Post Marketing Clinical Follow Up Study to Evaluate Efficacy and Safety of the Occlutech PDA Occluder in Patients With Patent Ductus Arteriosus Defects

Inclusion Criteria: * A subject of any age will be eligible for PDA closure if he or she meets the indication and area of application as laid down in the IFU. Including subjects more than 3 kg. Thus, the Occlutech PDA Occluder is intended for the non-surgical occlusion of Patent Ductus Arteriosus (PDA) defects. * Male or female subjects. * Subjects or their parents/guardians understanding the nature of the study and providing their informed consent to participation. * Subjects willing and able to attend the follow-up visits and procedures foreseen by study CIP. Exclusion Criteria: Contraindications as laid down in the IFU: * Silent ductus or serious pulmonary hypertension: * Pulmonary Vascular Resistance (PVR) \> 8 Wood Units * Presence of a known coagulation disorder * Thrombus at the position allocated for the implantation * A vein thrombosis in the blood vessels chosen for the introducing system * An active infection (active endocarditis or other infections causing bacteremia) or history of endocarditis within 3 months from the procedure. * Nitinol intolerance (nickel or titanium) * Contrast medium intolerance * Subjects who have a vascular system (which is used to access the defect) that is too small to admit the required sheath