James Comazzi, MD, founded Sierra Cardiology in 1983 and has been practicing medicine for 30 years. He grew up in El Sobrante, Calif., and completed medical school, residency and fellowship at Loma Linda University. Dr. Comazzi’s special interests within cardiology are management of pacemakers and implantable defibrillators, treatments for cardiac disease that minimize or eliminate the need for medications, and cardiac disease prevention and extension of lifespan with more healthy years.