| Baseline criteria | Group I: Vmax <50 ml (n = 29) | Group II: Vmax 50–70 ml (n = 15) | Group III: Vmax >70 ml (n = 26) |
| Age (years), mean (SD) | 40.2 (7.5) | 44.8 (8.5) | 46.2 (9.5) |
| Male gender (%) | 17 (59) | 10 (67) | 19 (73) |
| Clinical diagnosis (%) | |||
| Normal | 19 (66) | 0 (0) | 0 (0) |
| Hypertension | 7 (24) | 10 (67) | 3 (12) |
| Coronary disease | 3 (10) | 5 (33) | 8 (31) |
| Non-compaction CM | 0 (0) | 0 (0) | 15 (58) |
| Mitral regurgitation (%) | |||
| None | 25 (86) | 10 (67) | 16 (62) |
| Mild (grade 1) | 4 (14) | 5 (33) | 10 (38) |
CM, cardiomyopathy.