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A large patent ductus arteriosus in a patient with a giant pulmonary artery and congenital single coronary artery is a rare congenital cardiovascular malformation. In this report, we present images and videos of the percutaneous closure of an unusually large patent ductus arteriosus in a 33-year-old man with high pulmonary artery pressure. A 33-year-old man was diagnosed with a patent ductus arteriosus (PDA) shortly after birth, but was then lost to follow-up. He had no symptoms and received no medical treatment until he presented with a one-month history of progressive dyspnea and palpitations. On physical examination he had a prominent left ventricular impulse with a loud continuous murmur. There was no evidence of cyanosis, clubbing, or peripheral edema. His chest X-ray showed cardiomegaly and enlargement of the left pulmonary hilum, and an electrocardiogram revealed sinus tachycardia with incomplete right bundle branch block (Figure 1A). A transthoracic echocardiogram revealed a PDA with left-toright shunt (pulmonary/systemic flow [Qp/Qs] ratio of 1.6), left ventricular ejection fraction of 60% and enlargement of the right heart chambers and the left pulmonary artery,

Percutaneous closure of an unusually large patent ductus arteriosus in a patient with a giant pulmonary artery and congenital single coronary artery