Abstract
Coronary allograft vasculopathy (CAV) is the most significant cause of morbidity and mortality in heart transplant recipients. Inflammation and endothelial dysfunction caused by graft rejection and viral infections leads to a combination of circumferential intimal fibromuscular hyperplasia, atherosclerosis, and inflammation affecting all layers of the vessel wall. Though obstructive CAV is often asymptomatic, posing a diagnostic challenge in post-transplant patients, early diagnosis and treatment aid faster recovery and improved outcomes. The role of percutaneous coronary intervention in the treatment of CAV is unknown and not well studied in the pediatric population. We present a first-in-human case of ostial left main coronary artery disease managed with flaring of the ostial coronary stent using a Flash ostial balloon in a pediatric patient with history of an orthotopic heart transplant.
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