Cardiac output

Question 1

What is the equation for cardiac output?

Answer 1

HR x SV

Question 2

Preload

Answer 2

End diastolic pressure when ventricle has become filled (venous return)

Question 3

Afterload

Answer 3

Aortic pressure (TPR)

Question 4

What does an increase in EDV (preload) do to SV?

Answer 4

Increase

Question 5

What does an increase in afterload do to SV?

Answer 5

Decrease

Question 6

What does a positive inotropic agent (increasing contractility) do to SV?

Answer 6

Increase

Question 7

What does diastolic heart failure do to the pressure volume curve?

Answer 7

Shifts upward - increasing pressure at same volume

Question 8

If right atrial pressure = mean systemic filling pressure, what is the venous return?

Answer 8

Zero

Question 9

Do changes in arteriolar tone change the overall mean systemic filling pressure?

Answer 9

No

Question 10

What is the oxygen Fick principle in equation form?

Answer 10

Oxygen absorbed by lungs / AV oxygen difference = cardiac output

Question 11

Reduced TPR will have what effect on cardiac output?

Answer 11

Increase

Question 12

Heart damage, decreased blood volume, acute venous dilation / venous obstruction, or decreased tissue mass / metabolism will have what effect on cardiac output?

Answer 12

Decrease