Meet Your Arrhythmia Team

Gan H. Dunnington, MD

Dr. Dunnington is a boardcertified cardiothoracic surgeon, specializing in minimally invasive complex cardiac procedures, such as the Hybrid Maze for atrial fibrillation. Dr. Dunnington received his medical degree from Medical College of Virginia. He completed his residency at Stanford University where he also served as Chief Resident of Surgery. In addition, he also completed a fellowship in cardiothoracic surgery at the University of Virginia.

Prior to joining Adventist Heart Institute and founding the Arrhythmia Center, Dr. Dunnington was an assistant professor at Stanford University and assistant director of cardiothoracic surgery at El Camino Hospital—a Stanford University affiliate.

In treating patients with arrhythmia, Dr. Dunnington performs radiofrequency and cryotherapy ablation techniques. His surgical training allows him to treat patients with certain cancers of the lungs and esophagus as well as complex cardiac operations such as minimally invasive valve repair and replacement.

Armin Kiankhooy, MD

Dr. Armin Kiankhooy is a board-certified cardiothoracic surgeon specializing in the most advanced treatments for heart and lung failure and minimally-invasive surgical treatments for atrial fibrillation such as the Hybrid Maze procedure.

Dr. Kiankhooy completed his general surgery residency at the University of Vermont and a cardiothoracic surgery fellowship at the University of Virginia. He later completed an advanced heart and lung failure fellowship at Cedars-Sinai Medical Center, with a focus on heart and lung transplantation and mechanical circulatory support, including the total artificial heart.

Dr. Kiankhooy most recently treated patients and was a member of the faculty at the Keck School of Medicine of the University of Southern California, where he served as director of MCS/VAD/ECMO and surgery director of wellness. Dr. Kiankhooy is active in research and publishes frequently. He is the recipient of the Etz Chiam Milgrom Award and the Richard J. Hurvitz Excellence in Teaching Award from USC.

Matt Cain, MD

Dr. Matthew Cain, MD, FHRS, is a dedicated board-certified cardiac electrophysiologist committed to improving patients' lives by addressing complex cardiac conditions. With a focus on diagnosing and treating heart rhythm disorders, Dr. Cain offers procedures like pacemaker insertion, cardiac ablation, and defibrillation, alongside medication management. His extensive medical background includes a medical degree from Jefferson Medical College, residency at the University of Chicago, and fellowships in cardiovascular disease and cardiac electrophysiology at the University of Texas Southwestern. Certified by the American Board of Internal Medicine in cardiac disease and electrophysiology, Dr. Cain is also a Fellow of the Heart Rhythm Society (FHRS). Throughout his career, he has shared his expertise as a clinical instructor and medical director, while contributing to peer-reviewed journals and medical conferences. Dr. Cain finds fulfillment in the immediate impact he makes on patients' lives every day.

Peter Chang-Sing, MD, FACC

Dr. Peter Chang-Sing has been in clinical practice in cardiology in Santa Rosa since 1991. He received his B.S. in Biological Sciences and M.S. in Electrical Engineering from Stanford University and was then concurrently enrolled in the M.D. program at Yale Medical School and the PhD program at Harvard Medical School where he also taught. He completed his internship in Internal Medicine at New York University Medical Center and his residency in Internal Medicine and fellowships in Cardiology and Clinical Cardiac Electrophysiology at Cedars-Sinai Medical Center in Los Angeles. He is certified by the American Board of Internal Medicine in Internal Medicine, Cardiovascular Disease and Clinical Cardiac Electrophysiology. He is a Fellow of the American College of Cardiology and a Fellow of the Heart Rhythm Society. He is Chief of Cardiovascular Disease and Cardiac Surgery and Medical Director of the Cardiac Electrophysiology Lab at Santa Rosa Memorial Hospital and St. Helena Hospital.

Dr. Chang-Sing’s practice consists of consultative as well as procedural cardiology, with interests in congestive heart failure, arrhythmia management and coronary artery disease. He has performed close to 5000 Catheter Ablations including over 1000 curative ablations for atrial fibrillation. Dr. Chang-Sing has been involved in over 50 Hybrid Maze procedures for atrial fibrillation. He enjoys spending time with his wife and two children, traveling, hiking, fishing and Stanford football.

Susan Judith Eisenberg, MD

Dr. Susan Eisenberg is a board-certified cardiac electrophysiologist specializing in innovative ablative procedures for arrhythmias. Dr. Eisenberg has nearly three decades of experience and is highly respected by her peers for her skill and collaborative and individualized approach to patient care.

Dr. Eisenberg earned her medical degree from New York Medical College and continued on to do her internship and residency at University of California San Francisco, where she later completed a fellowship. She has published research and presented internationally on atrial fibrillation and cardiac care.

Dr. Eisenberg is board-certified by the American Board of Internal Medicine in clinical cardiac electrophysiology. Before joining the Adventist Heart & Vascular Institute she served as medical director of the John Muir Health Cardiac Rhythm Center.