title: Evaluation of the Melody transcatheter pulmonary valve and Ensemble delivery system for the treatment of dysfunctional right ventricle to pulmonary artery conduits.
abstract: Synthetic conduits and bioprosthetic valves are used in the treatment of patients with congenital heart disease involving the right ventricular outflow tract and pulmonary valve. In-situ time-dependent degradation uniformly results in conduit and valve dysfunction. The abnormal hemodynamics imposed by valve and conduit dysfunction have been linked to exercise intolerance, arrhythmia, right heart failure, and sudden death. Starting in childhood, affected patients are subjected to repeated open-heart surgeries to restore valve function and potentially reduce morbidity and mortality. Percutaneous transcatheter pulmonary valve replacement with the Melody Transcatheter Pulmonary Valve (Medtronic, Inc., Minneapolis, MN) has been performed in ≈8000 patients worldwide. The valve and implant procedure provide a far less invasive means of restoring valve and conduit function and allow patients to forego multiple operations. Recent clinical trials have shown excellent and durable results in terms of valve function, relief of obstruction, and improvement in functional class up to 7 years from implant.
authors.affiliation: a Pediatric Cardiology , Yale School of Medicine , New Haven , CT , USA.
authors.forename: Jeremy
authors.initials: J
authors.lastname: Asnes
authors.affiliation: a Pediatric Cardiology , Yale School of Medicine , New Haven , CT , USA.
authors.forename: William E
authors.initials: WE
authors.lastname: Hellenbrand
mesh_terms: D006328:Cardiac Catheterization; D002986:Clinical Trials as Topic; D019918:Heart Valve Prosthesis Implantation / Q000191:economics / Q000331:legislation & jurisprudence; D006801:Humans; D011183:Postoperative Complications / Q000209:etiology; D011651:Pulmonary Artery / Q000503:physiopathology*; D011664:Pulmonary Valve / Q000503:physiopathology*; D018497:Ventricular Dysfunction, Right / Q000601:surgery*
keywords: Congenital heart disease; Melody valve; percutaneous heart valve; pulmonary valve; tetralogy of Fallot