Alejandro E. Contreras,Alejandro R. Peirone,Ignacio Juaneda, Repair of Ruptured Sinus of Valsalva Aneurysm: Rare Cause of Acute Onset Congestive Heart Failure in Down’s Syndrome Journal of Integrative Cardiology Open Access 2020 2674-2489 http://dx.doi.org/10.31487/j.JICOA.2020.03.10 https://www.sciencerepository.org/repair-of-ruptured-sinus-of-valsalva-aneurysm-rare-cause-of_JICOA-2020-3-110 Abstract: A 20-year-old boy with Down´s syndrome presented to the emergency department with new onset acute heart failure. Right side chest effusion and cardiomegaly was observed on chest x-ray. A mobile aneurysmal sac protruding into the right atrium was detected and a ruptured aneurysm of the right coronary sinus of Valsalva was observed in transthoracic echocardiogram. Cardiac angiography catheterization confirmed the diagnosis. Surgical repair consisting of aneurysm resection and defect closure was performed shortly after with pericardium reinforced suture through the right atrium. The patient was discharged uneventfully.Keywords: Congenital heart disease, Aneurysm, heart failure, congenital heart surgery