JPH053862A - Automatic electrocardiogram analyzing device - Google Patents

Abstract

PURPOSE:To obtain the results of analysis with high accuracy even if a person to be examined is an infant, etc., and stable mounting of a chest 6 electrode is not possible by bodily movements, etc., by successively moving one piece of the chest electrode to the respective positions of standard 12 induction to input an electrocardiogram and subjecting the resulted electrocardiograms to analysis processing. CONSTITUTION:The electrode is constituted of 4 pieces of the electrodes for holding the limb and one piece of the electrode to be attracted to the chest. The electrocardiogram signals induced by the respective electrodes are amplified by amplifiers 3A to 3c, are changed over by a multiplexer 4 and are converted to time series digital signals by an A/D converter 5; thereafter, the limb 6 induction and chest 1 induction are computed in a waveform computing section 6. The waveforms of the limb 6 induction and chest 1 induction are displayed on a display section 11 in an operating section 8. The waveforms are stored in a memory section 7 at the point of the time when the waveforms stabilize. The chest electrode is successively mounted to the respective positions V1 to V6 at this time and finally, the electrocardiogram waveforms of the standard 12 induction are stored in the memory section 7. Further, the characteristics of the standard 12 induction electrocardiograms are recognized and classified in an analyzing section 9 and the results of the analysis, etc., are edited and are recorded in a recording section 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic electrocardiogram analyzer.

[0002]

2. Description of the Related Art In a conventional electrocardiogram automatic analysis device,
Electrodes and six chest electrodes are attached to a subject, an electrocardiogram signal is induced from each electrode and amplified to a constant amplitude by an amplifier inside the apparatus, and then a standard 12-lead electrocardiogram is synthesized. By instructing to start recording from the operation panel of the device, a standard 12-lead ECG waveform for a certain period of time is recorded, and
The data is converted into time-based digital data by the A / D converter inside the device and is stored in the memory inside the device. Generally, a standard 12-lead electrocardiogram waveform of about 1 to 5 seconds and a second lead and a fourth lead electrocardiogram waveform of 10 to 20 seconds for arrhythmia detection are recorded and held inside the apparatus. Retained standard 1
Analysis processing is performed on the 2-lead waveform and the arrhythmia detection waveform, and various measurement values (number of heart stays, interval between P wave and R wave, etc.)
Also, the diagnostic result and the like are requested and recorded. The potential differences between the left hand-right hand, the left foot-right hand, and the left foot-left hand have been conventionally represented by Roman numerals 1, 2, and 3, respectively, but here, they will be referred to as first, second, and third, respectively. .

[0003]

In the conventional automatic ECG analyzer, the subject wears 4 limbs and 6 electrodes on the limbs, and rests in the supine position while the ECG is being input (usually 10 to 20 m). It is necessary to prevent mixing of electromyograms and shaking of the baseline as much as possible. As a result, a high-quality standard 12-lead ECG waveform can be recorded, and a highly accurate analysis coin can be obtained. However, in the case of an infant, since it is not possible to keep a rest at all times during input, in many cases, one of the six chest electrodes is detached from the mounting portion due to body movement, and the examination cannot be performed in many cases. Further, even if the input of the electrocardiogram can be completed, the quality of the obtained electrocardiogram waveform is often extremely low, and there is a problem that the accuracy of analysis is reduced and a false diagnosis is caused.

Further, although it is possible to surely record one lead of the chest by an ordinary electrocardiograph to obtain an electrocardiogram waveform with a certain degree of quality, it is not possible to obtain a standard 12-lead electrocardiogram analysis result from the obtained waveform. There was a problem.

[0005]

The electrocardiogram automatic analyzing apparatus of the present invention inputs an electrocardiogram signal from the limb electrodes attached to both hands and feet and outputs a standard 12-lead limb 6-lead waveform (first, second, second).
(3rd, aVR, aVL, aVF) and one chest electrode mounting position is sequentially moved from the standard 12-lead position V1 to the position of V6, and an electrocardiogram signal is input to the standard 12-lead chest 6 lead. Waveform (V1, V2, V3, V4, V5, V
6), a means for obtaining an analysis result of the obtained standard 12-lead waveform, and a means for editing and recording the obtained standard 12-lead waveform and the analysis result.

