title: Idiopathic right atrial enlargement.
abstract: A 26-year-old man presented with lower extremity edema and abdominal protrusion associated with dyspnea for 5 years, which had increased 7 months earlier. Echocardiography demonstrated a huge right atrium of 19.5 × 15.2 cm with a thick smoke pattern and severe tricuspid regurgitation. Magnetic resonance imaging confirmed intact pericardium. A pulmonary perfusion scan demonstrated multiple perfusion defects, suggesting recurrent small pulmonary emboli. Idiopathic enlargement of the right atrium was diagnosed. The patient declined surgery.
authors.affiliation: Cardiology Department, Shiraz University of Medical Sciences, Shiraz, Iran.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Ostovan
authors.forename: Shahab
authors.initials: S
authors.lastname: Shahrzad
authors.forename: Samira
authors.initials: S
authors.lastname: Taban
authors.forename: Alireza
authors.initials: A
authors.lastname: Moniri
mesh_terms: D000284:Administration, Oral; D000328:Adult; D000925:Anticoagulants / Q000008:administration & dosage; D001145:Arrhythmias, Cardiac / Q000175:diagnosis / Q000209:etiology; D006332:Cardiomegaly / Q000175:diagnosis / Q000209:etiology* / Q000628:therapy; D006325:Heart Atria / Q000000981:diagnostic imaging; D006801:Humans; D006976:Hypertension, Pulmonary / Q000175:diagnosis / Q000209:etiology; D008297:Male; D011655:Pulmonary Embolism / Q000175:diagnosis / Q000209:etiology; D036542:Tomography, Spiral Computed; D016312:Treatment Refusal; D014262:Tricuspid Valve Insufficiency / Q000175:diagnosis / Q000209:etiology; D014463:Ultrasonography
chemical_list: D000925:Anticoagulants
keywords: Cardiomegaly; dilatation; heart atria; pathologic; tricuspid valve insufficiency