北京生物醫(yī)學(xué)工程

___________T波交替散點(diǎn)圖法的指標(biāo)檢測(cè)評(píng)估_________

An index evaluation of Poincare scatter for T-wave alternans

作者：郭慧章敏鳳蔣龍?jiān)?/a> 梁美玉龍海燕張?zhí)祜w

單位：           安徽工程大學(xué)機(jī)電學(xué)院（安徽蕪湖241000）    

關(guān)鍵詞： T波交替；散點(diǎn)圖法；譜分析法；向量長(zhǎng)度指標(biāo)

分類號(hào)：           R318.04    

出版年·卷·期（頁(yè)碼）：2016·35·2（203-207）

摘要：

目的研究心電信號(hào)散點(diǎn)圖形態(tài)特征與T波交替(T-wave alternans, TWA）的相關(guān)程度，評(píng)估形態(tài)指標(biāo)檢測(cè)T波交替存在與否的可靠性，為T波交替的檢測(cè)提供準(zhǔn)確、有效、計(jì)算簡(jiǎn)單的檢測(cè)方式。方法首先在散點(diǎn)圖圖形基礎(chǔ)上提出向量長(zhǎng)度指標(biāo)(vector length index, VLI),然后用MATLAB7.0軟件對(duì)美國(guó)MIT/BIH標(biāo)準(zhǔn)心律失常數(shù)據(jù)庫(kù)和歐洲ST-T心電數(shù)據(jù)庫(kù)進(jìn)行仿真，并將仿真所得散點(diǎn)圖法的VLI和譜分析法的Vtwa作閾值分析及相關(guān)性分析。結(jié)果仿真檢測(cè)結(jié)果顯示，在向量長(zhǎng)度指數(shù)VLI≤10 ms時(shí)，心電圖中含有TWA，否則不含TWA。根據(jù)Kappa一致性檢驗(yàn)得出：K=0.6932，即VLI與Vtwa具有很強(qiáng)的相關(guān)性。結(jié)論 VLI能夠用于檢測(cè)心電信號(hào)中是否存在T波交替。

Objective We study on the correlation between the graphic mode of Poincare scatter and T-wave alternans, and evaluate the reliability of morphological index for detecting T wave alternans presence in order to provide an accurate, effective and simple detection method of calculation for T wave alternans detection. Methods Firstly, the vector length index (VLI) based on the graph of the scatter plot is presented. Then VLI proposed in the scatter plot graph simulates the American Standard MIT/BIH arrhythmia database and the European ST-T ECG database by MATLAB7.0. Lastly, the results of VLI and Vtwa are compared to determine the threshold and make the correlation analysis. Results The simulation test results indicate that TWA is present in electrocardiogram (ECG) as VLI is equal to or less than 10 ms. Otherwise, TWA is absent. The kappa consistency test is K=0.6932, namely VLI and Vtwa has a strong correlation. Conclusions VLI can be used for the detection of T-wave alternans.

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