Progressive* | Severe¶ | Very severeΔ | |
Valve area (cm2) | >1.5 | <=1.5 | ≤1 |
Diastolic pressure half-time (ms) | <150 | ≥150 | ≥220 |
Mean gradient◊ (mmHg) | <5 | >5 | >10 |
Pulmonary artery systolic pressure (mmHg) | <30 | >30 | >50 |
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