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Electrocardiographic device having additional lead function and method for obtaining additional-lead electrocardiogram

An electrocardiograph, electrocardiogram technology, applied in medical science, sensors, diagnostic recording/measurement, etc., can solve problems such as difficulty in electrode placement and inability to use

Active Publication Date: 2009-08-05
NIHON KOHDEN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general, in order to keep the patient in a quiet state, it is necessary to make the patient lie on his back. Installing electrodes on the patient's back requires the patient to maintain an uncomfortable posture, and the placement of the electrodes is also quite difficult.
In addition, for V7, V8, V9 lead or V3R, V4R, V5R, V6R lead ECG with additional leads, the ordinary standard 12-lead ECG machine cannot be used, and it is necessary to use electrodes with additional leads for measurement. A dedicated electrocardiograph with integrated electrocardiogram measurement function

Method used

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  • Electrocardiographic device having additional lead function and method for obtaining additional-lead electrocardiogram
  • Electrocardiographic device having additional lead function and method for obtaining additional-lead electrocardiogram
  • Electrocardiographic device having additional lead function and method for obtaining additional-lead electrocardiogram

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0059] Embodiment 1 involves using the potential detector of the standard 12-lead electrocardiograph to measure the electrocardiogram signal at the electrode placement site of the standard 12-lead electrocardiograph, and calculating (synthesizing) the electrocardiogram including the extension line located on the chest lead for example. The V7, V8, V9 leads and V 3R , V 4R , V 5R Algorithms and devices for additional leads of leads.

[0060] That is, Embodiment 1 is used to calculate the cardiac potential (electrocardiogram) of an additional lead site from the electrocardiographic signal measured by the potential detector of a standard 12-lead electrocardiograph, for example, from a standard 12-lead electrocardiograph. The 8 ECG signals obtained (I, II, V1, V2, V3, V4, V5, V6) are synthesized into an additional lead ECG (V7, V8, V9, V 3R , V 4R , V 5R ).

[0061] (Synthesis principle of additional lead ECG based on lead vector).

[0062] According to the lead theory, cli...

Embodiment approach 2

[0109] Embodiment 2 of the present invention will be described below. The difference between Embodiment 2 and Embodiment 1 is that the additional lead ECG (V7, V8, V9, V3R , V 4R , V 5R leads).

[0110] (Principles of the derivation method of additional lead ECG based on lead vectors)

[0111] The principle of the derivation method of the additional lead electrocardiogram in Embodiment 2 is as follows.

[0112] As mentioned above, according to the lead theory, clinical electrocardiography believes that a fixed dipole (Fixed Single Dipole) can be used to approximate the cardiac power supply at any time, and the potential (V) at any lead position can be calculated by the following formula ( 2-1) ~ (2-3) to find out.

[0113] V=L·H…(2—1)

[0114] H = hx hy hz ...

Embodiment approach 3

[0131] From the invention disclosed in Patent Document 1 proposed by the present inventor, a standard 12-lead electrocardiogram is obtained by using a potential detector composed of, for example, 6 electrodes as a subset of the lead system composed of the minimum number of channels. Leads I and II of the extremities leads and leads V2 and V4 which are the two leads of the chest lead, (1) according to the inherent relationship of each lead shown in the above table 1, calculate Out of the third lead and aV lead (aVR lead, aVL lead, aVF lead). And (2) leads V1, V3, V5, and V6, which are the remaining leads of the chest, can be calculated according to the relationship between the potential V / lead vector L and the heart vector H. out.

[0132] Therefore, in Embodiment 3, after adopting the standard lead potential (the electrocardiogram signal of I, II, V2, V4) in the standard 12-lead electrocardiogram that adopts the potential detector that is made up of below 10 electrodes to mea...

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Abstract

An electrocardiogram machine with an additional lead function and an additional Lead ECG export method. Electrocardiographic signals measured by the potential detector (10) as a standard 12-lead electrocardiogram are stored in an electrocardiogram memory (12). The additional-lead electrocardiogram calculation unit (16) calculates the additional-lead electrocardiograms V7-V9 from the electrocardiographic signals stored in the electrocardiogram memory (12) using the coefficient α representing the relationship between the leads. The calculated additional lead electrocardiograms V7-V9 are displayed on the display monitor (20) through the additional lead electrocardiogram waveform output unit (18).

Description

technical field [0001] The invention relates to an electrocardiogram machine with additional leads capable of quickly and accurately synthesizing the additional lead electrocardiogram and a synthesis method of the additional lead electrocardiogram. This additional lead electrocardiogram enables effective diagnosis of myocardial ischemia and acute myocardial infarction at myocardial sites that are difficult to detect even with a standard 12-lead electrocardiogram. Background technique [0002] When measuring the patient's ECG, use 10 electrodes connected to the electrocardiograph, and install each electrode at 6 positions for measuring chest leads and 4 positions for measuring limb leads. The potential measured by the electrocardiograph through these 10 electrodes can calculate and output the standard 12-lead limb 6-lead waveform (I, II, III, aVR, aVL, aVF), and the standard 12-lead chest 6-lead Waveforms (V1, V2, V3, V4, V5, V6). [0003] In general, the relationship betwe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/0402
Inventor 魏大名
Owner NIHON KOHDEN CORP