality of electrode groups can be connected, the ECG being acquired from each electrode group is stored in RAM while being displayed in real time, and recording is instructed There has been proposed an electrocardiograph capable of reading out an electrocardiogram for a fixed time in the past from the time of inputting a recording instruction acquired from the electrode group, which can be printed out (Patent Document 1).

  In the electrocardiograph described in Patent Document 1, for example, while two sets of electrode groups are connected and recording is performed using one electrode group, preparation for recording for another subject, particularly time-consuming electrode mounting, is performed. When the ECG printout of one subject is completed in parallel, the printout of the other subject is instructed to efficiently use the electrocardiograph and reduce the recording time. There is an advantage that you can.

Japanese Patent Laid-Open No. 5-220122

  The electrocardiograph described in Patent Document 1 has a function of displaying the induced waveforms acquired from each of a plurality of electrode groups in real time, but the printed electrocardiogram is older than the displayed one The display and recording (printout) cannot be synchronized. That is, the recorded electrocardiogram cannot be confirmed on the display unit during recording.

  In addition, electrocardiograms (induction signal groups) acquired from each of the plurality of electrode groups are displayed equally for each electrode group. For this reason, it is not possible to immediately grasp which display of the current electrocardiogram corresponding to the electrocardiogram being printed out.

  In addition, before recording an electrocardiogram, it is necessary to confirm that there is no influence such as poor contact or disconnection of electrodes (hereinafter collectively referred to as electrode displacement) or noise for all leads. However, since the electrocardiogram from each electrode group is displayed for each area obtained by dividing one display section into a plurality of areas, the display area per induced waveform is reduced. For example, for the most basic standard 12-lead ECG, it is necessary to display 12 lead waveforms for each electrode group so that the user can confirm from the lead waveform whether recording can be started. The display area of the induced waveform is considerably reduced. As a result, it may not always be easy to determine from the waveform display whether the electrodes are properly mounted.

  An object of the present invention is to provide an electrocardiograph capable of further improving the recording efficiency of an electrocardiogram for a plurality of subjects by solving one or more of the problems of the prior art.

The above-described object is an electrocardiograph capable of simultaneously obtaining an electrocardiogram composed of a group of induction signals from a plurality of subjects, and records one of a plurality of electrocardiograms being simultaneously obtained from the plurality of subjects. Recording means and control means for controlling the display of the electrocardiogram in the display device, and the control means, when the recording means starts recording any one of the plurality of electrocardiograms, the display area of the recorded electrocardiogram the size, or smaller than the size of the display area of the electrocardiogram which is not recorded, either do not displayed electrocardiogram recorded by an electrocardiograph, characterized in that to perform the hand of Achieved.

  With such a configuration, according to the present invention, an electrocardiograph capable of further improving the recording efficiency of the electrocardiogram for a plurality of subjects can be provided.

It is a block diagram which shows the function structural example of the electrocardiograph which concerns on embodiment of this invention. It is a perspective view showing typically an example of appearance of an electrocardiograph concerning the embodiment of the present invention. It is a flowchart for demonstrating operation | movement of the electrocardiograph which concerns on embodiment of this invention. It is a figure explaining the example of the display control in the electrocardiograph which concerns on embodiment of this invention. It is a figure explaining the example of the display control in the electrocardiograph which concerns on embodiment of this invention. It is a figure explaining another example of the display control in the electrocardiograph concerning the embodiment of the present invention.

Hereinafter, the present invention will be described in detail based on preferred embodiments with reference to the accompanying drawings.
(Device configuration)
FIG. 1 is a block diagram showing a functional configuration example of an electrocardiograph according to an embodiment of the present invention.
The arithmetic control unit 10 controls the overall operation of the electrocardiograph of this embodiment. The arithmetic control unit 10 is a general-purpose computer device having, for example, a CPU, ROM, RAM (including non-volatile RAM) and various interfaces (not shown). When the CPU executes the control program stored in, various operations described below are executed and controlled. Here, not all is processed by software, but at least a part thereof may be realized by hardware.