[0006]

The present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention,
FIG. 2 is an external view.

Electrode 1 is a scissor electrode for four limbs and 1
The scissors electrode is attached to both hands and feet of the subject, and the suction electrode is attached to any position from V1 to V6 on the chest. The electrocardiogram signal induced by the electrode 1 is passed through the induction code 2 and the amplifier 3A.
Is input to ~ 3C. The amplifiers 3A to 3C are three differential amplifiers (right hand-left foot) and (right hand-left foot), respectively.
The signal of (chest-left foot) is amplified. The amplified signals are designated as CH1, CH2, and CH3, respectively. The signal amplified is CH1, CH2, CH3 by the multiplexer 4.
The signals are input to the A / D converter 5 while being switched in the order of and are converted into time-series digital signals. The waveform calculation unit 6 calculates the limb 6 lead and the chest 1 lead from the digitized electrocardiographic signals of CH1, CH2, and CH3.

The arithmetic expression is shown below.

First lead = CH1-CH2 Second lead = CH1 Third lead = CH2 aVR lead = (CH2 / 2) -CH1 aVL lead = (CH1 / 2) -CH2 aVF lead = (CH1 + CH2) / 2 Chest lead = CH3 + (CH1 + CH2) / 3 The waveforms of the limb 6 lead and the chest 1 lead calculated by the waveform calculator 6 are displayed in real time on the display unit 11 according to an instruction from the operation unit 8. The operator observes the waveform displayed on the display unit 11, gives an instruction from the operation unit 8 when the waveform becomes stable, and the waveforms of the limb 6 lead and the chest 1 lead displayed on the display unit at that time are displayed. It is stored in the storage unit 7. The length of the displayed and stored electrocardiogram was 5 seconds in this example.

The chest electrode is first attached to the position of V1, and the waveform is observed and stored by the procedure described above. The chest electrodes are sequentially mounted from V1 to V6, and by repeating the above procedure at each mounting position,
Finally, the standard 12-lead electrocardiogram waveform is stored in the storage unit 7. In the analysis unit 9, the P wave of the standard 12-lead electrocardiogram obtained,
The division points (start point and end point) of each spike wave such as the QRS complex and the T wave are recognized, the measured values (time width and amplitude) of each spike wave are obtained, and classified into diagnosis names. In the present embodiment, classification by the Minnesota code was performed.

The obtained standard 12-lead electrocardiogram waveform and the analysis result are edited for easy viewing and output to the recording unit 10.

[0012]

As described above, according to the present invention, one chest electrode is used and the mounting position is standard 12-lead V1 to V6.
Since it is possible to sequentially move to the position of, input the electrocardiogram, and analyze the standard 12-lead electrocardiogram obtained in this way, the subject cannot be rested during the examination, especially for infants and children. Even when the chest 6 electrode cannot be stably attached due to movement or the like, it is possible to record a high-quality electrocardiographic waveform and obtain an analysis result with high accuracy.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is an external view of this embodiment.

[Explanation of symbols]

 1 electrode 2 dielectric code 3 amplifier 4 multiplexer 5 storage unit 6 waveform calculation unit 7 storage unit 8 operation unit 9 analysis unit 10 recording unit 11 display unit

Claims (1)

Claims: 1. A standard 12-lead 6-limb 6-limb waveform by inputting an electrocardiogram signal from the limb electrodes attached to both hands / legs
Second, third, aVR, aVL, aVF) means,
The mounting position of one chest electrode is from standard 12 lead V1 to V
Move to position 6 and input the electrocardiogram signal.
2-lead chest 6-lead waveform (V1, V2, V3, V4, V
5, V6), means for obtaining an analysis result of the obtained standard 12-lead waveform, and means for editing and recording the obtained standard 12-lead waveform and the analysis result. ECG automatic analyzer.