Cardiac & Vascular Function Curves EXPLAINED

The video tutorial explains cardiac and vascular function curves, focusing on the relationship between cardiac output and central venous pressure. It discusses positive slope curves, venous return, and the significance of intersection points. The impact of exercise on these curves is also analyzed, highlighting how factors like dehydration and skeletal muscle pumps affect venous return and cardiac output.

What do the two sets of curves in the cardiac and vascular function graph represent?

• Positive slope curves represent venous return; negative slope curves represent cardiac output.

• Positive slope curves represent cardiac output; negative slope curves represent venous return.

• Both sets of curves represent cardiac output.

• Both sets of curves represent venous return.

How does an increase in central venous pressure affect cardiac output?

• It decreases cardiac output.

• It has no effect on cardiac output.

• It increases cardiac output.

• It causes cardiac output to fluctuate.

What does the baseline level of venous return indicate?

• Venous return during heart failure.

• Normal venous return without any external influence.

• Pathologic venous return due to dehydration.

• Augmented venous return due to exercise.

What happens to cardiac output when blood volume decreases?

• Cardiac output remains unchanged.

• Cardiac output becomes erratic.

• Cardiac output decreases.

• Cardiac output increases.

What is the effect of injecting a saline solution on central venous pressure?

• It decreases central venous pressure.

• It causes central venous pressure to fluctuate.

• It increases central venous pressure.

• It has no effect on central venous pressure.

How does exercise affect venous return and cardiac output?

• Exercise has no effect on venous return and cardiac output.

• Exercise increases venous return and cardiac output.

• Exercise decreases venous return and cardiac output.

• Exercise causes venous return to decrease and cardiac output to increase.

What is a potential cause of diminished venous return during exercise?

• Use of positive inotropic agents.

• Dehydration due to sweating.

• Increased blood volume.

• Excessive fluid intake.

What role do skeletal muscle pumps play during exercise?

• They decrease venous return.

• They increase venous return.

• They have no effect on venous return.

• They cause venous return to fluctuate.

What is the effect of positive inotropic agents on the heart?

• They cause the heart to beat irregularly.

• They have no effect on the heart.

• They increase the force of contraction.

• They decrease the force of contraction.

What happens to venous return when blood volume is increased?

• Venous return decreases.

• Venous return remains unchanged.

• Venous return becomes erratic.

• Venous return increases.