Use of impedance cardiography for assessing cardiovascular control in humans: orthostatic and Valsalva tests.
The purpose of this paper is to review our experience with impedance cardiography when used to evaluate cardiovascular control mechanisms in humans. We used the Minnesota impedance cardiograph and the Kubicek stroke volume formula, modified by using spot electrodes instead of band electrodes, a constant rho of 135, and careful attention to standardized procedures. With this technique we focused on the changes in cardiovascular variables with postural stress and during the Valsalva maneuver. More complete definition of cardiovascular function can be obtained by the use of this technique. We describe novel cardiovascular data with the use of impedance cardiography in humans.
Gotshall
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Colorado State University, Fort Collins 80523.
Miles
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D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001341:Autonomic Nervous System / Q000503:physiopathology; D001794:Blood Pressure / Q000502:physiology*; D002302:Cardiac Output / Q000502:physiology; D002307:Cardiography, Impedance; D005260:Female; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D007362:Intensive Care Units; D008297:Male; D008875:Middle Aged; D011187:Posture / Q000502:physiology*; D011311:Pressoreceptors / Q000503:physiopathology; D012016:Reference Values; D013318:Stroke Volume / Q000502:physiology; D014636:Valsalva Maneuver / Q000502:physiology*; D016277:Ventricular Function, Left / Q000502:physiology