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Month-to-month and year-to-year reproducibility of high frequency QRS ECG signalsHigh frequency electrocardiography analyzing the entire QRS complex in the frequency range of 150 to 250 Hz may prove useful in the detection of coronary artery disease, yet the long-term stability of these waveforms has not been fully characterized. Therefore, we prospectively investigated the reproducibility of the root mean squared voltage, kurtosis, and the presence versus absence of reduced amplitude zones in signal averaged 12-lead high frequency QRS recordings acquired in the supine position one month apart in 16 subjects and one year apart in 27 subjects. Reproducibility of root mean squared voltage and kurtosis was excellent over these time intervals in the limb leads, and acceptable in the precordial leads using both the V-lead and CR-lead derivations. The relative error of root mean squared voltage was 12% month-to-month and 16% year-to-year in the serial recordings when averaged over all 12 leads. Reduced amplitude zones were also reproducible up to a rate of 87% and 81%, respectively, for the month-to-month and year-to-year recordings. We conclude that 12-lead high frequency QRS electrocardiograms are sufficiently reproducible for clinical use.
Document ID
20050149632
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Batdorf, Niles J.
(NASA Johnson Space Center Houston, TX United States)
Feiveson, Alan H.
Schlegel, Todd T.
Date Acquired
August 23, 2013
Publication Date
October 1, 2004
Publication Information
Publication: Journal of electrocardiology
Volume: 37
Issue: 4
ISSN: 0022-0736
Subject Category
Life Sciences (General)
Distribution Limits
Public
Copyright
Other

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