Screening Evaluation for Hypertrophic Cardiomyopathy
Shamar is a 15-year-old African-American teenager who is active in basketball with his high school basketball team. Recently, his father was diagnosed with nonobstructive hypertrophic cardiomyopathy (HCM). Shamar is having a screening evaluation with an HCM specialist in his area. He denies shortness of breath, chest pain, presyncope, or syncope. An electrocardiogram (ECG) is recorded (Figure 1).
His echocardiogram shows maximal wall thickness 12 mm with prominent trabeculations at the apex. There is no systolic anterior motion of the mitral valve leaflets.
Based on these results, he is sent for a cardiac magnetic resonance imaging, which shows moderate biventricular enlargement with normal biventricular systolic function associated with athletic training. There are no areas of focal hyperenhancement, consistent with the absence of scarring. There is no left ventricular hypertrophy, with maximal end-diastolic width 11 mm.
Which one of the following is correct regarding screening evaluations for those with a family history of HCM?