Gregory Marcus is the inaugural holder of the Endowed Professorship in Atrial Fibrillation Research at UC San Francisco, where he is also the director of clinical research for the Division of Cardiology. Clinically, Marcus cares for patients with all forms of heart rhythm disturbances, performing catheter ablation procedures and implanting pacemakers, biventricular devices and defibrillators. He oversees multiple interventional and observational industry and federally funded research studies and regularly mentors medical students and fellows in their research. Marcus’ research broadly focuses on patient-centered investigation, including the effects of cultural influences (such as alcohol intake or smartphone screen time) and cardiovascular disease, understanding the mechanisms responsible for common heart rhythm disturbances, and identifying optimal methods to translate the best evidence into clinical practice. Finally, he helps to lead the new NIH-funded Eureka research platform, a digital infrastructure built to facilitate mobile-health research for investigators around the world. Marcus earned his medical degree from George Washington University School of Medicine and Health Sciences in Washington, D.C., completed his internal medicine residency and chief residency at Stanford University Medical Center, then completed cardiology and cardiac electrophysiology fellowships and a master’s degree in clinical research at UCSF.