Doppler Hemodynamics Flashcards
1
Q
Flow rate
A
area x velocity
2
Q
Volume
A
area x time velocity integral (TVI)
3
Q
Qp/Qs
A
(Area(RVOT)xTVI(RVOT))/(Area(LVOT)xTVI(LVOT))
4
Q
Continuity Equation
Aortic Valve Area (AVA)
A
(LVOT area x LVOT TVI)/ AV TVI
5
Q
Pressure Half Time (PHT)
A
0.29 x deceleration time (DT)
6
Q
Mitral valve area
calculated from PHT
A
220/PHT
7
Q
RVSP
A
4 x V(TR)2 + RAP
8
Q
PAEDP
A
4 x V(End PR)2 + RAP
9
Q
RVSP
with VSD
A
SBP- 4xV(systolic VSD)2
10
Q
LVEDP
A
DBP- 4 x V(End AR)2
11
Q
LAP
with MR
A
SBP- 4 x V(MR)2
12
Q
LAP
with PFO
A
4 x V(PFO)2 +RAP
13
Q
PVR
A
(V(TR)/TVI(RVOT)) x 10 + 0.16
14
Q
Effective regurgitant orfice (ERO)
Proximal isovelocity surface arera (PISA) regurgitation
A
2(3.14) x radius2 x aliasing velocity/Vmax
15
Q
Regurgitant volume
PISA
A
ERO x TVI(Regurgitation)
16
Q
Mitral valve area (MVA)
PISA stenosis
A
2(3.14) x radius2 x aliasing velocity/Vmax x (a/180)
