JP6077343B2 - ECG data processing apparatus and control method thereof - Google Patents

ECG data processing apparatus and control method thereof Download PDF

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JP6077343B2
JP6077343B2 JP2013047063A JP2013047063A JP6077343B2 JP 6077343 B2 JP6077343 B2 JP 6077343B2 JP 2013047063 A JP2013047063 A JP 2013047063A JP 2013047063 A JP2013047063 A JP 2013047063A JP 6077343 B2 JP6077343 B2 JP 6077343B2
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vertex
wave
electrocardiogram
detecting
data processing
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JP2014171677A (en
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奈津子 神馬
奈津子 神馬
達哉 米山
達哉 米山
剛 山内
剛 山内
睦雄 金子
睦雄 金子
匠 澤田
匠 澤田
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フクダ電子株式会社
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Description

  The present invention relates to an electrocardiogram data processing apparatus and a control method thereof.

  Conventionally, an electrocardiogram has been widely used as a diagnostic index for heart disease. The electrocardiogram is a signal waveform obtained by detecting the electrical activity of the heart on the body surface, and various information relating to the activity of the heart can be obtained by analyzing the electrocardiogram.

  Conventionally, an electrocardiogram is recorded on paper, and analysis is performed exclusively by a doctor observing the waveform. However, with the development of digital electrocardiographs that record ECG data as data, it has become possible to automatically analyze ECGs using a computer, and various parameters obtained from ECGs have been studied (for example, patent documents) 1).

JP 2006-116207 A

  One of the ECG waveforms is a J wave. The J wave is a waveform mainly found at the QRS terminal part of the lower wall guide or the side wall guide. Up to now, the J wave has been regarded as an electrocardiogram in the normal range, but in recent years, an association with sudden ventricular fibrillation has been reported, and interest in the J wave has increased.

  However, at present, a technology for automatically detecting the J wave has not been developed, and a doctor has only confirmed the notch-shaped J wave by visually observing the waveform.

  Therefore, an object of the present invention is to provide an electrocardiogram data processing apparatus capable of automatically detecting a notch-shaped J wave.

  According to one aspect of the present invention, first detection means for detecting a first vertex RT that is an apex of an R wave from an input electrocardiogram waveform, and a J point that is the end of a QRS wave is detected from the electrocardiogram waveform. A second detection means; a third detection means for detecting a second vertex JT which is a vertex between the first vertex RT and the J point; the first vertex RT and the second vertex; A fourth detecting means for detecting a minimum value JB between the second vertex JT and a determining means for judging that a J wave is present when the amplitude value Ja of the second vertex JT is equal to or greater than a predetermined threshold value. An electrocardiogram data processing device is provided.

  According to the present invention, an electrocardiogram data processing apparatus capable of automatically detecting a notch-shaped J wave is provided.

The block diagram which shows the hardware constitutions of the electrocardiogram data processing apparatus in embodiment. The figure which shows the example of J wave. The flowchart which shows the example of the J wave automatic detection process in embodiment. The figure explaining the parameter which concerns on the J wave automatic detection process in embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited to the following embodiment, It shows only the specific example advantageous for implementation of this invention. Moreover, not all combinations of features described in the following embodiments are indispensable for solving the problems of the present invention.

  FIG. 1 is a block diagram illustrating a hardware configuration example of an electrocardiogram data processing apparatus according to the present embodiment. Here, the electrocardiogram data processing device can be realized in the form of a so-called electrocardiograph or electrocardiogram analysis device.

  As shown in the figure, the electrocardiogram data processing apparatus 1 includes the following configurations including a CPU 101 that controls the entire apparatus, a ROM 102 that stores a boot program and BIOS, and a RAM 103 that functions as a main storage device.

  The HDD 104 is a hard disk device, in which a control program for executing the J wave automatic detection processing according to the present invention and electrocardiogram data to be described later are stored. However, the control program may be stored in the ROM 102. Reading and writing data to and from the HDD 104 is performed via the HDD controller 104a.

  Reference numeral 105 denotes an operation panel. Reference numeral 106 denotes a liquid crystal display (LCD) constituting a display unit, and a touch panel 107 is disposed on the LCD 106. Image display on the LCD 106 is performed via the LCD controller 106a, and control including detection of an operation on the touch panel 107 is performed via the touch panel controller 107a. Therefore, the user can input various instructions using the operation panel 105 or the touch panel 107.

