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Right and left ventricular volumes in vitro by a new nongeometric methodWe present an evaluation of a new nongeometric technique for calculating right and left ventricular volumes. This method calculates ventricular chamber volumes from multiple cross-sectional echocardiographic views taken from a single point as the echo beam is tilted progressively through the ventricle. Right and left ventricular volumes are calculated from both the approximate short axis and approximate apical position on 20 in vitro human hearts and compared with the actual chamber volumes. The results for both ventricles from both positions are excellent. Correlation coefficients are > 0.95 for all positions; the standard errors are in the range of 5 to 7 mL and the slopes and intercepts for the regression lines are not significantly different from 1 and 0, respectively (except for the left ventricular short-axis intercept). For all positions, approximately 6 to 8 views are needed for peak accuracy (7.5 degrees to 10 degrees separation). This approach offers several advantages. No geometric assumptions about ventricular shape are made. All images are acquired from a single point (or window), and the digitized points can be used to make a three-dimensional reconstruction of the ventricle. Also, during the calculations a volume distribution curve for the ventricle is produced. The shape of this curve can be characteristic for certain situations (ie, right ventricle, short axis) and can be used to make new simple equations for calculating volume. We conclude that this is an accurate nongeometric method for determining both right and left ventricular volumes in vitro.
Document ID
20040089656
Acquisition Source
Headquarters
Document Type
Reprint (Version printed in journal)
Authors
Buckey, J. C.
(University of Texas Health Science Center Dallas, United States)
Beattie, J. M.
Nixon, J. V.
Gaffney, F. A.
Blomqvist, C. G.
Date Acquired
August 21, 2013
Publication Date
July 1, 1987
Publication Information
Publication: American journal of cardiac imaging
Volume: 1
Issue: 3
ISSN: 0887-7971
Subject Category
Life Sciences (General)
Funding Number(s)
CONTRACT_GRANT: NAGW-70
CONTRACT_GRANT: NSG-9026
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Cardiopulmonary
Non-NASA Center

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