Canadian Medical Guide > Biological Sciences > Circulatory and Respiratory Physiology > Cardiovascular Physiology > Cardiovascular Physiologic Phenomena > Hemodynamic Phenomena Terms and Definitions

Hemodynamic Phenomena

Medical Definition:	Observable or measurable characteristics of the BLOOD CIRCULATION.
Guide Notes:	not used for indexing or cataloging; use specific indentations; for hemodynamics in general, use HEMODYNAMIC PROCESSES
Previously Indexed:	Hemodynamic Processes (1976-2003)

Hemodynamic Phenomena Categories.

	Blood Pressure - PRESSURE of the BLOOD on the ARTERIES and other BLOOD VESSELS.
	Cardiac Volume - The volume of the HEART, usually relating to the volume of BLOOD contained within it at various periods of the cardiac cycle. The amount of blood ejected from a ventricle at each beat is STROKE VOLUME.
	Heart Rate - The number of times the HEART VENTRICLES contract per unit of time, usually per minute.
	Heart Sounds - The sounds heard over the cardiac region produced by the functioning of the heart. There are four distinct sounds: the first occurs at the beginning of SYSTOLE and is heard as a "lubb" sound; the second is produced by the closing of the AORTIC VALVE and PULMONARY VALVE and is heard as a "dupp" sound; the third is produced by vibrations of the ventricular walls when suddenly distended by the rush of blood from the HEART ATRIA; and the fourth is produced by atrial contraction and ventricular filling.
	Vascular Capacitance - The measure of a BLOOD VESSEL's ability to increase the volume of BLOOD it holds without a large increase in BLOOD PRESSURE. The vascular capacitance is equal to the change in volume divided by the change in pressure.
	Vascular Resistance - The force that opposes the flow of BLOOD through a vascular bed. It is equal to the difference in BLOOD PRESSURE across the vascular bed divided by the CARDIAC OUTPUT.
	Ventricular Pressure - The pressure within a CARDIAC VENTRICLE. Ventricular pressure waveforms can be measured in the beating heart by catheterization or estimated using imaging techniques (e.g., DOPPLER ECHOCARDIOGRAPHY). The information is useful in evaluating the function of the MYOCARDIUM; CARDIAC VALVES; and PERICARDIUM, particularly with simultaneous measurement of other (e.g., aortic or atrial) pressures.

Hemodynamic Phenomena Medical Definitions and Terms

CANADIAN MEDICAL GUIDE

Thank you for visiting Canadian Medical Guide .com

Wildlife On Video »

Canada's Great Outdoors
Tour Canadian Rockies »
Book Banff »
Book Jasper »
Maligne Lake Boat Cruise »
Gondola Banff »
Hike Jasper »
Jasper Columbia Icefield »