Time Domain and Spectral Analysis of Electrograms in Man During Regular Ventricular Activity and Ventricular Fibrillation

Electrogram signals from intramyocardially placed wire electrodes were recorded in 24 open heart surgery patients during regular heart activity (RHA) and ventricular fibrillation (VF). Time domain parameters, maximal amplitudes (AMAX, UMAX), maximal derivatives (DMAX, SMAX), and power spectra in the...

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Bibliographic Details
Published in:IEEE transactions on biomedical engineering 1984-04, Vol.BME-31 (4), p.350-355
Main Authors: Morkrid, Lars, Ohm, Ole-Jorgen, Engedal, Hogne
Format: Article
Language:English
Subjects:
Adolescent
Adult
Aged
Anesthesia
Biological and medical sciences
Biomedical Engineering
Cardiac Surgical Procedures
Cardiology
Child
Electrocardiography. Vectocardiography
Electrodiagnosis. Electric activity recording
Female
Fibrillation
Filters
Frequency
Heart
Humans
Investigative techniques, diagnostic techniques (general aspects)
Male
Medical sciences
Middle Aged
Rhythm
Spectral analysis
Spectrum Analysis
Surgery
Time domain analysis
Ventricular Fibrillation - physiopathology
Ventricular Function
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Summary:Electrogram signals from intramyocardially placed wire electrodes were recorded in 24 open heart surgery patients during regular heart activity (RHA) and ventricular fibrillation (VF). Time domain parameters, maximal amplitudes (AMAX, UMAX), maximal derivatives (DMAX, SMAX), and power spectra in the frequency region up to 100 Hz were analyzed off-line on a digital computer. DMAX, AMAX, SMAX, and UMAX were significantly lower postoperatively than during the operation in RHA, median values reduced by 37, 23, 54, and 50 percent. Corresponding reductions in median values of 64, 39, 58, and 30 percent occurred in the transition from RHA to VF during the operation (peroperatively).
ISSN:0018-9294
1558-2531
DOI:10.1109/TBME.1984.325345