Cardiac Equations

Question 1

Equation for CO

Answer 1

HR x SV

Question 2

Equation for CI

Answer 2

CO / BSA

Question 3

Both Equations for SV

Answer 3

EDV - ESV
or
CO x (1,000 / HR)

Question 4

Equation for SV Index

Answer 4

SV/BSA

Question 5

Both Equations for Ejection Fraction

Answer 5

[(EDV - ESV) / EDV ] x 100
or
SV/EDV x 100

Question 6

Both Equations for MAP

Answer 6

[SBP + (2xDBP)] / 3
or
[(CO x SVR) / 80] + CVP

Question 7

Equation for Pulse Pressure

Answer 7

SBP- DBP
or
Stroke Volume/Arterial tree compliance

Question 8

Equation for SVR

Answer 8

[(MAP-CVP) / CO] x 80

Question 9

Equation for SVRI

Answer 9

[(MAP-CVP) / CI] x 80

Question 10

Equation for PVR

Answer 10

[(MPAP-PAOP) / CO)] x 80

Question 11

Equation for PVRI

Answer 11

[(MPAP-PAOP) / CI)] x 80

Question 12

Poiseuille’s Law Equation

Answer 12

Q = (Pi x radius^4 x Delta P) / (8 x Viscosity x Length)

Question 13

Arterial Oxygen Content Equation (CaO2)

Answer 13

CaO2 = (Hgb x SaO2 x 1.34) + (PaO2 x 0.003)

Question 14

Oxygen Delivery Equation (DO2)

Answer 14

DO2 = CO x [(Hgb x SaO2 x 1.34) + (PaO2 x 0.003)] x 10

Question 15

Oxygen Extraction Ration

Answer 15

EO2 = (CaO2- CvO2) / CaO2

Question 16

Oxygen Consumption Equation (VO2)

Answer 16

VO2 = CO x (CaO2-CvO2) x 10

Question 17

Venous Oxygen Content Equation (CvO2)

Answer 17

CvO2=(Hgb x SvO2 x 1.34) + (PvO2 x 0.003)

Question 18

Equation for Wall Stress

Answer 18

Wall Stress = (Intraventricular Pressure x Radius) / Ventricular Thickness