Users' questions

What affects vascular function curve?

What affects vascular function curve?

Changes in blood volume or venous compliance can alter the vascular function curve by changing the mean systemic pressure and changes in total peripheral resistance will alter both curves.

What is the vascular function?

The vascular system, also called the circulatory system, is made up of the vessels that carry blood and lymph through the body. The arteries and veins carry blood throughout the body, delivering oxygen and nutrients to the body tissues and taking away tissue waste matter.

What happens to the venous return vascular function curve after increased sympathetic stimulation of veins?

(c) Sympathetic nerve stimulation causes a leftward shift of the ventricular function curve resulting in an equilibrium point with a lower venous pressure and higher cardiac output. At (c) (severe heart failure), cardiac output is decreased and venous pressure is further increased.

When does a vascular function curve intersect a cardiac output curve?

The vascular function curve is venous return as a function of right atrial pressure. A plateau is seen with right atrial pressure below 0 mmHg. The curves intersect at the steady-state operating point where cardiac output and venous return are equal.

What are the effects of exercise on the vascular system?

Effects of Exercise on Vascular Function, Structure, and Health in Humans Physical activity has profound impacts on the vasculature in humans. Acute exercise induces immediate changes in artery function, whereas repeated episodic bouts of exercise induce chronic functional adaptation and, ultimately, structural arterial remodeling.

How is the performance of the vascular system measured?

Performance is depressed by decreased inotropy, decreased heart rate, and by increased afterload. Systemic vascular function curves (sometimes called venous return curves) are generated by measuring P RA (dependent variable) as CO (independent variable) changes (black curve in figure).

Which is the best description of vascular function?

Venous return and vascular function curves are handled best by the Venous Return chapter from Young’s Control of Cardiac Output (2010).