Mitral Stenosis: Severity Criteria and Learning Path
Use MVA as the primary anchor, then interpret mean gradient, PHT, pulmonary pressure, symptoms, and AF in context.
Start with severity criteria
MS Severity Criteria: How to Read MVA, Mean Gradient, and PHT
MVA is the anchor. Mean gradient and PHT help interpret hemodynamics, but they are flow-, rhythm-, and loading-dependent.
PHT in Mitral Stenosis: When to Trust It
PHT is one of the most common MVA measurements, but it is not the most reliable. Understanding the five pitfall conditions tells you when to seek a more direct measurement.
Discordant MS Hemodynamics: Very Severe MVA with Unexpectedly Low Gradient
You measure a MVA of 0.8 cm² by planimetry, but the mean gradient is only 7 mmHg in sinus rhythm with no documented low-flow state. This is not reassuring — it is discordant, and it needs explanation.
Mitral Stenosis Before Noncardiac Surgery: Hemodynamic Considerations
MS severity grade tells you how obstructed the valve is. It does not tell you whether a specific surgical procedure at a specific anesthetic risk is safe. That requires understanding the physiology.
Cases
Severe MS Without a Gradient: How the Tool Classifies It
MVA 1.2 cm² by planimetry in sinus rhythm, no mean gradient obtained. Does absent gradient downgrade reliable severe-range MVA?
PHT-Derived MVA in Atrial Fibrillation: When Confidence Drops
MVA 1.4 cm² measured by PHT in a patient with atrial fibrillation. Does the tool still classify this as severe?
Discordant MS Before Hip Replacement: Very Severe MVA, Unexpectedly Low Gradient
MVA 0.8 cm² by planimetry, mean gradient 7 mmHg, sinus rhythm, no documented low-flow state. Pre-surgical echo for elective hip replacement.
Use the tools