Table S2.

Patient with hypertension misclassified as HCM

Misclassified as HCM	Reclassified (n=13) as hypertension
Female, 88 years	Septum 14 mm, hypertension for several years
Female, born 1932, died 2016	Severe hypertension for several years but no cardiac imaging ever done
Male, 78 years	Concentric hypertrophy 16 mm, uncontrolled hypertension for several years
Female, 77 years	“Minimal hypertrophy” at echocardiography report without specific measurements. Malignant hypertension with systolic blood pressure >220 mmHg at repeated measurements. Never reached controlled hypertension
Female, 77 years	Septal bullae 14.5 mm, hypertension for at least 16 years
Female, 76 years	Minimal hypertrophy and 16 mm localized basal septal hypertrophy. Hypertension for several years and regression of hypertrophy
Male, 76 years	Severe hypertension for several years, partly uncontrolled. No cardiac imaging
Female, born 1941, died 2016	Septum 15–18 mm at different echocardiography examinations and mild aortic stenosis. Overestimation of hypertrophy (18 mm) attributed to inexperienced examiner. Later estimated at 15 mm. History of hypertension for at least 12 years
Female, 72 years	Septum 15–17 mm and concentric hypertrophy. Severe hypertension and repeatedly systolic blood pressure >170 mmHg despite medication (probably not fully compliant)
Male, 72 years	Hypertension. Echocardiography did not show hypertrophy (10 mm)
Female, 64 years	Slight proximal septal hypertrophy, maximum 15–16 mm, on echocardiogram. Uncontrolled hypertension for several years
Female, 48 years	Repeated echocardiograms but septum never >13 mm, no obstruction, no systolic anterior motion. Controlled hypertension of unknown duration
Male, 46 years	Septum 14–15 mm, no obstruction, no systolic anterior motion. Malignant hypertension 240 mmHg, uncontrolled hypertension for several years

Abbreviation: HCM, hypertrophic cardiomyopathy.