Table 1.
Baseline characteristics of the 124 study patients
| Variable | |
|---|---|
| Demographic data | |
| Age (years), mean and SD (median) | 51 ± 17 (54) |
| Male sex, n (%) | 56 (45) |
| Clinical status | |
| Shortness of breath, n (%) | 120 (97) |
| Syncope, n (%) | 24 (19) |
| NYHA functional class III or IV, n (%) | 97 (78) |
| History of prior myectomy, n (%) | 5 (4) |
| History of prior atrial fibrillation, n (%) | 27 (22) |
| Pre-operative echocardiographic data | |
| Septal LV wall thickness (mm), mean and SD | 23 ± 6 |
| LV end-diastolic cavity dimension (mm), mean and SD | 42 ± 7 |
| Resting LV outflow gradient (mmHg), mean and SD | 95 ± 36 |
| Moderate or severe mitral valve regurgitation, n (%) | 56 (45) |
| Treatment, n (%) | |
| β-Blockers | 102 (82) |
| Calcium antagonists | 12 (10) |
| Diuretics | 48 (39) |
| Amiodarone | 15 (12) |
NYHA, New York Heart Association; LV, left ventricular; SD, standard deviation.