Transcatheter Closure of Patent Ductus Arteriosus: Initial Study on Echocardiographic Estimation of Device Size - Hajizeinali, Alimohammad; Sadeghian, Hakimeh; Rezvanfard, Mehrnaz; Alidoosti, Mohammad; Kassaian, Seyed Ebrahim; Nematipour, Ebrahim (The Research in Heart Yield and Translational Medicine (RHYTHM))