Equations for TTE Flashcards
1
Q
Stroke Volume
A
SV = CSA x VTI
SV = πr^2 x VTI
2
Q
What would you use SV equation for?
A
- cardiac output
- continuity equation for valve area
- regurgitant volume calculations
- intracardiac shunts
- ratio of pulmonary to systemic flow
3
Q
Velocity-pressure relationship (modified Bernoulli equation)
A
ΔP = 4v^2
4
Q
What would you use the velocity-pressure relationship (modified Bernoulli equation) for?
A
- stenotic valve gradients
- calculations of pulmonary pressures
- LV dP/dt
5
Q
Ejection Factor
A
EF = EDV - ESV
————– x 100%
EDV
6
Q
ESAP (RVSP)
A
RVSP = 4v^2 + RAP
7
Q
What is the ESAP equation for?
A
Pulmonary hypertension (PH)
