Abstract 23 Table 2

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

EchocardiographyNDeveloped New SymptomsRequired Medication ChangesCardiac admissions in 2-years
LVOT obstruction141 (7%)3 (21%)0 (0%)
LV systolic dysfunction (EF≤50%)30 (0%)2 (67%)1 (33%)
LV diastolic dysfunction (Grade II-III)20 (0%)1 (50%)1 (50%)
LA diameter ≥45mm123 (25%)4 (33%)0 (0%)
LA area ≥30mm2 123 (25%)4 (33%)0 (%)
Cardiac Magnetic Resonance
Late-gadolinium enhancement173 (18%)4 (24%)0 (0%)