JPH0263008B2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to an electrocardiogram information recording method for recording data recorded over a long period of time by Holter electrocardiography as a compressed waveform, and recording the analysis results in temporal correspondence with the compressed waveform. Regarding equipment.

Conventional technology Conventionally, in order to analyze and process long-term recorded signals, (1) ECG signal abnormalities (AT deviation,
R-R irregularity) is automatically detected and recorded on tape,
(1971), which automatically analyzes long-term recording tapes and detects ST deviation,
A method for detecting R-R irregularities and QRS width abnormalities and automatically recording the electrocardiogram at that time (1974), (3) Trends in instantaneous heartbeat, ST deviation, and premature supraventricular contractions and premature ventricular contractions. bar graph every minute,
There was a method (1970) that recorded sample waveforms for one heartbeat with ST deviation priority every 10 minutes and compressed records of premature ventricular contractions along with clock signals on a thermal recorder.

However, since there is currently no fully effective automatic analysis program for electrocardiogram signals used in daily life, long-term analysis by electrocardiogram experts has been unavoidable.

OBJECTS OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to provide data necessary for judgment by experts who have sufficient experience in Holter electrocardiograms in a format that is easy to inspect.

The present invention records long-term electrocardiogram waveforms and analysis results with the required relationship that allows for easy temporal correlation with each other, and enables quick extraction and enlarged recording of specific problem areas, as well as for judgment purposes. An object of the present invention is to provide an electrocardiogram information recording method and apparatus that reduce the time required for the electrocardiogram information recording.

The following configuration is provided as a means for achieving the above objective.

That is, a long-term electrocardiogram waveform is recorded in a first recording area of the recording paper, and a second recording area adjacent to the first area is an analysis result of the long-term electrocardiogram waveform recorded in the first recording area. An electrocardiogram information recording device for recording a compressed electrocardiogram waveform in a first area of a recording paper, comprising: an electrocardiogram compressed waveform recording means for dividing and recording the compressed electrocardiogram waveform as a plurality of lines of compressed waveform;
The recording line interval of the compressed waveform of the first area on the time axis that is orthogonal to the recording time axis of the compressed recording waveform recording line from the position of the recording start line of the compressed recording waveform of the first area in the area of . and analysis result recording means for recording the analysis result on a time scale whose distance corresponds to the time scale of one line of the compressed waveform.

Further, the electrocardiogram information recording device records a compressed waveform of a long-term electrocardiogram waveform and an analysis result of the compressed waveform on the same recording paper, and the electrocardiogram information recording device includes a storage means for storing recorded information to be recorded on the recording paper, and a storage means for storing the recorded information to be recorded on the recording paper; an input means for inputting the information together with the information; a compressed waveform generating means for generating a compressed recording waveform by compressing the electrocardiogram information inputted by the input means and storing the compressed recording waveform in a compressed recording waveform storage area of the storage means as a plurality of rows of compressed recording waveforms;
analysis information generation means for analyzing input electrocardiogram information from the input means to generate recording analysis information on recording paper and storing it in a recording analysis information storage area of the storage means;
The analysis information generating means includes a recording means for recording and outputting the stored information in the compressed waveform storage area and the stored information in the recorded analysis information storage area stored in the storage means on an adjacent area of the recording paper, and the analysis information generating means The recording is generated on a time scale that is perpendicular to the recording time axis in the row direction of the compressed recording waveform during recording, and on a time scale in which the recording line interval of the compressed recording waveform on the time axis is the time scale of one line of the compressed recording waveform. A configuration is provided for expanding the analysis information into a recorded analysis information storage area of the storage means.

In the above configuration, by recording the analysis results of the long-term electrocardiogram waveform together with the compressed waveform of the electrocardiogram waveform in a temporal association with each other at a recording position with few restrictions on the expression method, the analysis results and the electrocardiogram waveform can be recorded. It is possible to easily make a correspondence, and it is possible to easily make a judgment regarding an electrocardiogram.

