Nelson B. Schiller, M.D., FACC, professor of medicine and the John J. Sampson and Lucy Stearn Endowed Chair of Cardiology, University of California San Francisco (UCSF) and founder the Adult Echocardiography Laboratory and Adult Congenital Heart Disease Clinic at UCSF, explains the how he uses a digital stethoscope to improve the quality of his care. He said the digital stethoscope can record heart sounds more accurately and filter out ambient noise to improve diagnostics.