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The aim of this study was to observe whether our patient selection maximized the benefits of PDA ligation by comparing the outcomes in a surgically ligated group of PDA to a medically closed group.If a hemodynamically significant ductus arteriosus (HSDA) was found to meet both clinical and echocardiographic criteria (stage≥3), as proposed by NcNamara and Hellman, medical treatment was initiated with...
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