Embodiment A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a block diagram of one embodiment of the present invention. This block diagram mainly shows the control section and does not show the part for recording the original electrocardiogram waveform on the magnetic recording device. These can be commonly used, and are not necessarily the features of the present invention.

In the figure, 1 is the operation and display section of the key switch and display provided on the panel.
Combined with CPU unit 2. Reference numeral 3 denotes an input unit which takes as input data the output of a magnetic tape reproducing device on which electrocardiogram waveforms have been recorded for a long period of time, and adds a time code and the like. However, operations such as time editing are performed together with the CPU unit 2 under software control. As shown in FIG. 2A, the vertical writing unit 4 is a unit for vertically writing the time-compressed electrocardiogram waveform into sections, for example, every minute, and receives the ECG waveform from the input section 3 and outputs data for vertical writing. Edit the waveform and send it to the ECG data memory 5. This vertical writing unit 4 is controlled by the CPU unit 2. Unit 6 receives input from input section 3.
Analyzes and edits ECG waveforms to generate instantaneous HR, ST level trends, SVE data, and more.
This is the detection and editing department for obtaining VE data, etc. The operation of the detection editing section 6 is, for example, the 19th Japan ME Society Conference "Development of Holter long-term electrocardiogram/automatic analysis device"
Since it is well known as is clear from the above, the explanation will be omitted.

The CPU unit 2 reads the time code and the like from the detection and editing section 6 and the input section 3, converts it into recorded information in the thermal recording section, and stores the edited data in the edited data memory 7. At the output of the memory read control unit 8 controlled by the CPU unit 2, the contents of the edit data memory 7 and the contents of the ECG data memory 5 are transferred to an interface or driver circuit (not shown) in the thermal recording section 10. Supplied via.
In addition, the memory read control unit 8
The thermal recording section 10 is supplied with clocks, strobe signals, etc. for control.

In addition, gate 9 is used for editing data memory 7 and ECG.
OR to obtain logical sum output with data memory 5
It is a gate.

Next, the operation of the apparatus according to the present invention will be described together with flowcharts showing the operation of the CPU unit 2 shown in FIGS. 2 and 4 showing examples of recording by the thermal recording section 10.

The CPU unit 2 first activates the input section 3 by operation and instructions from the display section 1, etc. (step 40),
Next, the vertical writing unit 4 and the detection/editing section 6 are activated (step 41).

As a result, the ECG waveform is sent from the input section 3 to the vertical writing unit 4 and the detection/editing section 6.

When editing of one recording unit is completed (step 42-Y)
The CPU unit 2 receives the edited data from the detection and editing section 6 (step 43), creates a summary report (step 44), converts the edited data into a format to be recorded in the thermal recording section 10, and stores it in the edited data memory 7. Then, the thermal recording section 10 is operated to record the contents of the ECG data memory 5 and the edited data memory 7.

A in FIG. 2 is an electrocardiogram waveform recorded vertically in sections of 1 minute, and edited into sections of 1 minute by the action of the vertical writing unit 4 as described above.
By storing the data in the ECG data memory 5, it is recorded as shown in FIG.

B in FIG. 2 shows the time and heart rate, and the time code output from the input section 3 is used to record the time every 5 minutes and the average heart rate for each 5 minutes in numbers. In addition, C and D are examples of ST level trend and instantaneous heart rate trend recording from the detection and editing department 6, and the ST level trend is -
The trend of instantaneous heart rate is recorded along with the heart rate scale.

Note that the sensitivity of the compressed electrocardiogram waveform of one line per minute is about 1/3 that of normal electrocardiogram recording, and the recording speed is compressed to about 1/10 of the standard recording speed.

In addition, the number of supraventricular and ventricular premature contractions and event markers every 5 minutes are recorded, as well as the total heart rate every hour as a summary report at the end.
Number of premature supraventricular contractions, number of premature ventricular contractions, average heart rate,
Maximum heart rate, minimum heart rate, minimum ST deviation, maximum ST
In addition to deviations, record other necessary items.

