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Books > Medicine > Clinical & internal medicine > Cardiovascular medicine
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Simulation and Imaging of the Cardiac System - State of the Heart (Paperback, Softcover reprint of the original 1st ed. 1985)
Loot Price: R1,567
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Simulation and Imaging of the Cardiac System - State of the Heart (Paperback, Softcover reprint of the original 1st ed. 1985)
Series: Developments in Cardiovascular Medicine, 43
Expected to ship within 10 - 15 working days
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The ultrasound velocity tomography allows measurement of cardiac
geometries for various phases in the cardiac cycle. The present
tomograph makes reconstruc tions at intervals of 20 ms. Because of
a lack of clear (intramural) landmarks (except the roots of the
papillairy muscle), it is difficult to pinpoint spatial
trajectories of particular points in the heart. Therefore, a second
method was developed of injecting radiopaque markers in the heart
and following their motion patterns during the cardiac cycle with
help of a biplane X-ray equipment. The data obtained with both
methods can be implemented in our finite element model of the heart
to compute intramural stresses and strains. The results obtained
sofar with the extended Darcy equation to account for the
interaction of blood rheology and tissue mechanics look promising.
Further testing with more sophisticated subjects than mentioned in
Figure 9 is required before it will be implemented in our finite
element model of the heart. We conclude that analysis of regional
cardiac function, including regional myocardial blood flow,
requires still a major research effort but the results obtained
sofar justify, to our opinion, a continuation in this direction.
Acknowledgement The authors acknowledge Dr. C. Borst and coworkers
for doing the animal experiments and prof. Van Campen and dr.
Grootenboer for their participation is some aspects of this work."
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