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Comparison of Spot and Band Impedance Cardiogram Electrodes across Different Tasks
Author(s) -
Boomsma Dorret I.,
Vries Johan de,
Orlebeke Jacob F.
Publication year - 1989
Publication title -
psychophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.661
H-Index - 156
eISSN - 1469-8986
pISSN - 0048-5772
DOI - 10.1111/j.1469-8986.1989.tb03174.x
Subject(s) - impedance cardiography , stroke volume , cardiology , phonocardiogram , electrode , focused impedance measurement , electrical impedance , beat (acoustics) , medicine , biomedical engineering , ejection fraction , acoustics , chemistry , heart failure , electrical engineering , physics , engineering
Impedance cardiography has become of widespread interest as a noninvasive cardiovascular monitoring technique. This study compared the use of spot electrodes and two different types of band electrodes in the determination of systolic time intervals and stroke volume. EKG, impedance cardiogram, and phonocardiogram were recorded on 12 volunteers during rest, during a reaction time task, and after a short exercise task. Systolic time intervals (pre‐ejection period and left ventricular ejection time) were computed on a beat‐to‐beat basis and on the ensemble‐averaged signals. The only differences between spot and band electrodes were for impedance base level and electrode conductance. For stroke volume and the systolic time interval measures there were no differences between electrode arrays, nor were there any interactions with tasks. Correlations for stroke volume and systolic time interval measures as determined under different electrode conditions were around 8.