Brian Chesnie, MD, is a Harvard-trained cardiologist with more than 20 years of experience. He studied under Dr. Bernard Lown, a Nobel Peace Prize laureate who is one of the most renowned cardiologists in the nation and who invented defibrillation and cardioversion, now principal lifesaving techniques used in medicine every day. Dr. Chesnie was one of the earliest investigators into implantable cardioverter defibrillators (ICD) and performed Orange County’s first ICD implantation. He introduced and developed cardiac electrophysiology programs at five Orange County hospitals, including Hoag Memorial Hospital. He is currently the Chairman of Cardiology and former Director of Electrophysiology and Pacemaker Arrhythmia Center at Hoag Hospital. Dr. Chesnie is one of only a handful of doctors in Orange County who is board certified in Lipidology. He also performed Hoag’s first catheter ablation procedure as well as its first implantation of a biventricular pacemaker. In addition, he cares for many area physicians who trust his experience, expertise and reputation for medical excellence.