Chronic mitral regurgitation: integrated severity

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Chronic mitral regurgitation: integrated severity

Version 2026.10.1

Counts the specific criteria for mild and for severe (≥4 of 6 each), then quantifies intermediate cases (EROA, RVol, RF; Grade I–IV) only with measurements valid for the study. Contradictory, unreliable or insufficient data give an indeterminate or incomplete result, never a grade.

Quick reference:↑ Mitral regurgitation

Flowchart:

Applicability

Native valve with chronic MR. Prosthetic and repaired valves, and acute regurgitation, are outside the algorithm.
MR is graded by integrating specific signs and measurements; no single parameter produces a grade. Poor image quality or discordant parameters give an indeterminate result.
Quantitative parameters are used only when valid for the study (holosystolic timing, jet geometry, no shunt or second regurgitant valve for stroke-volume methods, hemispheric PISA).

Scope of the algorithm
Is this a native valve with chronic MR?
Valve — The grading tables and algorithm are for native valvesTime course
State whether the valve is native and the regurgitation chronic.