Mitral Stenosis Severity
Assess mitral stenosis severity anchored on mitral valve area (MVA). Mean gradient provides hemodynamic context only — it does not independently classify severity. Includes PHT method accuracy warnings, AF and low-flow confounders, and etiology modifier flags.
Input
Enter available values — partial input is supported.
Mitral valve area (MVA) — primary severity anchor
MVA is the primary determinant of MS severity. Planimetry (2D or 3D) and invasive pressure gradient (IVPG) are the most reliable methods. Pressure half-time (PHT) is commonly used but is less reliable in the presence of specific conditions — see pitfall flags below.
Severe ≤ 1.5 cm² (very severe < 1.0 cm²)
MVA measurement method
Qualitative MS grade
Qualitative grade is supportive context only. When MVA is available, MVA drives the primary grade.
Mean gradient — hemodynamic context
Mean gradient is rate- and flow-dependent and reflects hemodynamic significance, not anatomic severity alone. It does not independently classify MS severity. A gradient of ≥ 10 mmHg is considered hemodynamically significant in this context.
Hemodynamically significant ≥ 10 mmHg — context only
Severity assessment
Enter MVA (with measurement method) or a qualitative MS grade to receive a severity assessment. Mean gradient and symptom data provide context only.
Learn the echo reasoning pathway
Review how valve severity, LV function, filling pressures, and intraoperative TEE findings connect in perioperative echo assessment.