Resting

LVOT VTI at Rest (cm): AV VTI at Rest (cm): Ejection Time at Rest (ms):

Peak Dobutamine

LVOT VTI at Peak Dobutamine (cm): AV VTI at Peak Dobutamine (cm): Ejection Time at Peak Dobutamine (ms):

AVA at rest: - cm²

AVAi at rest: - cm²/m²

Stroke Volume (SV): - mL

Stroke Volume Index (SVi): - mL/m²

Flow Rate (SV/sec): - mL/s

Dimensionless Index (DI): -

AVA at peak: - cm²

AVAi at peak: - cm²/m²

Stroke Volume (SV): - mL

Stroke Volume Index (SVi): - mL/m²

Flow Rate (SV/sec): - mL/s

Dimensionless Index (DI): -

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 = AVA_peak - AVA_rest

5. ΔQ = Flow Rate_peak - Flow Rate_rest

6. Change in SV (%) = (SV_peak - SV_rest) / SV_rest × 100

7. AVA_proj = AVA_rest + (ΔAVA / ΔQ) × (250 - Q_rest)

8. AVAi = AVA / BSA

9. SVi = SV / BSA

10. DI = LVOT VTI / AV VTI