The number of follow-up HCM patients who developed new symptoms or required medication changes and their respective echocardiography and cardiac magnetic resonance assessments. EF, ejection fraction; LA, Left atrium; LVOT, left ventricular outflow tract
| Echocardiography | N | Developed New Symptoms | Required Medication Changes | Cardiac admissions in 2-years |
|---|---|---|---|---|
| LVOT obstruction | 14 | 1 (7%) | 3 (21%) | 0 (0%) |
| LV systolic dysfunction (EF≤50%) | 3 | 0 (0%) | 2 (67%) | 1 (33%) |
| LV diastolic dysfunction (Grade II-III) | 2 | 0 (0%) | 1 (50%) | 1 (50%) |
| LA diameter ≥45mm | 12 | 3 (25%) | 4 (33%) | 0 (0%) |
| LA area ≥30mm2 | 12 | 3 (25%) | 4 (33%) | 0 (%) |
| Cardiac Magnetic Resonance | ||||
| Late-gadolinium enhancement | 17 | 3 (18%) | 4 (24%) | 0 (0%) |