Effective Regurgitant Orifice ERO Area Calculator

Quantify effective regurgitant orifice area from PISA for classification of MR severity. ERO ≥40mm² = severe primary MR.

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Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How It Works

Quantify effective regurgitant orifice area from PISA for classification of MR severity. ERO ≥40mm² = severe primary MR

Each component has a specific meaning:

  • PISA — The pisa recorded for the scenario being assessed.

Note: Interpret the ero calculator result against the thresholds and context described above.

How to Use

Enter the PISA for the scenario you are assessing. Quantify effective regurgitant orifice area from PISA for classification of MR severity. ERO ≥40mm² = severe primary MR. Use the ero calculator result to inform your calculation.

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Frequently Asked Questions