High-Bandpass Filters in Electrocardiography: Source of Error in the Interpretation of the ST Segment.

ISRN cardiology Pub Date : 2012-01-01 Epub Date: 2012-06-21 DOI:10.5402/2012/706217

F Buendía-Fuentes, M A Arnau-Vives, A Arnau-Vives, Y Jiménez-Jiménez, J Rueda-Soriano, E Zorio-Grima, A Osa-Sáez, L V Martínez-Dolz, L Almenar-Bonet, M A Palencia-Pérez

{"title":"High-Bandpass Filters in Electrocardiography: Source of Error in the Interpretation of the ST Segment.","authors":"F Buendía-Fuentes, M A Arnau-Vives, A Arnau-Vives, Y Jiménez-Jiménez, J Rueda-Soriano, E Zorio-Grima, A Osa-Sáez, L V Martínez-Dolz, L Almenar-Bonet, M A Palencia-Pérez","doi":"10.5402/2012/706217","DOIUrl":null,"url":null,"abstract":"<p><p>Introduction. Artifactual variations in the ST segment may lead to confusion with acute coronary syndromes. Objective. To evaluate how the technical characteristics of the recording mode may distort the ST segment. Material and Method. We made a series of electrocardiograms using different filter configurations in 45 asymptomatic patients. A spectral analysis of the electrocardiograms was made by discrete Fourier transforms, and an accurate recomposition of the ECG signal was obtained from the addition of successive harmonics. Digital high-pass filters of 0.05 and 0.5 Hz were used, and the resulting shapes were compared with the originals. Results. In 42 patients (93%) clinically significant alterations in ST segment level were detected. These changes were only seen in \"real time mode\" with high-pass filter of 0.5 Hz. Conclusions. Interpretation of the ST segment in \"real time mode\" should only be carried out using high-pass filters of 0.05 Hz.</p>","PeriodicalId":73519,"journal":{"name":"ISRN cardiology","volume":" ","pages":"706217"},"PeriodicalIF":0.0000,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.5402/2012/706217","citationCount":"56","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ISRN cardiology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.5402/2012/706217","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2012/6/21 0:00:00","PubModel":"Epub","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 56

Abstract

Introduction. Artifactual variations in the ST segment may lead to confusion with acute coronary syndromes. Objective. To evaluate how the technical characteristics of the recording mode may distort the ST segment. Material and Method. We made a series of electrocardiograms using different filter configurations in 45 asymptomatic patients. A spectral analysis of the electrocardiograms was made by discrete Fourier transforms, and an accurate recomposition of the ECG signal was obtained from the addition of successive harmonics. Digital high-pass filters of 0.05 and 0.5 Hz were used, and the resulting shapes were compared with the originals. Results. In 42 patients (93%) clinically significant alterations in ST segment level were detected. These changes were only seen in "real time mode" with high-pass filter of 0.5 Hz. Conclusions. Interpretation of the ST segment in "real time mode" should only be carried out using high-pass filters of 0.05 Hz.

Abstract Image

查看原文本刊更多论文

心电图中的高带通滤波器:ST段解释的误差来源。

介绍。ST段的人为变化可能导致与急性冠状动脉综合征的混淆。目标。评估记录模式的技术特征如何扭曲ST段。材料和方法。我们对45名无症状患者使用不同的滤过器配置进行了一系列的心电图。通过离散傅里叶变换对心电图进行频谱分析，并通过叠加连续谐波得到准确的心电信号重构。采用0.05 Hz和0.5 Hz的数字高通滤波器，并将得到的形状与原始形状进行比较。结果。42例(93%)患者检测到ST段水平有临床意义的改变。这些变化只有在“实时模式”下使用0.5 Hz的高通滤波器才能看到。结论。在“实时模式”下解释ST段应该只使用0.05 Hz的高通滤波器进行。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

ISRN cardiology

自引率

0.00%

发文量