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TWA measuring apparatus and TWA measuring method

A technology of measurement device and measurement method, which is applied in bioelectric signal measurement, diagnostic recording/measurement, medical science, etc.

Active Publication Date: 2013-10-23
NIHON KOHDEN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] Thus, it is to be expected that patients with poor prognosis are present among those identified as undecidable, and confusion arises in the interpretation of undecidable determinations

Method used

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  • TWA measuring apparatus and TWA measuring method
  • TWA measuring apparatus and TWA measuring method

Examples

Experimental program
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Effect test

Embodiment 1）

[0050] Hereinafter, the TWA measuring device and the TWA measuring method of Embodiment 1 will be described. In this embodiment, the electrocardiogram waveform acquired by the measuring electrodes of the electrocardiogram is divided into two groups in increments of two beats, and the statistical difference of the measured values ​​between the two groups is detected, thereby enabling TWA to be accurately measured .

[0051] (Structure of TWA measuring device)

[0052] figure 1 is a block diagram of the TWA measuring device of the first embodiment. The TWA measuring device of Embodiment 1 was arranged in the electrocardiograph.

[0053] As shown in the figure, the TWA measurement device 100 includes an electrocardiograph control unit 110 , measurement electrodes 120 , a display unit 130 , a patient information input unit 140 , a patient information storage unit 150 , and a TWA measurement unit 160 .

[0054] The electrocardiograph control section 110 generally controls opera...

Embodiment 2）

[0146] Hereinafter, a TWA measuring device and a TWA measuring method of Embodiment 2 will be described. In this embodiment, the electrocardiogram waveform acquired by the measuring electrodes of the electrocardiograph is divided into two groups in increments of two beats, and into three groups in increments of three beats. Statistical differences between groups of measurements were then detected for each beat, and the presence of a mixture of significant statistical differences was checked to determine the presence of TWA.

[0147] (Structure of TWA measuring device)

[0148] The structure of the TWA measurement device of Embodiment 2 and figure 1 with figure 2 The construction shown in is exactly the same. However, only the grouping section 112 , the detection section 116 , and the heartbeat condition determination section 118 of the electrocardiograph control section 110 are functionally different from those of Embodiment 1.

[0149] For each of a plurality of incremen...

Embodiment 3）

[0188] Hereinafter, a TWA measuring device and a TWA measuring method of Embodiment 3 will be described. In this embodiment, an electrocardiogram data input section is provided instead of the measurement electrodes 120 in Embodiment 1. The processes executed up to determining whether or not the presence of TWA is present based on the acquired electrocardiogram waveform are exactly the same as those of Embodiment 1. That is, execute with Figure 3 to Figure 6 The processing is exactly the same as that shown in the flowchart.

[0189] Although the TWA measuring device of Embodiment 1 is set in an electrocardiograph, the TWA measuring device of this embodiment is set in a computer instead of an electrocardiograph. This embodiment is used in cases where data is collected over a long period of time as in an electrocardiograph such as a Holter electrocardiograph or a monitoring electrocardiograph, and is downloaded to a computer for use in determining the presence or absence of TW...

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Abstract

A T-wave alternans (TWA) measuring apparatus is configured to group electrocardiogram (ECG) waveforms in increments of a first beat, to test a statistical intergroup difference for the correponding first groups, and to determine that a heartbeat condition is unstable, when a significant statistical difference exists between the first groups. The apparatus is further configured to determine the magnitude of TWA when it is determined that the heartbeat condition is unstable. The ECG waveforms may further be grouped in increments of a second beat number to generate second groups, and to determine that the heartbeat condition is unstable when a significant statistical difference exists between the first groups but not between the second groups.

Description

[0001] Cross References to Related Applications [0002] This application is based on and claims priority from prior Japanese Patent Application No. 2012-081478 filed on March 30, 2012, the entire contents of which are incorporated herein by reference. technical field [0003] The presently disclosed subject matter relates to a TWA measurement device and a TWA measurement method that can accurately measure the presence of TWA (T-wave alternation). Background technique [0004] TWA occurs during episodes such as long QT syndrome, variant angina, acute myocardial ischemia, electrolyte abnormalities, paroxysmal tachycardia, bradycardia, or pericardial effusion. TWA is a phenomenon in which the amplitude and polarity of T waves appearing in an electrocardiogram are alternately changed, and is an index effective for predicting sudden cardiac death. TWA is not always a phenomenon that can be observed with the naked eye, and therefore, its application in the clinic is limited. ...

Claims

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Application Information

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IPC IPC(8): A61B5/0452A61B5/366
CPCA61B5/7246A61B5/0452A61B5/0472A61B5/349A61B5/366A61B5/355
Inventor 贝阿弥隆高柳恒夫田中雅人
Owner NIHON KOHDEN CORP
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