Analysis of high-frequency signal-averaged ECG measurements

Xue, Qiuzhen; Reddy, B.R.S.; Aversano, Thomas

doi:10.1016/s0022-0736(95)80065-4

Cited by 15 publications

(7 citation statements)

References 12 publications

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“…Although accurate delineation of the QRS interval is an even greater challenge, especially in a real-time application, the influence on the RMS voltage of a slight inaccuracy of QRS interval delineation can be dampened greatly by "padding" the QRS interval, eg, by 10 ms on either side. 36 The NASA software therefore also incorporates an optional and adjustable pad to the QRS interval for HF QRS analyses.…”

Section: Clinician-device Interactionmentioning

confidence: 99%

Real-Time 12-Lead High-Frequency QRS Electrocardiography for Enhanced Detection of Myocardial Ischemia and Coronary Artery Disease

Schlegel

Kulecz

DePalma

et al. 2004

Mayo Clinic Proceedings

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Several studies have shown that diminution of the high-frequency (HF; 150-250 Hz) components present within the central portion of the QRS complex of an electrocardiogram (ECG) is a more sensitive indicator for the presence of myocardial ischemia than are changes in the ST segments of the conventional low-frequency ECG. However, until now, no device has been capable of displaying, in real time on a beat-to-beat basis, changes in these HF QRS ECG components in a continuously monitored patient. Although several software programs have been designed to acquire the HF components over the entire QRS interval, such programs have involved laborious off-line calculations and postprocessing, limiting their clinical utility. We describe a personal computer-based ECG software program developed recently at the National Aeronautics and Space Administration (NASA) that acquires, analyzes, and displays HF QRS components in each of the 12 conventional ECG leads in real time. The system also updates these signals and their related derived parameters in real time on a beat-to-beat basis for any chosen monitoring period and simultaneously displays the diagnostic information from the conventional (low-frequency) 12-lead ECG. The real-time NASA HF QRS ECG software is being evaluated currently in multiple clinical settings in North America. We describe its potential usefulness in the diagnosis of myocardial ischemia and coronary artery disease.

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Section: Clinician-device Interactionmentioning

confidence: 99%

Real-Time 12-Lead High-Frequency QRS Electrocardiography for Enhanced Detection of Myocardial Ischemia and Coronary Artery Disease

Schlegel

Kulecz

DePalma

et al. 2004

Mayo Clinic Proceedings

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“…The HF-6 QRS during the entire QRS duration were expressed as root-mean-square values for each individual lead. The QRS onset and offset were determined from the signal-averaged ECGs in the standard frequency range (20,21).…”

Section: High-frequency Ecgmentioning

confidence: 99%

High-frequency electrocardiogram as a supplement to standard 12-lead ischemia monitoring during reperfusion therapy of acute inferior myocardial infarction

Pettersson

Wagner

Sörnmo

et al. 2011

Journal of Electrocardiology

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“…In the analysis, the determination of QRS onset and offset is a critical step, and an incorrect delineation affects the RMS value. It has been shown that this source of error can be reduced by using the standard frequency QRS for the delineation (Xue et al. , 1995).…”

Section: Analysis Of Hf‐qrsmentioning

confidence: 99%

High‐frequency QRS electrocardiogram

Trägårdh

Schlegel

2007

Clin Physio Funct Imaging

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The standard 12-lead electrocardiogram (ECG) is one of the most commonly used methods for diagnosing heart disease. Standard ECG is not always optimal, however, and new ECG methods can provide additional information. Analysis of high-frequency QRS components (HF-QRS) has been shown to increase the diagnostic performance of the ECG. Several investigators have studied HF-QRS in different cardiac conditions, including acute myocardial ischaemia and myocardial infarction, but more knowledge is needed about the characteristics of HF-QRS before clinicians can use it as an adjunct to standard ECG.

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Analysis of high-frequency signal-averaged ECG measurements

Cited by 15 publications

References 12 publications

Real-Time 12-Lead High-Frequency QRS Electrocardiography for Enhanced Detection of Myocardial Ischemia and Coronary Artery Disease

Real-Time 12-Lead High-Frequency QRS Electrocardiography for Enhanced Detection of Myocardial Ischemia and Coronary Artery Disease

High-frequency electrocardiogram as a supplement to standard 12-lead ischemia monitoring during reperfusion therapy of acute inferior myocardial infarction

High‐frequency QRS electrocardiogram

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