title: Mid-ventricular hypertrophic obstructive cardiomyopathy presenting with acute myocardial infarction.
abstract: Mid-ventricular hypertrophic obstructive cardiomyopathy is a rare type of cardiomyopathy that can be accompanied by apical aneurysm. We report the case of a patient who presented with ventricular fibrillation, ST-segment elevation on electrocardiography, and cardiac-enzyme elevation, in the presence of normal coronary arteries. Echocardiography and magnetic resonance imaging showed an hourglass appearance of the left ventricle with an aneurysm in the apex. Left-heart catheterization and continuous-wave Doppler echocardiography revealed a pressure gradient between the apical and basal chambers of the left ventricle. Impaired coronary artery circulation might play a role in the development of mid-ventricular obstruction in patients with mid-ventricular hypertrophic obstructive cardiomyopathy.
authors.affiliation: Department of Cardiology, Nihon University School of Medicine, Tokyo, Japan. yuichis@med.nihon-u.ac.jp
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Sato
authors.forename: Naoya
authors.initials: N
authors.lastname: Matsumoto
authors.forename: Shinro
authors.initials: S
authors.lastname: Matsuo
authors.forename: Shunichi
authors.initials: S
authors.lastname: Yoda
authors.forename: Satoshi
authors.initials: S
authors.lastname: Kunimoto
authors.forename: Satoshi
authors.initials: S
authors.lastname: Saito
mesh_terms: D006328:Cardiac Catheterization; D002312:Cardiomyopathy, Hypertrophic / Q000150:complications* / Q000175:diagnosis; D017023:Coronary Angiography; D003937:Diagnosis, Differential; D015150:Echocardiography, Doppler; D005500:Follow-Up Studies; D006801:Humans; D019028:Magnetic Resonance Imaging, Cine; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000175:diagnosis / Q000209:etiology*; D012720:Severity of Illness Index; D015899:Tomography, Emission-Computed, Single-Photon; D014694:Ventricular Outflow Obstruction / Q000150:complications* / Q000175:diagnosis