Echocardiographic images of a child with hypertrophic cardiomyopathy (HCM)

2D TTE images from a 4-year-old patient with HCM showing marked asymmetric septal hypertrophy as seen on parasternal long view (panel A), parasternal short view (panel B), and apical 4-chamber view (panel C). This patient has a documented disease-causing mutation in the gene MYBP3.