Echo A Week 10: MVA, AVA, SV by Doppler Calculations-Quiz

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The following equation(s) are methods used to calculate MVA, Except:

759 ÷ Deceleration Time (DT)

220 ÷ Pressure half time (PHT)

CSA x (LVOT VTI) ÷ (MV VTI)

CSA x VTI

0.785 x (LVOTd)² x (LVOT VTI) ÷ (MV VTI)

CSA x VTI

The AVA continuity equation is:

759 ÷ Deceleration time

CSA (LVOTd)² × (AO VTI) ÷ (LVOT VTI)

4(V)²

0.785(LVOTd)² x (LVOT VTI) ÷ (AO VTI)

CSA x VTI

0.785(LVOTd)² x (LVOT VTI) ÷ (AO VTI)

Stroke volume by Doppler is calculated by the equation:

End-diastolic volume - End- systolic volume

Cardiac output x heart rate

220 ÷ pressure half time

Cross sectional area x velocity time integral

Heart rate x stroke volume

Cross sectional area x velocity time integral

What is the normal range for AVA:

2-4cm2

4-6cm2

3-5cm2

3-5 cm2

What is the normal range for MVA:

3-5cm2

5-7cm2

4-6cm2

2-4cm2

4-6cm2

LVOTd = 2.4cm, RVOTd = 2.7cm, MV annulus = 3.0cm, MV VTI = 18cm, MV P1/2t = 85ms, MV DT = 235ms, LVOT VTI = 25cm, AoV VTI = 30cm, RVOT VTI = 19cm

Using the numbers and value above, calculate the MVA by P1/2:

2.58 cm

32.58 cm

2.58 cm

225.8 cm

2.25 cm2

2.58 cm2

LVOTd = 2.4cm, RVOTd = 2.7cm, MV annulus = 3.0cm, MV VTI = 18cm, MV P1/2t = 85ms, MV DT = 235ms, LVOT VTI = 25cm, AoV VTI = 30cm, RVOT VTI = 19cm

Using the numbers and values above, calculate the MVA by DT:

3.2 cm3

2.35 cm2

3.2 cm2

2.58 cm2

3.2 cm2

LVOTd = 2.4cm, RVOTd = 2.7cm, MV annulus = 3.0cm, MV VTI = 18cm, MV P1/2t = 85ms, MV DT = 235ms, LVOT VTI = 25cm, AoV VTI = 30cm, RVOT VTI = 19cm

Using the numbers and values above, calculate the MVA by the continuity equation:

3.2 cm2

6.28 cm3

6.28 cm2

3.77 cm2

6.28 cm2

LVOTd = 2.4cm, RVOTd = 2.7cm, MV annulus = 3.0cm, MV VTI = 18cm, MV P1/2t = 85ms, MV DT = 235ms, LVOT VTI = 25cm, AoV VTI = 30cm, RVOT VTI = 19cm

Using the numbers and values above, calculate the AVA by the continuity equation:

2.58 cm2

6.28 cm2

3.77 cm2

3.77 cm2

The normal range for Stroke volume (SV) is:

70-100 ml

58 ml

4-8 L/min

70-100 L/min

34ml/m2

70-100 ml

LVOTd = 2.4cm, RVOTd = 2.7cm, MV annulus = 3.0cm, MV VTI = 18cm, MV P1/2t = 85ms, MV DT = 235ms, LVOT VTI = 25cm, AoV VTI = 30cm, RVOT VTI = 19cm

Using the numbers and values above, calculate the LVOT SV:

113 L/min

113 ml

108.7 mL

113 ml

LVOTd = 2.4cm, RVOTd = 2.7cm, MV annulus = 3.0cm, MV VTI = 18cm, MV P1/2t = 85ms, MV DT = 235ms, LVOT VTI = 25cm, AoV VTI = 30cm, RVOT VTI = 19cm

Using the numbers and values above, calculate the RVOT SV:

113 mL

108.7 ml

108.7 L/min

100 ml

108.7 ml