  The arithmetic control unit 10 also stores a display unit 70 that can display various operation guidance, measurement results, and diagnostic indicators, a recording unit 75 that can record and output measurement results and diagnostic indicators, a measurement result, and diagnostic indicators, for example, A storage unit 80 composed of a hard disk drive, a writable optical disk drive, a nonvolatile semiconductor memory, etc., a voice generation unit 85 capable of outputting voice guidance output and various notification sounds, a keyboard, a mouse, a button, a touch panel, etc. An input / instruction unit 90 that enables input and instruction is connected.

  In addition to this, a wired and / or wireless communication interface for communicating with other devices, a storage device using a removable medium, and the like may be provided. Further, the display unit 70 and the recording unit 75 may be separately connectable to the outside. That is, apart from the display unit 70 and the recording unit 75 built in the apparatus main body, an external display device having a larger display area and / or a larger display color, or an external recording device having a larger print area and / or a larger print color. Can be connected. Thereby, the miniaturization of the main body and the diversity of output can be realized at the same time. In this case, a known display interface and printer interface may be provided.

The first electrocardiogram signal detection unit 204 detects the leads constituting the electrocardiogram from the electrodes 24a and 24b attached to the chest and limbs. The first electrocardiogram signal detection unit 204 includes a filter, an amplifier, an A / D converter, and the like, and outputs each lead as digital data having a predetermined sampling rate and the number of bits. For convenience the two electrodes 24a in FIG. 1 shows the 24b, the actual number of electrodes in response to induction to detect changes, ten electrodes as described above in the case of a standard 12-lead Is used.

  The second electrocardiogram signal detection unit 205 has the same configuration as the first electrocardiogram signal detection unit 204. The electrocardiograph according to the present embodiment has a plurality of electrocardiogram signal detection units, and thus can obtain an electrocardiogram from a plurality of subjects at the same time. In the following description, the electrodes 24a and 24b connected to the first electrocardiogram signal detection unit 204 are collected together, and the electrode group 24 and the electrodes 25a and 25b connected to the second electrocardiogram signal detection unit 204 are collected together. This is referred to as an electrode group 25.

  The first and second heart sound detection units 202 and 203 supply the heart sound signal of the subject detected using the heart sound microphones 22 and 23 to the arithmetic control unit 10. The heart sound signal is mainly used to determine the start time of the pulse wave in the heart. The first and second heart sound detectors 202 and 203 and the heart sound microphones 22 and 23 are not essential for the electrocardiograph of this embodiment.

  The identification display unit 71 is a small display device such as a color LED, for example, and is provided in the same number as the electrode group that can be mounted. Also, the correspondence with the electrode group is arranged at a clear position. For example, when the electrode group can be connected to the left and right of the apparatus main body, or to the left and right of the apparatus main body, it can be provided near the connector for connecting the electrode group. The identification display unit 71 is used for notifying each electrode group of information such as the currently displayed / recorded electrode group, the electrode displacement, and the presence / absence of noise depending on the presence / absence of lighting and the type of color.

  The electrocardiograph of the present embodiment can simultaneously acquire electrocardiograms of a plurality of subjects from a plurality of electrocardiogram signal detection units and display them on the display unit 70 in parallel and in real time. If there is an electrocardiogram being recorded by the recording unit 75 so that the electrocardiogram recorded by the recording unit 75 can be easily discriminated from among a plurality of displayed electrocardiograms, the recording is not performed. The display mode of the electrocardiogram is changed when it is not performed.

  In addition, by performing the display on the identification display unit 71 in parallel, even if the user cannot see the waveform display on the display unit 70, it is possible to obtain information on the electrocardiogram being recorded and information on the mounting state of the electrodes. To.

  FIG. 2 is a perspective view schematically showing an external appearance example of the electrocardiograph according to the present embodiment. The electrocardiograph has a substantially box-shaped housing, and has a form similar to a general notebook PC in which a display unit 70 is attached to the upper part so as to be openable and closable around one end. Here, connectors for attaching two electrode groups are provided one on each of the left and right sides of the casing, and identification display portions 71A and 71B corresponding to the respective electrode groups are also arranged on the left and right sides of the casing. . FIG. 2 shows an example in which the identification display portions 71A and 71B are arranged at the left and right end portions of the display portion 70. However, if the correspondence with the electrode group can be intuitively grasped, for example, a connector for attaching the electrode group It can be placed at any location, such as in the vicinity.

