Health

EROA Calculator (PISA Method)

Quantify valvular regurgitation severity.

PISA Radius (cm)

Aliasing Velocity (cm/s)

Peak Regurgitant Velocity (cm/s)

EROA—

Regurgitant Flow Rate—

Severity (MR)—

Flow Rate = 2π × r² × V_aliasing
EROA = Flow Rate / Peak V
MR: Mild <0.20, Moderate 0.20–0.39, Severe ≥0.40 cm²