Coronary artery patch augmentation for congenital left coronary ostial stenosis in Williams syndrome

Left coronary ostial stenosis, which is associated with sudden death, occasionally occurs in individuals with Williams syndrome. However, surgical methods that provide reliable long-term revascularization remain unknown among infants and young children with coronary ostial stenosis. We describe the case of an 18-month-old boy with Williams syndrome who presented with cardiogenic shock due to left coronary ostial stenosis. We performed patch augmentation of the left coronary ostium using glutaraldehyde-treated autologous pericardium. At the last follow-up, the patient was well without any adverse events or myocardial ischemia.

Infantile dilated cardiomyopathy due to congenital left main coronary ostial stenosis

Although a rare form of congenital heart disease, anomalies of the coronary arteries can present as heart failure in infants. The most common lesion is an anomalous left coronary artery arising from the pulmonary artery, but other abnormalities can present similarly. This case is an infant who is found to have left coronary ostial stenosis causing dilated cardiomyopathy.

Myocardial ischaemia caused by bilateral coronary ostial stenosis from pseudointimal membranes in a full root freestyle valve: a case report

Background Coronary artery ostial stenosis is a rare but well-known complication to aortic root replacement. The occurrence of this complication in patients with the Medtronic Freestyle bioprosthesis is poorly described. We report a case of late bilateral coronary ostial stenosis due to pseudointimal membranes within a Medtronic Freestyle bioprosthesis, resulting in acute coronary syndrome. Case summary In 2013, a 43-year-old male patient received a Medtronic Freestyle bioprosthesis as a full aortic root implantation due to endocarditis with root abscess. Preoperative coronary angiography was normal. The patient, who had no previous symptoms of coronary ischaemia, presented with severe chest pain and acute coronary syndrome in 2017. Coronary angiography and electrocardiogram-gated contrast-enhanced cardiac computed tomography showed bilateral coronary ostial stenosis. The patient was successfully treated with coronary artery bypass grafting. Intraoperative inspection revealed pseudointimal membranes covering the coronary ostia. Histology showed fibro-intimal thickening with areas of inflamed granulation tissue. Discussion Bilateral coronary ostial stenosis is a severe, potentially life-threatening condition, and a possible complication to implantation of the Medtronic Freestyle bioprosthesis as a full root. The phenomenon may occur late and should be distinguished from arteriosclerotic coronary artery disease.