EROA – Mitral Regurgitation Calculator
Calculate Effective Regurgitant Orifice Area for mitral regurgitation assessment
EROA Calculation
What is EROA?
The Effective Regurgitant Orifice Area (EROA) is a key parameter for quantifying mitral regurgitation severity. It represents the cross-sectional area of the regurgitant jet and is measured in cm².
Formula: EROA = Regurgitant Volume ÷ Regurgitant Time Velocity Integral
This calculator uses the simplified PISA method for EROA estimation.
cm²
Calculation Details
Regurgitant Volume:
Regurgitant TVI:
EROA:
Formula Used:
EROA = Volume ÷ TVI
Severity Guidelines
Mild:
<0.20 cm²
Moderate:
0.20 - 0.39 cm²
Severe:
≥0.40 cm²
Your Severity: