Aetiology and mechanism of mitral regurgitation (n=50)
| Functional | 28 (56) |
| Ischaemic | 12 (24) |
| Non-ischaemic | 16 (32) |
| Degenerative | 15 (30) |
| Prolapse/flail posterior leaflet only | 7 (14) |
| Prolapse/flail anterior leaflet only | 3 (6) |
| Bi-leaflet prolapse/flail | 5 (10) |
| Mixed | 7 (14) |
Data are given as absolute numbers and percentages.