P/V loop

Question 1

What happens to the loop when preload increases?

Answer 1

loop gets wider but returns

Ex: fluid bolus

Question 2

What happens to the loop when preload decreases

Answer 2

to the left but returns to normal

Ex: Diuretics

Question 3

What happens with increased contractility?

Answer 3

loop moves left with increased pressure

Ex: epi

Question 4

increased afterload

Answer 4

Pressure goes up and loop gets narrow

Question 5

decreased afterload

Answer 5

loop gets shorter and wider

Ex: nipride