Contributions Evan M. Zahn, MD, MSCAI SCAI Position Statement on Transcatheter Occlusion of Patent Ductus Arteriosus in Premature Infants Evan M. Zahn, MD, MSCAIHot Topics in Interventional Cardiology (2020) Evan M. Zahn, MD, MSCAIAmplatzer Piccolo Occluder Clinical Trial for Percutaneous Closure of the Patent Ductus Arteriosus in Patients ≥700 Grams Evan M. Zahn, MD, MSCAISCAI/AATS/ACC/STS Operator and Institutional Requirements for Transcatheter Valve Repair and Replacement, Part III: Pulmonic Valve