Projected Aortic Valve Area Calculator
Utilizing dobutamine stress echo in low-flow, low-gradient aortic stenosis
cm
m²
Resting Inputs
cm
cm
ms
Peak Dobutamine Inputs
cm
cm
ms
Resting Results
AVA at rest: - cm²
AVAi at rest: - cm²/m²
Stroke Volume (SV): - mL
Stroke Volume Index (SVi): - mL/m²
Flow Rate: - mL/s
Dimensionless Index: -
Peak Results
AVA at peak: - cm²
AVAi at peak: - cm²/m²
Stroke Volume (SV): - mL
Stroke Volume Index (SVi): - mL/m²
Flow Rate: - mL/s
Dimensionless Index: -
Change in SV: - %
PROJECTED AVA: _ cm²
Amer Kadri, MD, FACC, FSCAI, RPVI
amer.kadri@chs-mi.com
Equations Used:
1. AVA = (0.785 × LVOT Diameter² × LVOT VTI) / AV VTI
2. SV = LVOT Area × LVOT VTI
3. Flow Rate = SV / Ejection Time (in seconds)
4. ΔAVA = AVApeak - AVArest | 5. ΔQ = Flow Ratepeak - Flow Raterest
6. Change in SV (%) = (SVpeak - SVrest) / SVrest × 100
7. AVAproj = AVArest + (ΔAVA / ΔQ) × (250 - Qrest)
8. AVAi = AVA / BSA | 9. SVi = SV / BSA | 10. DI = LVOT VTI / AV VTI
1. AVA = (0.785 × LVOT Diameter² × LVOT VTI) / AV VTI
2. SV = LVOT Area × LVOT VTI
3. Flow Rate = SV / Ejection Time (in seconds)
4. ΔAVA = AVApeak - AVArest | 5. ΔQ = Flow Ratepeak - Flow Raterest
6. Change in SV (%) = (SVpeak - SVrest) / SVrest × 100
7. AVAproj = AVArest + (ΔAVA / ΔQ) × (250 - Qrest)
8. AVAi = AVA / BSA | 9. SVi = SV / BSA | 10. DI = LVOT VTI / AV VTI
Standard Aortic Valve Area Calculator
cm
m²
cm
cm
ms
Results
AVA: - cm²
AVAi: - cm²/m²
Stroke Volume: - mL
SVi: - mL/m²
Flow Rate: - mL/s
DI: -
Amer Kadri, MD, FACC, FSCAI, RPVI
amer.kadri@chs-mi.com
Equations Used:
• AVA = (0.785 × LVOT Diameter² × LVOT VTI) / AV VTI
• SV = LVOT Area × LVOT VTI | Flow Rate = SV / Ejection Time (s)
• AVAi = AVA / BSA | SVi = SV / BSA | DI = LVOT VTI / AV VTI
• AVA = (0.785 × LVOT Diameter² × LVOT VTI) / AV VTI
• SV = LVOT Area × LVOT VTI | Flow Rate = SV / Ejection Time (s)
• AVAi = AVA / BSA | SVi = SV / BSA | DI = LVOT VTI / AV VTI
EROA Calculator (PISA method)
cm/sec
cm
cm/sec
cm
Results
EROA: - cm²
Regurgitant volume: - ml/beat
Amer Kadri, MD, FACC, FSCAI, RPVI
amer.kadri@chs-mi.com
Equations Used:
• EROA = (2 × π × r² × Va) / Vmax
• Regurgitant Volume = EROA × VTI
• EROA = (2 × π × r² × Va) / Vmax
• Regurgitant Volume = EROA × VTI
Invasive Hemodynamics
Pressure Inputs
mmHg
mmHg
mmHg
m²
bpm
Method: Fick
L/min
CI: -
SV: -
SVi: -
Thermodilution
L/min
CI: -
SV: -
SVi: -
Results (Fick)
PVR: - WU
SVR: - D/S
TPG: - mmHg
CPO: - W
PAPi: -
Results (TD)
PVR: - WU
SVR: - D/S
TPG: - mmHg
CPO: - W
PAPi: -
Amer Kadri, MD, FACC, FSCAI, RPVI
amer.kadri@chs-mi.com
Equations Used:
• TPG = mPAP - PCWP
• PVR = TPG / CO | SVR = [(MAP - RA) / CO] × 80
• SV = (CO * 1000) / HR | SVi = SV / BSA
• CPO = (MAP × CO) / 451 | PAPi = (PA Systolic - PA Diastolic) / RA Mean
• TPG = mPAP - PCWP
• PVR = TPG / CO | SVR = [(MAP - RA) / CO] × 80
• SV = (CO * 1000) / HR | SVi = SV / BSA
• CPO = (MAP × CO) / 451 | PAPi = (PA Systolic - PA Diastolic) / RA Mean