Adv Physiol Educ AJP: Regulatory, Integrative and Comparative Physiology
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Advan. Physiol. Edu. 25: 44-52, 2001;
1043-4046/01 $5.00
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ADV PHYSIOL EDUC 25:44-52, 2001
© 2001 American Physiological Society

Innovations and Ideas

HEMODYNAMICS FOR MEDICAL STUDENTS

Henry S. Badeer

Department of Biomedical Sciences, Creighton University School of Medicine, Omaha, Nebraska 68178

The flow of blood through the cardiovascular system depends on basic principles of liquid flow in tubes elucidated by Bernoulli and Poiseuille. The elementary equations are described involving pressures related to velocity, acceleration/deceleration, gravity, and viscous resistance to flow (Bernoulli-Poiseuille equation). The roles of vascular diameter and number of branches are emphasized. In the closed vascular system, the importance of gravity is deemphasized, and the occurrence of turbulence in large vessels is pointed out.

Key words: streamline flow; volume flow; velocity; viscous flow pressure; kinetic pressure; gravitational pressure and potential; vascular diameter; number of branches; turbulence




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