text: <unk>  refers to thickening of the heart muscle of the right ventricle.
option_0: Right ventricular hypertrophy
option_1: Left ventricular hypertrophy
option_2: Right atrial enlargement
option_3: Hypertrophic cardiomyopathy anatomic abnormalities
option_4: Aortic stenosis symptoms
option_5: Tricuspid stenosis pathophysiology
option_6: Pulmonary valve stenosis causes
option_7: Aortic regurgitation symptoms