Quickly calculate the Aortic Valve Area (AVA) using our precise online tool. Essential for cardiologists and medical professionals, this calculator helps assess the severity of aortic stenosis through the Continuity Equation. Understand valve function with accurate, fast results.
Formula:
The Aortic Valve Area (AVA) is a critical measurement for evaluating aortic stenosis. This calculator primarily utilizes the Continuity Equation, a widely accepted method in echocardiography:
AVA = (LVOTd² × 0.785 × LVOT VTI) / Ao VTI
- AVA: Aortic Valve Area (cm²)
- LVOTd: Left Ventricular Outflow Tract Diameter (cm)
- LVOT VTI: Left Ventricular Outflow Tract Velocity Time Integral (cm)
- Ao VTI: Aortic Valve Velocity Time Integral (cm)
Another method, the Gorlin Formula, is based on hemodynamic data from cardiac catheterization:
AVA = (Cardiac Output (mL/min) / (Heart Rate (bpm) × Systolic Ejection Period (sec) × 44.3 × √Mean Pressure Gradient (mmHg)))