Mild (1+) | Moderate (2+) | Severe (3 to 4+) | |
Jet size (percent left atrium) | <20% | 20 to 40% | >40% for a central jet or variable size for an eccentric wall-impinging jet |
Jet duration | Often brief (ie, mid-late systolic jet) | Variable (includes late systolic eccentric jet) | Holosystolic jet |
Vena contracta (mm) | <3 | 3 to 6.9 | ≥7 |
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