Table 1.

Summary of imaging findings in HCM.

Diagnostic Criteria	Ancillary Signs	Prognostic Markers
Maximal wall thickness >15 mm (>13 mm in relatives of HCM patients)	Papillary muscle abnormalities	Maximal wall thickness (>30 mm)
Asymmetric septal hypertrophy (ratio septal/posterior wall thickness >1.3 or >1.5 in hypertensive patients)	Mitral valve and subvalvular structure abnormalities	Left atrial size (anteroposterior diameter)
	Myocardial clefts/crypts	Maximum LVOT gradient (at rest or induced by exercise)
	Aneurysms	LVEF < 50%
		Abnormal GLS
		Presence, extension, and progression of LGE
		Increased T1/ECV values