  A thermal printer 108 prints out an electrocardiogram waveform, an analysis report, and the like on a built-in printing paper. The thermal printer 108 is controlled via the printer controller 108a.

  Reference numeral 109 denotes a memory card slot that detachably accommodates the memory card 109a. When the memory card 109a is connected to the memory card slot 109, the electrocardiogram data, the finding data obtained by the analysis, etc. can be stored in the memory card 109a.

  In addition, to the electrocardiogram data processing apparatus 1, for example, a plurality of electrodes 111 to be mounted on the chest and limbs of a subject to perform standard 12-lead measurement are connected via a lead interface (I / F) 110. Is done. The induction I / F 110 includes an A / D converter that converts an electrical signal input from the electrode group 111 into digital data.

  The electrocardiogram data processing apparatus 1 in the present embodiment is generally configured as described above.

  As described above, in recent years, interest in the J wave has increased. There have been reports that J waves are frequently observed from electrocardiograms of patients with sudden ventricular fibrillation. FIG. 2 shows an example of a 12-lead electrocardiogram in which a J wave is observed. In FIG. 2, notch-shaped J waves are observed in the I, II, V5, and V6 leads, as indicated by arrows A1, A2, A3, and A4, respectively. The present embodiment provides an automatic detection algorithm for such a notch-shaped J wave.

  FIG. 3 is a flowchart showing the J wave automatic detection processing in the present embodiment. FIG. 4 is a diagram for explaining parameters relating to the J-wave automatic detection processing in the present embodiment. A control program corresponding to the flowchart of FIG. 3 is stored in, for example, the HDD 104, loaded into the RAM 103 after the electrocardiogram data processing apparatus 1 is started, and executed by the CPU 101.

  First, in step S301, ECG data is input. Specifically, first, an electrical signal from the electrode 111 attached to the subject is acquired as electrocardiogram data via the lead I / F 110. The acquired electrocardiogram data is buffered in the RAM 103, for example. Here, for example, I guidance is selected as the initial processing target guidance. In the embodiment, a dominant waveform can be used as an electrocardiogram waveform to be processed. The dominant waveform is, for example, a waveform typically cut out as a waveform that appears most frequently in order to grasp a normal waveform. Or it is good also considering the addition average waveform of the waveform of several continuous beats as a process target instead of a dominant waveform. Further, filter processing for waveform shaping such as noise removal and baseline fluctuation removal may be performed in advance. Further, instead of taking in an electrical signal from the electrode 111, past electrocardiogram data stored in the HDD 104 or the memory card 109a may be selected and read out.

  Next, in step S302, the vertex RT (see FIG. 4) of the R wave of the electrocardiogram data to be processed is detected. In step S303, the J point that is the end of the QRS wave is detected, and the amplitude value STj of the J point is obtained. To detect. In step S304, a vertex JT between the vertex RT and the point J is detected. This apex JT corresponds to the J wave apex. In S305, the minimum value JB between the vertex RT and the vertex JT is detected. The time point at which this minimum value JB is taken corresponds to the starting point of the J wave.

  Next, in step S306, it is determined whether or not the amplitude value Ja of the vertex JT is equal to or greater than a predetermined threshold value (for example, 0.1 mV). Here, if the amplitude value Ja is not greater than or equal to the threshold value, it is determined that there is no J wave in the guidance (step S307). On the other hand, if the amplitude value Ja is greater than or equal to the threshold value, it is determined that there is a J wave in the guidance (step S308).

  In step S309, it is determined whether or not the processing has been completed for all the guidances. If not all guidance has been completed, the next guidance is selected in step S310, and the process returns to step S301 to repeat the process. If the processing has been completed for all the guides, the process proceeds to step S311.

  In step S311, it is determined whether or not it has been determined that two or more of the lower wall leads (ie, II lead, III lead, aVF lead) have a J wave. Here, if it is determined that two or more of the lower wall leads have a J wave, the electrocardiogram data to be processed is classified as “with J wave” (step S313). On the other hand, when there are less than two guides determined to have the J wave among the lower wall guides, the process proceeds to step S312.

  In step S312, it is determined whether or not it has been determined that two or more leads among the side wall leads (ie, lead I, lead aVL, lead V4, V5, and lead V6) have a J wave. Here, when it is determined that two or more of the side wall leads have a J wave, the electrocardiogram data to be processed is classified as “with J wave” (step S313). On the other hand, if there are less than two leads determined to have a J wave among the side wall leads, the electrocardiogram data to be processed is classified as “no J wave” (step S314).