  In the example of FIG. 2, each of the identification display portions 71A and 71B has two illuminable areas such as two LEDs, for example. As will be described later, one of them indicates whether recording is in progress. One indicates whether or not the attachment of the electrode group is normal by the presence or absence of lighting and the lighting color.

Hereinafter, the operation of the electrocardiograph according to the present embodiment will be described using the flowchart shown in FIG.
Here, it is assumed that the detection of the electrocardiogram signals by the first and second electrocardiogram signal detection units 204 and 205 is started in a state where the power of the electrocardiograph body is turned on and the initialization process is completed. .

  In S101, the arithmetic control unit 10 as the control means receives signals (here, standard 12-lead each lead) supplied from the electrocardiogram signal detection units 204 and 205. In S103, the arithmetic control unit 10 displays the received waveform of each guide on the display unit 70 in real time. First, in the initial stage, the arithmetic control unit 10 displays each of the induced waveforms from the electrode electrocardiogram signal detection units 204 and 205 in an area having the same size.

  A display form of the display unit 70 in this state is schematically shown in FIG. In FIG. 4, the induced waveform for the subject A from the first electrocardiogram signal detector 204 is in the region 70A, and the induced waveform for the subject B from the second electrocardiogram signal detector 205 is shown. It is assumed that it is displayed in the area 70B. In FIG. 4A, the regions 70A and 70B have the same size. Further, both the identification display portions 71A and 71B are turned off.

  When outputting a heart sound during recording of an electrocardiogram, the microphones 22 and 23 are attached to the subject in addition to the electrode groups 24 and 25. The arithmetic control unit 10 also receives heart sound data from the first and second heart sound detection units 202 and 203.

  Next, in S105, the arithmetic control unit 10 serving as a determination unit determines whether each of the electrode groups 24 and 25 is correctly attached and each guidance has a quality suitable for recording (electrode displacement or noise). Detection of whether there is an effect. Detection can be performed based on the level of each induced waveform. The arithmetic control unit 10 continuously performs this detection operation in parallel with the subsequent operations. When the influence of the electrode displacement or noise is detected, the display of the identification display units 71A and 71B (for example, red lighting) Notification is made by displaying 70.

  The arithmetic control unit 10 as the control means does not detect the influence of electrode displacement or noise on any of the electrocardiograms from the electrode groups 24 and 25 (first and second electrocardiogram signal detection units 204 and 205), When it is detected that the state suitable for recording is detected, the display area of the electrocardiogram that is suitable for recording is expanded (S107). In this specification, if the number of induced waveforms to be displayed and the time interval to be displayed are not changed, the enlargement (reduction) of the display area is synonymous with the enlargement (reduction) display of each induction waveform. Note that the enlargement (reduction) of the display area includes the enlargement (reduction) of the waveform, the extension (reduction) of the time section in which the waveform is displayed, and combinations thereof. For example, when the display area is reduced, the waveform display time interval, which was 20 seconds until then, can be changed to 10 seconds. In addition, the arithmetic control unit 10 indicates that the guidance that is in a state suitable for recording is obtained without detecting the influence of electrode displacement or noise (for example, the display of the corresponding identification display unit 71 (for example, The user is notified by green lighting).

  The display form of the display unit 70 in this state is schematically shown in FIG. Here, with respect to the subject A, in FIG. 4, the influence of electrode displacement and noise is not detected, and it is determined that the state is suitable for recording, and thus an area 70 </ b> A for displaying the electrocardiogram of the subject A is displayed. The portion (the region 70B is reduced) is enlarged, and the portion indicating “no electrode displacement” of the identification display portion 71A is lit in green, for example.

