Valve type | Aortic | Mitral | |||
---|---|---|---|---|---|
V max (m/s) | Mean Gradient (MG) (mmHg) | V max (m/s) | Mean Gradient(MG) (mmHg) | Causes of increase MG | |
Mechanical | |||||
Bileaflet (St. Jude) | 2.5 | 12 | 1.6 +/- 0.3 | 4 +/- 1 |
Hyperdynamic Ventricle, Paravalvular leak, Suture déhiscence/abscess |
Tilting disk | 2.6 +/- 0.4 | 14 +/- 5 | 1.6 +/- 0.3 | 3 +/- 2 | |
Ball cage | 3.1 +/- 0.5 | 24 +/- 4 | 1.9 +/- 0.5 | 5 +/- 2 | |
Tissue valves | |||||
Stented | 2.6 +/- 0.4 | 13 +/- 6 | 1.8 +/- 0.2 | 6 +/- 2 | Valve regurgitation, endocarditis, thrombosis |
Non stented | 2.2 +/- 0.4 | 3 (2–20) | 1.5 +/- 0.2 | 4 +/- 2 | |
AO homograft | 1.8 +/- 0.4 | 7 +/- 3 |