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Cardiac chamber volumes by echocardiography using a new mathematical method: A promising technique for zero-G useAccurate, reproducible, and non-invasive means for ventricular volume determination are needed for evaluating cardiovascular function zero-gravity. Current echocardiographic methods, particularly for the right ventricle, suffer from a large standard error. A new mathematical approach, recently described by Watanabe et al., was tested on 1 normal formalin-fixed human hearts suspended in a mineral oil bath. Volumes are estimated from multiple two-dimensional echocardiographic views recorded from a single point at sequential angles. The product of sectional cavity area and center of mass for each view summed over the range of angles (using a trapezoidal rule) gives volume. Multiple (8-14) short axis right ventricle and left ventricle views at 5.0 deg intervals were videotaped. The images were digitized by two independent observers (leading-edge to leading-edge technique) and analyzed using a graphics tablet and microcomputer. Actual volumes were determined by filling the chambers with water. These data were compared to the mean of the two echo measurements.
Document ID
19840010806
Document Type
Conference Paper
Authors
Buckey, J. C.
(Texas Univ. Health Science Center Dallas, TX, United States)
Beattie, J. M.
(Texas Univ. Health Science Center Dallas, TX, United States)
Gaffney, F. A.
(Texas Univ. Health Science Center Dallas, TX, United States)
Nixon, J. V.
(Texas Univ. Health Science Center Dallas, TX, United States)
Blomqvist, C. G.
(Texas Univ. Health Science Center Dallas, TX, United States)
Date Acquired
August 12, 2013
Publication Date
February 1, 1984
Publication Information
Publication: NASA. Washington NASA Space Biol. Program
Subject Category
Life Sciences (General)
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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