Noninvasive monitoring of transient cardiac changes with impedance cardiography

Author

Zhang, Hongjun ; Matonick, John P. ; Li, John K-J.

Author_Institution

Dept. of Biomed. Eng., Rutgers Univ., Piscataway, NJ, USA

fYear

2002

fDate

2002

Firstpage

71

Lastpage

72

Abstract

Cardiac impedance change is important in the noninvasive evaluation of stroke volume. Its transient change during postural motion has not been extensively explored. We designed an impedance cardiography device to monitor the continuous change of the cardiac impedance during motion of the upper body. The results showed a significant increase in relative impedance levels from supine to transient state and then decreased during the upright position. Additionally, the supine position had a higher (dZ/dt)_max than sitting, resulting in a reduction in stroke volume

Keywords

cardiology; electric impedance measurement; haemodynamics; patient monitoring; blood movement; cardiac impedance change; four-spot-electrode configuration; impedance cardiography; noninvasive monitoring; postural motion; relative impedance levels; stroke volume; supine position; transient cardiac changes; two-compartment concentric model; upright position; Biomedical engineering; Biomedical monitoring; Blood; Cardiography; Cardiology; Conductivity; Electrodes; Heart; Impedance measurement; Steady-state;

fLanguage

English

Publisher

ieee

Conference_Titel

Bioengineering Conference, 2002. Proceedings of the IEEE 28th Annual Northeast

Conference_Location

Philadelphia, PA

Print_ISBN

0-7803-7419-3

Type

conf

DOI

10.1109/NEBC.2002.999470

Filename

999470