Cardiac Equations Flashcards
1
Q
Flow/ Cardiac Output
A
q/ co= (mean arterial pressure- mean venous pressure)/ total peripheral resistance
(given in volume/ unit time)
2
Q
Velocity
A
v= Q/ cross-sectional area
3
Q
Poiseulle (relationship between pressure, length, radius, viscosity, and flow)
A
Q= Delta P* ((Pi*r^4)/(8nl)), where n is viscosity
Resistance= (8nl)/(Pi*r^4)
4
Q
Pulse Pressure
A
PP= Peak systolic- end diastolic
Directly proportional to stroke volume, inversely proportional to arterial compliance
5
Q
Mean Arterial Pressure
A
MAP= 2/3 diastolic + 1/3 systolic
6
Q
Compliance
A
C= Change in Volume/ Change in Pressure
7
Q
Law of LaPlace (Transmural Tension)
A
T= (Change in pressure * radius of vessel)/mu
8
Q
Stroke Volume
A
SV= End Diastolic Volume - End Systolic Volume
9
Q
Ejection Fraction
A
EF= (EDV-ESV)/EDV