In the apparatus according to the present invention, electrocardiogram data recorded on a magnetic tape or the like can be reproduced in the thermal recording section at a speed 60 times faster than electrocardiogram signal recording. Moreover, since each process is automatically performed once it is set, there is no need for monitoring. Furthermore, data processed in this way can be inspected all at once by experts. At this time, check the problem area in 1 minute increments, and
By specifying in units of 10 seconds, the electrocardiogram waveform of the problem area over this time range can be automatically recorded at variable speed and enlarged. An example of this enlarged recording is shown in FIG.

As described above, according to this embodiment, the total electrocardiogram waveform recorded with a portable or stationary electrocardiogram recording device, the trendgram of heart rate, ST level, etc., and supraventricular,
Waveform analysis results such as the number of premature ventricular contractions and average HR can be recorded in corresponding positional relationships over time. Furthermore, in order to make it easier to visually inspect the analysis results, analog and digital displays are performed in parallel. In the example of this application, the print width of the analysis result is 5 cm, and the ST deviation and
In addition to displaying heart rate trends etc. in analog form,
The number of premature contractions within a unit time, average HR, time, etc. are digitally displayed, and these are superimposed and recorded.

Heart rate trends, which display changes in heart rate over time, are available as information on long-term electrocardiogram analysis results, but conventionally, the average trend, which is a graph of heart rate within a unit of time, and the reciprocal of R-R time are mainly displayed. The instantaneous heart rate trend has been used. Both methods have advantages and disadvantages, but this application provides a method that takes advantage of the advantages of both. That is, the reciprocal of the R-R time is displayed in bits on the trend graph of the heart rate per minute to clarify the relationship between the basic rhythm and extrasystole. At this time, for example, for premature contractions in which the instantaneous R-R time is 150 or more in terms of HR and it is necessary to urge the examiner to make a decision, increasing the size of the dot will make it easier to see and call for caution. It's easy to do.

The above embodiments have been described on the premise that a multi-thermal head is used as the recording means. By the way, currently available multi-thermal heads have dot dimensions of 0.1 x 0.2 mm and dot spacing of 8 dots/1 mm.

Using a multi-thermal head with these specifications, for example, if the waveform per minute is displayed in a length of 150 mm and recorded compressed to 1/10 of standard recording, the head's resolution of 8 dots/mm will reduce the actual frequency. Since the band is 20Hz, it becomes impossible to record the QRS part of the electrocardiogram waveform, which normally exists in the 30Hz to 40Hz frequency band.

In addition, when recording the heart rate trendgram at 5 mm per minute as in the embodiment of this application, 0.1 x 0.2
Dot dimensions on the order of mm limit the recording resolution;
For example, a resolution of only about 25 HR can be obtained.
In this embodiment, in order to solve this problem, the peak value of a waveform such as QRS is held, and the waveform is recorded in high quality regardless of the resolution of the head. Also
When there is an irregular fluctuation in HR of 25 or more, if you hold and record all the heartbeat cycle signals that occur during the repeated recording period of the head, you can use the high resolution type without using a special high resolution thermal head. Recording equivalent to that of

As explained above, according to the present embodiment, analysis results can be achieved by recording the compressed waveform of a long-term electrocardiogram waveform and the analysis results of the electrocardiogram waveform in temporal correspondence with each other at recording positions with few restrictions on the expression method. It is possible to easily associate the results with the electrocardiogram waveform, and it is possible to easily make judgments regarding the electrocardiogram.

In addition, high-speed playback is possible without compromising the quality of the electrocardiogram waveform used for diagnosis, and multiple pieces of analysis data are displayed in the required relationship without any restrictions, making it possible to obtain accurate diagnostic results in a short time. Can be done.

Moreover, it has a particularly remarkable effect when the electrocardiogram waveform is a compressed small waveform, and even in such a case, all compressed waveforms can be displayed and analysis results can be easily associated with each other in terms of time. Specific problem areas can be quickly extracted using only the recorded results according to the present invention, and the time required for determination is shortened.

