Left Ventricular Noncompaction Masquerading as Hypertrophic Nonobstructive Cardiomyopathy

A 61-year-old male with no significant medical history presented with dyspnea on exertion for the past 3 months. Clinical examination findings and electrocardiogram showed sinus rhythm and left ventricular hypertrophy. The chest X-ray and basic laboratory tests were within the normal limits. A transthoracic echocardiogram was performed which showed left ventricular wall thickening involving the anterior wall, lateral wall, septum, and inferior wall in the basal, mid, and apical segments. The left ventricular apex showed disproportionately increased thickness. There was no left ventricular outflow tract (LVOT) turbulence or obstruction. Left ventricular angiogram showed prominent trabeculations with deep intertrabecular recesses. LVOT obstruction was ruled out. The patient then underwent cardiac magnetic resonance imaging, which showed features suggestive of left ventricular noncompaction.