Hypertrophic cardiomyopathy (HCM) is the most common form of genetic heart disease, with an incidence of 1: 500 individuals in the general population, being the most frequent cause of sudden death in athletes and young adults in the United States1,2. Cardiac magnetic resonance imaging (CMRI) is a noninvasive imaging method that allows the accurate identification of various forms of hypertrophy, quantification of ventricular volume and mass and characterization of myocardial fibrosis through the late enhancement technique3. The presence of myocardial fibrosis in CMRI is associated with the risk of sudden death, ventricular tachycardia and systolic dysfunction4. The presence of late enhancement is the strongest predictor of worse prognosis, even after adjustment for other factors such as maximum thickness and myocardial mass, obstruction of the LV outflow tract and clinical variable5,6. The purpose of this study is to report the case of a patient with HCM, asymptomatic, with extensive/exuberant myocardial fibrosis detected by CMRI and to discuss a potential therapeutic implication.