title: Obstruction of the right pulmonary artery by an aortic aneurysm complicating previous coronary bypass grafting.
abstract: We report a case of right main pulmonary artery compression due to a type II dissecting aortic aneurysm simulating massive pulmonary artery embolism. Aortic tear and intimal splitting developed around an aortocoronary bypass graft performed 11 months earlier. Ultrasound detected the aortic aneurysm and pulmonary hypertension, and excluded emboli in the pulmonary artery. Pulmonary angiography explained the lung involvement, showing compression of the right main pulmonary artery. Coronary and aortic angiograms demonstrated that the aortic aneurysm developed around the right venous bypass graft. Surgery confirmed the angiographic findings and the pathogenesis of the syndrome.
authors.affiliation: Istituto di Cardiologia dell'Universita degli Studi di Milano, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Guazzi
authors.forename: F
authors.initials: F
authors.lastname: Bortone
authors.forename: N
authors.initials: N
authors.lastname: De Cesare
authors.forename: M
authors.initials: M
authors.lastname: Pepi
authors.forename: P
authors.initials: P
authors.lastname: Moruzzi
mesh_terms: D000784:Aortic Dissection / Q000150:complications* / Q000000981:diagnostic imaging; D001014:Aortic Aneurysm / Q000150:complications* / Q000000981:diagnostic imaging; D001157:Arterial Occlusive Diseases / Q000209:etiology*; D001026:Coronary Artery Bypass / Q000009:adverse effects*; D017548:Echocardiography, Transesophageal; D006801:Humans; D008297:Male; D008875:Middle Aged; D011651:Pulmonary Artery / Q000000981:diagnostic imaging; D011859:Radiography; D012501:Saphenous Vein / Q000637:transplantation