Dr. Preston is Assistant Professor of Medicine at the Tufts University School of Medicine and is the Co-Director for the Pulmonary Hypertension Center at Tufts Medical Center in Boston, MA. Her current areas of research interest include mechanisms of pulmonary hypertension. She has participated in numerous clinical trials for pulmonary hypertension, many of which tested various therapies, such as prostacyclin analogues, endothelin receptor antagonists, and phosphodiesterase 5 inhibitors. She is a member of the American College of Chest Physicians and the American Thoracic Society.