  FIG. 5 is a diagram more specifically showing the display state corresponding to FIG. In this way, when the electrocardiograph determines that the quality of the induced waveform has reached a standard sufficient for recording, the display area of the induced waveform is automatically expanded, so that the user can perform each guidance at a more detailed level. It becomes easy to visually confirm the state of the waveform. In the example of FIG. 5, the warning display 701 is performed for the subject B because the influence of electrode displacement and noise is detected. In addition, when there is a lead that has been detected to be affected by electrode slippage or noise, if all of the leads are not displayed simultaneously, or if they cannot be displayed at the same time, the problem guide is displayed with priority. Can help solve the problem.

  Returning to FIG. 3, in the display state of FIG. 4B or 5, an enlarged display instruction of an electrocardiogram whose display area is reduced (in this case, the electrocardiogram of subject B) is input from the input / instruction unit 90. If this happens (S109, Y), the arithmetic processing unit 10 enlarges the display area of the instructed electrocardiogram (S111). As shown in FIG. 4A, the enlargement may be performed so that each subject has an equal size. As shown in FIG. 4B, the indicated electrocardiogram is displayed in the largest area. You may enlarge so that.

  In S113, the arithmetic control unit 10 advances the process to S115 if a recording start instruction is input from the input / instruction unit 90, and returns the process to S109 if not input. As described above, in S109 to S113, if there is an enlargement instruction for a specific electrocardiogram, a process for enlarging the display area of the electrocardiogram is continued until a recording instruction is input.

  When an input of a recording start instruction is detected in S113, the arithmetic control unit 10 starts recording an electrocardiogram displayed in an enlarged manner at the time when the recording start instruction is input in S115. If there is no difference in the size of the display area, or the enlarged electrocardiogram does not reach the recording quality (electrode displacement etc. are detected), the recording quality is achieved. Start recording ECG. The arithmetic control unit 10 also lights the corresponding identification display unit 71 so that the subject (electrode group) that has started recording can be known.

  The recording is at least one of printout in the recording unit 75 and data recording in the storage unit 80, and the induced waveform displayed on the display unit 70 is recorded. That is, display and recording are synchronized.

  When the recording is started, the arithmetic control unit 10 advances the process to S117, and changes the display mode for the induced waveform being recorded among the induced waveforms being displayed on the display unit 70. For example, as shown in FIG. 4C, the arithmetic control unit 10 reduces the display area 70 </ b> A of the induced waveform being recorded (enlarges the display area 70 </ b> B of the waiting patient's induced waveform). This is especially true when the recording time is short, such as in a mass screening, where it is unlikely that the electrode will be dislodged during the recording. It is more beneficial to do. As the recording time elapses, the display area of the induced waveform being recorded may be reduced gradually or stepwise (for example, the width of the screen display is narrowed). If electrode misalignment or the like is detected during recording, the user may be notified by any combination of the warning display 701 and the identification display unit 71A being turned off or red, the voice message from the voice generation unit 85, and the warning sound. it can.

  In the example of FIG. 4C, the fact that the induced waveform displayed in the display area 70A is recorded is indicated by the lighting of the identification display portion 71A. In addition, the fact that the induced waveform being displayed in the display area 70B has reached a quality sufficient for recording is indicated by the green lighting of the identification display portion 71B.

  When the heart sound is also acquired, the heart sound output from the sound generation unit 85 may be stopped for the induced waveform being recorded, and only the heart sound of the waiting subject may be output. Alternatively, only the heart sound corresponding to the induced waveform that is not displayed may be output.

  A heartbeat synchronized sound may be used instead of the heart sound. The heartbeat-synchronized sound is a synthesized sound that is synchronized with a characteristic point (for example, R wave) of a representative waveform (for example, II lead) in the acquired electrocardiogram waveform. When using heartbeat synchronized sound instead of heart sound, the sound quality and pitch of the subject may be different so that the heartbeat synchronized sound of the patient on standby and the heartbeat synchronized sound of the subject being recorded can be distinguished. Good.

  Recording continues until a predetermined time elapses, and when the recording ends (S119, Y), the arithmetic control unit 10 has the recording quality of the unrecorded electrocardiogram (detects electrode displacement or the like). Enlarge the display area of things that are not. In S117, if the display area has already been enlarged, this step need not be executed.

