Doppler Hemodynamics

Question 1

Flow rate

Answer 1

area x velocity

Question 2

Volume

Answer 2

area x time velocity integral (TVI)

Question 3

Qp/Qs

Answer 3

(Area(RVOT)xTVI(RVOT))/(Area(LVOT)xTVI(LVOT))

Question 4

Continuity Equation

Aortic Valve Area (AVA)

Answer 4

(LVOT area x LVOT TVI)/ AV TVI

Question 5

Pressure Half Time (PHT)

Answer 5

0.29 x deceleration time (DT)

Question 6

Mitral valve area

calculated from PHT

Answer 6

220/PHT

Question 7

RVSP

Answer 7

4 x V(TR)2 + RAP

Question 8

PAEDP

Answer 8

4 x V(End PR)2 + RAP

Question 9

RVSP

with VSD

Answer 9

SBP- 4xV(systolic VSD)2

Question 10

LVEDP

Answer 10

DBP- 4 x V(End AR)2

Question 11

LAP

with MR

Answer 11

SBP- 4 x V(MR)2

Question 12

LAP

with PFO

Answer 12

4 x V(PFO)2 +RAP

Question 13

PVR

Answer 13

(V(TR)/TVI(RVOT)) x 10 + 0.16

Question 14

Effective regurgitant orfice (ERO)

Proximal isovelocity surface arera (PISA) regurgitation

Answer 14

2(3.14) x radius2 x aliasing velocity/Vmax

Question 15

Regurgitant volume

PISA

Answer 15

ERO x TVI(Regurgitation)

Question 16

Mitral valve area (MVA)

PISA stenosis

Answer 16

2(3.14) x radius2 x aliasing velocity/Vmax x (a/180)