Hypertrophic cardiomyopathy corresponds to myocardial hypertrophy >15mm or >13mm in case of familial hypertrophic cardiomyopathy (HCM).We report the case of a 31-year-old patient with no cardiovascular risk factors and no notable history who was admitted to the emergency room for the management of prolonged resting chest pain associated with electrical changes in the electrocardiogram (EKG)given the clinical symptomatology and the overshift with the mirror image. A coronary angiography was performed and came back without any particularity. The diagnosis of non-obstructive septal HCM was made based on echocardiography and cardiac magnetic resonance imaging (MRI) findings.The patient stayed in the cardiac intensive care unit with a good clinical course, he was declared to be discharged under symptomatic treatment given the non-obstructive nature and the low risk of sudden death.