NDLI: Do epicardial electrogram and monophasic action potential techniques reflect similar electrical activity?

Content Provider	IEEE Xplore Digital Library
Author	Amitzur, G. Glukovsky, A. Lev-Ran, V. Adam, D. Kaplinsky, E. Eldar, M.
Copyright Year	1995
Description	Author affiliation: Neufeld Cardiac Res. Inst., Tel Aviv Univ., Israel (Amitzur, G.)
Abstract	The authors tested whether: (1) epicardial monophasic action potential (MAP) and electrogram (EG) record different signals during the same tachyarrhythmia (TA); (2) the correlation between close and far bipolar signals is similar in TAs. Different TAs were induced in isolated perfused feline hearts. Two bipolar (close sites) epicardial EG and two MAP electrodes were attached to the left ventricle (10 mm apart). Bipolar EG electrodes were also attached to the right ventricle (far EG). 30" recordings were sampled at 200 Hz per channel. Coherence spectrum analysis (CSA) (scale 0-1) was used to assess correlation between electrical activity signals. The results (n=33) showed that mean CSA value was higher in MAP vs. close bipolar EG signals (0.6/spl plusmn/0.24 vs 0.54/spl plusmn/0.2 respectively) (p<0.04), due to high MAP prevalence on CSA>0.6. Lower CSA values were obtained with far (0.48/spl plusmn/0.21) vs. close EG sites (p<0.08). It is concluded that electrical activity during TA is displayed differently by MAP and EG. This is associated with the difference in correlation between close and far sites.
Starting Page	433
Ending Page	435
File Size	297609
Page Count	3
File Format	PDF
ISBN	0780330536
DOI	10.1109/CIC.1995.482678
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-09-10
Publisher Place	Austria
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electrodes Testing Signal analysis Heart Morphology Local activities Fast Fourier transforms Biomedical engineering Biomedical measurements Electric variables measurement
Content Type	Text
Resource Type	Article

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