Equations Flashcards
1
Q
Mean Arterial Pressure (MAP)
A
MAP = CO x TPR MAP = 2/3 (DBP) + 1/3 (SBP)
2
Q
Cardiac Output
A
CO = HR x SV (stroke volume)
3
Q
Velocity of Blood Flow
A
V = Q/A Q = flow A = cross sectional area
4
Q
Blood Flow
A
Q = delta P/R
delta P = pressure difference
R = resistance (changes 4 fold w/ change in radius of vessel - Poiseuille’s law)
5
Q
Stroke volume
A
SV = EDV - ESV
6
Q
Ejection Fraction
A
EF% = SV/EDV x 100
7
Q
Stroke work
A
SV x aortic pressure
8
Q
Fick Principle
A
CO = O2 consumption/ ([O2]pulmonary vein – [O2]pulmonary artery)
9
Q
Total Peripheral Resistance
A
TPR = (Pa-Pra)/CO
P: arterial pressure
Pra: right atrial pressure
10
Q
Pulse pressure
A
Pulse pressure = systolic - diastolic; proportional to SV
11
Q
Starling forces equation
A
driving force = (Pc - Pi) - (pic - pii)