  When the electrocardiogram recording of the subject A is completed, the start instruction of the electrocardiogram recording of the subject B and the attachment of the electrode group 24 (and the heart sound microphone 22 as necessary) from the subject A to the next subject It can be performed. Thereafter, the recording is advanced using the electrode groups 24 and 25 sequentially.

Thus, according to the present embodiment, the electrocardiogram consisting induction signal group, in the electrocardiograph which can simultaneously from multiple subjects, among the plurality of induction signal group input from the plurality of electrode groups Since the display of the guidance signal group for the subject on standby is larger than the guidance signal group being recorded, it is possible to easily distinguish between the guidance waveform being recorded and the guidance waveform on standby. In addition, it is possible to easily determine which electrode group (subject) is recording without confirming the waveform display by the display by the identification display unit.

  In addition, in order to expand the display of the guidance signal group for the waiting subject than the guidance signal group being recorded, it is more detailed whether there is a problem such as electrode displacement for the waiting subject. You can prepare for recording after confirming. Also by this, the efficiency of electrocardiogram recording for a large number of subjects can be improved.

  Furthermore, if the induction signal group determined to have a quality sufficient for recording is automatically enlarged and displayed before the recording is started, the user can confirm the display of each induction signal group. Thus, it is not necessary to determine which induction signal group should be recorded, and a recording instruction can be issued after confirming a more detailed induction waveform for the induction signal group determined to have sufficient quality by the apparatus. Therefore, it is possible to record an electrocardiogram efficiently and with high quality.

(Other embodiments)
In addition, about the change of a display form in S117 of the above-mentioned embodiment, it is also possible to use another method. FIGS. 6A to 6C show another example relating to a change in display mode during recording.

  In the example of FIG. 4C, the induced waveform display during recording is displayed in a reduced size without changing the number of inductions to be displayed (standard 12 inductions), but the number of inductions to be displayed is reduced. Thus, the reduction rate of the induction waveform can be suppressed. FIG. 6A shows an example in which six leads I, II, III, aVR, aVL, and aVF are displayed instead of the standard 12 leads.

  On the other hand, in the example of FIG. 6B, the display form in the case where the minimum information should be displayed for the induced waveform being recorded is shown. Here, an example is shown in which only one specific guidance (for example, II guidance) is displayed for the guidance waveform being recorded, and the waiting guidance waveform is displayed in the other areas.

  Further, as shown in FIG. 6 (c), the induced waveform for which recording has started is not displayed on the display unit, and is only displayed on the identification display unit 71 (whether it is turned on or turned on in a specific color, etc.). You may make it perform. When not displaying the induced waveform for which recording has started, the display area of the waiting induced waveform does not necessarily have to be enlarged.

  In addition, you may change the external appearance not only the change of the magnitude | size (display magnification) of a display area. For example, the display form may be changed so that the display of the waiting induction waveform is more conspicuous than the display of the induction waveform being recorded. Specifically, the background color of the display area of the induced waveform being recorded (70A) is set to a color in which the display waveform is inconspicuous (for example, white or a color similar to the display waveform), and the display area of the standby induced waveform is displayed (70B). ) Background color (background pattern) may be changed to a pattern representing a recording paper grid. Of course, the display color of the waveform itself may be changed, the luminance of the waveform display may be reduced, or a combination with a change in the size of the display area may be used.

  Note that the operation control of the electrocardiograph including the above-described display control of the induced waveform can be realized by software, and a program for causing the computer to execute the above-described operation, or such a program is recorded. The computer readable recording medium also constitutes the present invention.

Claims (13)

