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Real-Time 12-Lead High-Frequency QRS Electrocardiography for Enhanced Detection of Myocardial Ischemia and Coronary Artery DiseaseSeveral 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.
Document ID
20040087402
Acquisition Source
Johnson Space Center
Document Type
Reprint (Version printed in journal)
Authors
Schlegel, Todd T.
(NASA Johnson Space Center Houston TX United States)
Kulecz, Walter B.
DePalma, Jude L.
Feiveson, Alan H.
Wilson, John S.
Rahman, M. Atiar
Bungo, Michael W.
Date Acquired
August 21, 2013
Publication Date
March 1, 2004
Publication Information
Publication: Mayo Clinic proceedings
Volume: 79
Issue: 3
ISSN: 0025-6196
Subject Category
Life Sciences (General)
Report/Patent Number
JSC-CN-7669
Distribution Limits
Public
Copyright
Other

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