Only Equations

Question 1

Stroke volume

Answer 1

SV=EDV-ESV

Question 2

Ejection fraction

Answer 2

SV/EDV x 100

Question 3

Cardiac output

Answer 3

CO=SV x HR

Question 4

Left ventricular stroke work (LVSW)

2 ways

Answer 4

LVSW= SV x LVPP
OR
LVSW= SV x MAP***

Question 5

LV work index

Answer 5

=LVSW/SA

Question 6

Cardiac index

Answer 6

CO/SA

Question 7

LV minute work

Answer 7

LVSW x HR

Question 8

Compliance

Answer 8

🔺V
C=——
🔺P

(”COMPanies Validate Parking”)

Question 9

MAP

2 ways

Answer 9

MAP=CO x TPR

MAP= DP + 1/3 PP

Question 10

Flow (Q)

Aka ohms law

Answer 10

🔺P
Q=——
R

Question 11

Net filtration pressure (NFP)

Answer 11

NFP= Pc + πi - Pi - πc

Pc= capillary hydrostatic pressure
πi= oncotic pressure of interstitial fluid
Pi= interstitial fluid hydrostatic pressure
πc=oncotic pressure of capillaries

Question 12

If NFP is positive, it means?

Answer 12

Filtration

Question 13

If NFP is negative it means?

Answer 13

Absorption

Question 14

Rate of fluid movement (F)

Answer 14

F=Kf x NFP

Kf is the filtration coefficient which will be given

Question 15

Flow (Q̇)

Answer 15

Q̇ =v x A

v=velocity

A= cross sectional area of a vessel

Question 16

What is the ratio of Q̇ to length?

Answer 16

1/L

So if L doubles, Q̇ will be cut in half

Question 17

What is the ratio of Q̇ to radius

Answer 17

r to the 4th power!!!!

So if the radius was 1, and you double it to 2, Q̇ will increase by 16

Question 18

What is the ratio of Q̇ to resistance (η)

Answer 18

1/η

So if η doubles, then Q̇ will be cut in half

Question 19

How do you calculate the area of a circle

Answer 19

π r-squared

Question 20

How do you calculate parallel resistances?

Answer 20

1/R total= 1/R1 + 1/R2 + 1/R3 etc

Question 21

How do you calculate total series resistance?

Answer 21

R total= R1 + R2 + R3 etc