Direct measurement of proximal isovelocity surface area by single-beat three-dimensional color doppler echocardiography in mitral regurgitation: A validation study

1. De Agustín, J.A.
2. Marcos-Alberca, P.
3. Fernandez-Golfin, C.
4. Gonçalves, A.
5. Feltes, G.
6. Nuñez-Gil, I.J.
7. Almeria, C.
8. Rodrigo, J.L.
9. Perez De Isla, L.
10. MacAya, C.
11. Zamorano, J.