What is the difference between rap and cvp

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Venous Return. Freeman B. Brian S. Freeman, and Jeffrey S. McGraw Hill; Accessed November 14, Venous return. McGraw Hill. Download citation file: RIS Zotero. Reference Manager. Autosuggest Results. Table Graphic Jump Location. View Table Download. Subscribe: Institutional or Individual. Username Error: Please enter User Name. Password Error: Please enter Password. Forgot Password? Also Visit CVpharmacology. Click here for information on Cardiovascular Physiology Concepts, 3rd edition, a textbook published by Wolters Kluwer Klabunde Venous pressure is a term that represents the average blood pressure within the venous compartment.

The term " central venous pressure " CVP describes the pressure in the thoracic vena cava near the right atrium therefore CVP and right atrial pressure are essentially the same. CVP is an important concept in clinical cardiology because it is a major determinant of the filling pressure and therefore the preload of the right ventricle, which regulates stroke volume through the Frank-Starling mechanism.

Therefore, CVP is increased by either an increase in venous blood volume or by a decrease in venous compliance. The latter change can be caused by contraction of the smooth muscle within the veins, which increases the venous vascular tone and decreases compliance. The effects of increased venous blood volume and decreased venous compliance on CVP are illustrated in the figure to the right. In this figure, point A represents a control operating point for the venous vasculature.

The curve that point A is on is the compliance curve for the thoracic veins. If the volume of blood within these veins is increased, then the operating point will shift up and to the right from A to B along the same compliance curve.

This will lead to an increase in pressure that is determined by the change in volume and the venous compliance slope of the curve.