Physio Cardio 12.11.12- Definitions

Question 1

Afterload

Answer 1

Pressure that ventricles must produce to open semilunar valves and eject blood.

Question 2

What is the primary factor affeting afterload

Answer 2

pressure in aorta (left ventricle) or in pulmaonry artery (right ventricle)

Question 3

What is aortic stenosis? What can it do to afterload?

Answer 3

A narrowign of the arotic valcve or of the aorta itself

IT creates mroe resistnae, or incompetent valves hat allow regurgitation

Increase in afterload stretches the myocytes and increases abilityt o generate force (up to a limit)

Question 4

Which arteries are more compliant; large or small?

Answer 4

Large arteries are more compliant

Larger arteries expad to absorb a sig fractin of SV, 80%

Question 5

What determines compliance/

Answer 5

physical properties of tissue and tension

Question 6

What happens to LA during diastole?

Answer 6

the elastic recil maintains sufficient blood pressure to provide uninterrupted flow to capillary beds