Dr. Hahn is Professor of Medicine at Columbia University Irving Medical Center, Chief Scientific Officer of the Echo Core Lab at the Cardiovascular Research Foundation and Director of Interventional Echocardiography at the Columbia Structural Heart and Valve Center. Dr. Hahn attended Washington University School of Medicine in St. Louis and completed her residency in internal medicine, fellowship in cardiology, and research fellowship in cardiology at NewYork-Presbyterian Hospital/Weill Cornell Medical Center.

She is an active member of the American Society of Echocardiography as well as the American College of Cardiology (member of the Competency Management Committee, past Scientific Sessions Planning Committee/Valvular Heart Disease Topic Coordinator). She has published over 250 articles on Echocardiography and Valvular Heart Disease. She has co-authored the following American Society of Echocardiography recommendations/guidelines: "Guidelines for Performing a Comprehensive Transesophageal Echocardiographic Examination"; "Recommendations for Noninvasive Evaluation of Native Valvular Regurgitation"; "Guidelines for the Evaluation of Valvular Regurgitation After Percutaneous Valve Repair or Replacement" and "Guidelines for the Use of Transesophageal Echocardiography to Assist with Surgical Decision-Making in the Operating Room"; and "Recommended Standards for the Performance of Transesophageal Echocardiographic Screening for Structural Heart Intervention".

Dr. Hahn participates on the following Academic Research Consortium writing committees: Valve Academic Research Consortium (VARC-3), Paravalvular Leak Academic Research Consortium, Mitral Valve Academic Research Consortium and Tricuspid Valve Academic Research Consortium. She was National PI for the SCOUT Trial and is the National Co-PI for the Triscend Pivotal Trial.