What stops the flow of blood from the heart?

The determinants of aortic pressure and flow are generally studied using impedance methods, the results of which indicate that reflected waves are important, particularly during aortic flow deceleration. An alternative analysis of measured aortic pressure and velocity, using the method of characteri...

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Published in:Heart and vessels 1988-12, Vol.4 (4), p.241-245
Main Authors: PARKER, K. H, JONES, C. J. H, DAWSON, J. R, GIBSON, D. G
Format: Article
Language:English
Subjects:
Aorta, Thoracic - physiology
Biological and medical sciences
Fundamental and applied biological sciences. Psychology
Heart - physiology
Hemodynamics
Hemodynamics. Rheology
Humans
Myocardial Contraction
Stroke Volume
Vertebrates: cardiovascular system
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description The determinants of aortic pressure and flow are generally studied using impedance methods, the results of which indicate that reflected waves are important, particularly during aortic flow deceleration. An alternative analysis of measured aortic pressure and velocity, using the method of characteristics to calculate the energy flux per unit area of the waves, suggests a different conclusion. We suggest that aortic deceleration is caused by a discrete expansion wave propagating from the left ventricle, and that energy thus recovered by the ventricle may be coupled to early filling of the ventricle.
doi_str_mv 10.1007/bf02058593
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subjects Aorta, Thoracic - physiology
Biological and medical sciences
Fundamental and applied biological sciences. Psychology
Heart - physiology
Hemodynamics
Hemodynamics. Rheology
Humans
Myocardial Contraction
Stroke Volume
Vertebrates: cardiovascular system
title What stops the flow of blood from the heart?
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