  According to the embodiment described above, a notch-shaped J wave can be automatically detected.

In the above-described embodiment, when the amplitude value Ja at the vertex JT is equal to or greater than the threshold value in step S306, it is determined that there is a J wave in the guidance. However, a modified example is also conceivable. For example, when all of the following conditions are satisfied, it may be determined that there is a J wave in the guidance.
(1) The amplitude value Ja at the vertex JT is equal to or greater than a first threshold value (for example, 0.1 mV).
(2) The minimum value JB is equal to or higher than a second threshold value (for example, 0 mV) lower than the first threshold value.
(3) The amplitude value Ja at the vertex JT is larger than the amplitude value STj at the J point.
With the above determination, the notch-shaped J wave can be determined with high accuracy.

  In the above-described embodiment, the electrocardiogram data processing apparatus has been described in the form of an electrocardiograph. However, the present invention can also be realized using a general-purpose computer such as a personal computer.

Claims (6)

  1. First detection means for detecting a first vertex RT which is the vertex of the R wave from the input electrocardiogram waveform;
    A second detection means for detecting a J point that is a terminal end of the QRS wave from the electrocardiogram waveform;
    Third detection means for detecting a second vertex JT that is a vertex between the first vertex RT and the point J;
    Fourth detection means for detecting a minimum value JB between the first vertex RT and the second vertex JT;
    Determining means for determining that the second vertex JT has a J wave when the amplitude value Ja of the second vertex JT is equal to or greater than a predetermined threshold;
    An electrocardiogram data processing apparatus comprising:
  2.   The electrocardiogram waveform is a 12-lead electrocardiogram waveform, and in the case of two or more leads among leads II, III, and aVF, it is determined that the judgment means has a J wave, or I lead, aVL lead, V4 A classifying means for classifying the electrocardiogram waveform into an electrocardiogram waveform having a J wave when the determination means determines that there is a J wave in two or more of the leads, V5 lead, and V6 lead; The electrocardiogram data processing apparatus according to claim 1, wherein
  3. The determination means includes
    (1) The amplitude value Ja at the second vertex JT is not less than a first threshold value,
    (2) The minimum value JB is not less than a second threshold value that is lower than the first threshold value, and
    (3) The electrocardiogram data processing apparatus according to claim 1 or 2, wherein when the amplitude value Ja at the second vertex JT is larger than the amplitude value STj at the point J, the ECG data processing device is determined to have a J wave. .
  4.   The electrocardiogram data processing apparatus according to claim 1, wherein the electrocardiogram waveform is a dominant waveform typically cut out as a waveform that appears most frequently.
  5.   The electrocardiogram data processing apparatus according to claim 1, wherein the electrocardiogram waveform is an averaged waveform of waveforms of a plurality of consecutive beats.
  6. A method for controlling an electrocardiogram data processing device, comprising:
    First detecting means for detecting a first vertex RT which is an apex of the R wave from the inputted electrocardiogram waveform;
    A second detecting means for detecting a point J which is a terminal end of the QRS wave from the electrocardiogram waveform;
    A third detecting means for detecting a second vertex JT that is a vertex between the first vertex RT and the point J;
    A fourth detecting means for detecting a minimum value JB between the first vertex RT and the second vertex JT;
    A step of determining, when the amplitude value Ja of the second vertex JT is equal to or greater than a predetermined threshold, that the determination means has a J wave;
    A control method for an electrocardiogram data processing apparatus, comprising:
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CN107837083A (en) * 2017-10-31 2018-03-27 太原理工大学 J wave automatic detection method based on least squares support vector machine

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JP5933138B2 (en) * 2013-12-20 2016-06-08 コーニンクレッカ フィリップス エヌ ヴェKoninklijke Philips N.V. Apparatus and method for determining occurrence of QRS complex in ECG data
CN106344006B (en) * 2016-11-03 2018-06-26 太原理工大学 J pole detection method based on a symmetric wave mode decomposition and support vector machine
CN108143408B (en) * 2017-12-25 2019-06-14 广东工业大学 A kind of identification extracting method, device and the medium of J wave

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JP5413869B2 (en) * 2006-10-13 2014-02-12 フクダ電子株式会社 ECG automatic analyzer and electrocardiogram automatic analysis program
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CN107837083A (en) * 2017-10-31 2018-03-27 太原理工大学 J wave automatic detection method based on least squares support vector machine
CN107837083B (en) * 2017-10-31 2019-05-10 太原理工大学 J wave automatic testing method based on least square method supporting vector machine

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