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MS numbers
Mitral stenosis measurements
Technique/severity | Value range (with units) |
---|---|
Pressure half time (P ½ T) normal: | 30-60 milliseconds |
Pressure half time (P ½ T) mild MS: | 90-150 msec |
Pressure half time (P ½ T) moderate MS: | 150-219 msec |
Pressure half time (P ½ T) severe MS: | 220 msec or longer |
Mitral valve area (MVA) normal: | 2.5-4 cm2 |
Mitral valve area (MVA) mild MS: | 1.5-2.5 cm2 |
Mitral valve area (MVA) moderate MS: | 1.0-1.5 cm2 |
Mitral valve area (MVA) severe MS: | <1.0 cm2 |
Mean gradient findings: mild MS: | <5 mmHg |
Mean gradient findings: moderate MS: | 5-12 mmHg |
Mean gradient findings: severe MS: | >12 mmHg |