A Patient with Aortic Arch Aneurysm Perforating the Left Pulmonary Artery.

An aortic arch aneurysm rarely perforates the pulmonary artery, but once this occurs symptoms of heart failure may develop rapidly and result in a serious course. Here, we report such a case that was treated with life-saving emergency surgery. The patient was an 86-year-old man in whom aortic arch aneurysm had been pointed out 8 years earlier, but left untreated. In January 2014, dyspnea developed and he visited the emergency unit of our hospital. Continuous murmur was heard on auscultation, and aorta-pulmonary artery shunt was noted on transthoracic echocardiography. Chest computed tomography revealed a giant aortic arch aneurysm of size 106 mm that had perforated the left pulmonary artery (LPA). Emergency surgery was performed for a diagnosis of acute heart failure associated with perforation of the LPA by a giant aortic arch aneurysm. The postoperative course was favorable, and the patient was discharged with independent walking on postoperative day 28.