Effects of the Invention As explained above, according to the present invention, compressed waveforms of long-term electrocardiogram waveforms can be recorded without thinning, and
The analysis results of the electrocardiogram waveform can be recorded in a temporal relationship with each other on a recording device with few restrictions on the method of expression, and the analysis results and electrocardiogram waveforms can be easily correlated to facilitate judgment regarding the electrocardiogram. It can be achieved.

In addition, even when the electrocardiogram waveform is a small compressed waveform, it is possible to display all the compressed waveforms and record the analysis results in the required relationship that can be easily correlated with each other in time.
A specific problem location can be quickly extracted using only the recorded results according to the present invention, and the time required for determination is shortened.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG.
FIG. A is a diagram showing an electrocardiogram recording waveform according to an embodiment of the present invention, FIG. 3 is a diagram showing an enlarged recording example of a problematic part of the electrocardiogram, and FIG. 4 is a flowchart showing the operation of the CPU unit. Explanation of symbols, 1... Operation and display section, 2...
CPU unit, 3... Input section, 4... Vertical writing unit, 5... ECG data memory, 6... Detection editing section, 7... Edit data memory, 8... Memory read control unit, 9... Gate, 10... thermal recording section.

Claims (1)

[Scope of Claims] 1. Recording an electrocardiogram waveform for a long time in a first recording area of recording paper, and recording the long-term electrocardiogram waveform recorded in the first recording area in a second recording area adjacent to the first area. An electrocardiogram information recording method for recording an analysis result of a temporal electrocardiogram waveform, the method comprising: dividing and recording a compressed recording waveform of an electrocardiogram waveform as a plurality of lines of compressed waveforms in a first area of the recording paper; recording the compressed waveform in the first area on a time axis perpendicular to the recording time axis of the compressed recording waveform recording line and on the time axis from the position of the recording start line of the compressed recording waveform in the first area; An electrocardiogram information recording method, characterized in that the analysis result is recorded on a time scale in which the line interval distance corresponds to the time scale of one line of the compressed waveform. 2 The analysis results recorded in the second area are at least the ST level trendgram recording line and instantaneous heartbeat trendgram recording line of the compressed recorded waveform of the first area that is continuously recorded in analog form, and the time axis direction. 2. The electrocardiogram information recording method according to claim 1, wherein the measurement time recorded as a digital value on a predetermined time scale and the average heart rate display within the predetermined time are recorded in parallel. 3. The electrocardiogram information recording method according to claim 2, characterized in that the size of the recording dots of the instantaneous heartbeat trendgram is changed depending on the number of premature contractions. 4. An electrocardiogram information recording device that records a compressed waveform of a long-term electrocardiogram waveform and an analysis result of the compressed waveform on the same recording paper, comprising a storage means for storing the recorded information recorded on the recording paper, and a storage means for storing the recorded information recorded on the recording paper, and a storage means for storing the electrocardiogram information over time. an input means for inputting information together with the information; and a compressed waveform generation means for generating a compressed recording waveform by compressing the electrocardiogram information inputted by the input means and storing it in a compressed recording waveform storage area of the storage means as a compressed recording waveform of a plurality of rows. , analysis information generation means for analyzing input electrocardiogram information from the input means to generate recording analysis information on recording paper and storing it in a recording analysis information storage area of the storage means; and compression stored in the storage means. recording means for recording and outputting the stored information in the waveform storage area and the stored information in the recorded analysis information storage area on an adjacent area of recording paper; The recording analysis is generated on a time scale that is orthogonal to the recording time axis in the row direction of the compressed recording waveform, and the recording line interval of the compressed waveform on the time axis is the time scale of one line of the compressed recording waveform. An electrocardiogram information recording device characterized in that information is developed in a recording analysis information storage area of the storage means. 5 The record analysis information generated by the analysis information generation means includes ST level trend grams and instantaneous heart rate trend grams that are continuously recorded in analog form on recording paper, and measurement time information and digital numerical values that are recorded at predetermined intervals. 5. The electrocardiogram information recording device according to claim 4, wherein the average heart rate within the predetermined time is displayed.