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Noninvasive aortic bloodflow by Pulsed Doppler Echocardiography (PDE) compared to cardiac output by the direct Fick procedureLeft ventricular stroke volume was estimated from the systolic velocity integral in the ascending aorta by pulsed Doppler Echocardiography (PDE) and the cross sectional area of the aorta estimated by M mode echocardiography on 15 patients with coronary disease undergoing right catheterization for diagnostic purposes. Cardiac output was calculated from stroke volume and heart volume using the PDE method as well as the Fick procedure for comparison. The mean value for the cardiac output via the PDE method (4.42 L/min) was only 6% lower than for the cardiac output obtained from the Fick procedure (4.69 L/min) and the correlation between the two methods was excellent (r=0.967, p less than .01). The good agreement between the two methods demonstrates that the PDE technique offers a reliable noninvasive alternative for estimating cardiac output, requiring no active cooperation by the subject. It was concluded that the Doppler method is superior to the Fick method in that it provides beat by beat information on cardiac performance.
Document ID
19810012180
Acquisition Source
Legacy CDMS
Document Type
Other
Date Acquired
August 11, 2013
Publication Date
July 1, 1980
Publication Information
Publication: Spec. Physiol. Studies in Support of Manned Space Flight
Subject Category
Aerospace Medicine
Accession Number
81N20709
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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