Ambulatory monitoring of the impedance cardiogram

G. Willemsen, E.J.C. de Geus, C.H.A.M. klaver, L.J.P. van Doornen, D. Carroll

Research output: Contribution to JournalArticleAcademicpeer-review

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Abstract

The growing need for more advanced ambulatory monitoring has led to the development of an ambulatory monitor for impedance cardiography (VU-AMD). This paper presents two studies addressing the validity of the VU-AMD. In the first study, the cardiovascular responses of 25 subjects during various conditions were simultaneously recorded with the VU-AMD and a standard laboratory impedance device. Correlations between the responses of the ambulatory and laboratory devices were high, both inter- and intraindividually, except for stroke volume and cardiac output during exercise. In the second study, 26 subjects underwent 24-hr monitoring with the VU-AMD. The values obtained with the VU-AMD were realistic and varied in a predictable way over activity and posture. It is concluded that the VU-AMD is a valid device for the measurement of systolic time intervals in real- life situations, but its applicability for absolute stroke volume and cardiac output determination remains to be established.
Original languageEnglish
Pages (from-to)184-193
JournalPsychophysiology
Volume33
Issue number2
DOIs
Publication statusPublished - 1996

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