Percutaneous Closure of Ostium Secundum Atrial Septal Defect Using the Memopart™ Occlusion Device

Abstract

ABSTRACTBackgroundThe authors report their initial experience with the Memopart™ device (Shanghai Shape Memory Alloy Co Ltd, Shanghai, China) for the occlusion of secundum atrial septal defect (ASD).MethodsThis was a prospective observational study of a series of patients undergoing percutaneous occlusion of ASD with right ventricle volume overload and favorable anatomic characteristics. The procedure was performed by percutaneous femoral approach. The mean follow-up was 10.3±5 months, with clinical and 24-hour echocardiographic evaluations (or before hospital discharge), 1, 3, 6, and 12 months after implantation.ResultsFrom February/2012 to April/2013, 21 patients, 16 females, mean age 33.1±18.7years, were submitted to percutaneous occlusion of an ASD. The average diameter of the defect was 19.04±6.25mm and the device size was 21.42±6.73mm (8 to 34mm). Total occlusion of the defect was observed in all cases before hospital discharge. During follow-up, all patients were asymptomatic and without residual shunt. There was no deaths or any other complications in the series.ConclusionsThe percutaneous closure of ASD using a Memopart™ device is an effective and safe procedure within the limits of this investigation. The device is user-friendly and has a high rate of immediate occlusion, even in large defects