An electrocardiograph capable of simultaneously obtaining an electrocardiogram comprising a group of induction signals from a plurality of subjects,
Recording means for recording one of a plurality of electrocardiograms being simultaneously acquired from the plurality of subjects;
Control means for controlling the display of the electrocardiogram in the display device,
When the recording unit starts recording any one of the plurality of electrocardiograms, the control unit makes the size of the display region of the recorded electrocardiogram smaller than the size of the non-recorded electrocardiogram display region. or, either do not perform display of an electrocardiogram, which is the recording, electrocardiograph, characterized in that to perform the hand of.   2. The electrocardiograph according to claim 1, wherein when the size of the recorded electrocardiogram display area is reduced, the control means reduces the number of induction signals displayed in the display area.   2. The electrocardiograph according to claim 1, wherein when the size of the display area of the electrocardiogram is reduced, the control means shortens the time interval of the induction signal displayed in the display area. An electrocardiograph capable of simultaneously obtaining an electrocardiogram comprising a group of induction signals from a plurality of subjects,
Recording means for recording one of a plurality of electrocardiograms being simultaneously acquired from the plurality of subjects;
Control means for controlling the display of the electrocardiogram in the display device,
When the recording means starts recording any one of the plurality of electrocardiograms, the control means provides a display area background so that the recorded electrocardiogram display is less noticeable than the unrecorded electrocardiogram display. And an electrocardiograph, wherein at least one of display forms of the electrocardiogram is changed.   The control means further includes a heart sound acquired from a subject whose electrocardiogram is recorded by the recording means or a heartbeat synchronization sound of the electrocardiogram recorded by the recording means, and a subject on which no electrocardiogram is recorded by the recording means. The electrocardiograph according to any one of claims 1 to 4, wherein an output of a heart sound acquired from an examiner or a heartbeat synchronization sound of an electrocardiogram not recorded by the recording unit is made different.   The control means does not output a heart sound acquired from a subject whose electrocardiogram is recorded by the recording means or a heartbeat synchronization sound of the electrocardiogram recorded by the recording means, and an electrocardiogram is recorded by the recording means. 6. The electrocardiograph according to claim 5, wherein a heart sound acquired from a non-examined subject or an electrocardiogram heartbeat synchronized sound not recorded by the recording means is output.   The said control means outputs so that the heartbeat synchronizing sound of the electrocardiogram recorded by the said recording means and the heartbeat synchronizing sound of the electrocardiogram which is not recorded by the said recording means can be distinguished. Electrocardiograph. A determination means for determining whether the induction signal group has a quality sufficient for recording;
The control means, before the recording by the recording means is started, out of the plurality of electrocardiograms, an electrocardiogram display area consisting of a group of induction signals determined by the determination means to have a quality sufficient for recording, 8. The electrocardiogram display area comprising the induction signal group that is not determined by the determination means when having a quality sufficient for recording is automatically made larger than the display area of the electrocardiogram. The described electrocardiograph.   When none of the plurality of induction signal groups constituting the plurality of electrocardiograms has been determined by the determination unit to have a quality sufficient for recording, the control unit sets each of the plurality of electrocardiograms to an equal magnitude. The electrocardiograph according to claim 8, wherein the electrocardiograph is displayed in a display area.   The electrocardiograph according to claim 8 or 9, further comprising display means for displaying a determination result by the determination means by the presence or absence of lighting or a lighting color. Control of an electrocardiograph having recording means capable of simultaneously acquiring an electrocardiogram comprising a group of induction signals from a plurality of subjects and recording one of the plurality of electrocardiograms being simultaneously acquired from the plurality of subjects. A method,
When recording of any of the plurality of electrocardiograms is started, the size of the recorded electrocardiogram display area is made smaller than the size of the non-recorded electrocardiogram display area or the recorded electrocardiogram is recorded. the method of electrocardiograph, characterized in that it comprises a control step of executing or not to perform a display of an electrocardiogram, the one-way. ECG consisting induction signal group are simultaneously obtainable from a plurality of subjects, the electrocardiograph having a recording means for recording one of a plurality of electrocardiogram in simultaneously acquired from the plurality of subjects A control method,
When recording of any of the plurality of electrocardiograms is started, the background of the display area and the display form of the electrocardiogram are displayed so that the display of the recorded electrocardiogram is less noticeable than the display of the non-recorded electrocardiogram An electrocardiograph control method comprising a control step of changing at least one. ECG consisting induction signal group are simultaneously obtainable from a plurality of subjects, the electrocardiograph having a recording means for recording one of a plurality of electrocardiogram in simultaneously acquired from the plurality of the subject A program for causing a computer having the computer to execute the steps of the electrocardiograph control method according to claim 11 or 12.