Study group characteristics (n=392)
| Variable | |
| Demographics | |
| Age, years, mean±SD (range) | 53±14 (18–79) |
| ≤30 (women/men), n | 6/19 |
| 30–40 (women/men), n | 9/33 |
| ≥40 (women/men), n | 99/226 |
| Men, n (%) | 278 (71) |
| Medical history | |
| Time since diagnosis of HCM, years, mean±SD (range) | 8±9 (0–46) |
| History of hypertension | 136 (34) |
| Duration of hypertension, years, mean±SD (range) | 12±10 (0–45) |
| Family history of HCM | 102 (26) |
| Family history of sudden death | 71 (18) |
| Symptoms | |
| NYHA class | |
| I | 118 (30) |
| II | 187 (47) |
| III | 82 (21) |
| IV | 7 (2) |
| (Pre)syncope | 108 (27) |
| Angina pectoris | 108 (27) |
| Atrial arrhythmias | 115 (29) |
| Ventricular arrhythmias | 43 (11) |
| No symptoms | 64 (16) |
| Echocardiography | |
| Maximum left ventricular wall thickness, mm, mean±SD (range) | 20±5 (15–40) |
| Left ventricular wall thickness ≥30 mm | 21 (5) |
| Left ventricular outflow tract gradient ≥30 mm Hg | 121 (31) |
Results are shown as number (%) unless stated otherwise.
HCM, hypertrophic cardiomyopathy; NYHA New York Heart Association.