The Cardiac function curve

Question 1

What two factors can increase right atrial pressure?

Answer 1

Right ventricle dysfunction

Increased circulating blood volume

Question 2

What does the steep portion of the cardiac function curve indicate?

Answer 2

It illustrates the frank-starling mechanism, as RAP increases CO increases .. to an extent, the plateau represents the limit to that mechanism

Question 3

What causes the shape of the cardia function curve?

Answer 3

Frank Starling and Bainbridge mechanisms explain the shape of the curve

Question 4

What three factors affect the shift in the cardiac function curve (up or down)?

Answer 4

Afterload (left out
Inotropy
Heart rate

Question 5

What is the formula for cardiac output

Answer 5

CO = HR x SV

Question 6

What three factors affect the stroke volume of the heart?

Answer 6

Preload
Afterload
Inotropy

Question 7

What regulates isotropy and after load of the heart?

Answer 7

The autonomic nervous system

Question 8

What is a helpful formula to remember for blood pressure?

Answer 8

BP = SV x HR x TPR

Question 9

How can some medical conditions increase CO without excessive excitation?

Answer 9

There is a decrease in oxygen to the tissue beds causes vasodilation