Abstract
With new surgical techniques, more and more complex congenital heart defects are treated requiring sometimes right ventricle to pulmonary artery conduit implantation. In order to extend RV to PA conduit lifespan, 15 years ago a valved stent was developed. The implantation technique was progressively standardized to decrease risks of procedural complications. Medium and long-term hemodynamic results of the stent were so good that indications were broadened to native or complex right ventricular outflow tracts. Currently, 2 types of stents are implanted routinely: the Melody valve® (Medtronic, Minneapolis, USA) and the Sapien® valve (Edwards, Lifesciences, Irvine, USA). Other devices are evaluated in trials: thanks to their diabolo shape, implantation is feasible in large outflows tracts. The main source of worries is infective endocarditis. Numerous studies are conducted in order to identify risks factors, prevention and optimal treatment of this complication. In the near future, new devices and new implantation strategies will make this technology available for a larger number of patients.
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