Pat Rattanawong, MD, FACC, FHRS, is a cardiac electrophysiologist based in Hawai‘i, specializing in complex arrhythmia management, advanced ablation, and physiologic pacing. He trained at the Faculty of Medicine Ramathibodi Hospital, Mahidol University in Thailand, followed by cardiovascular medicine at Mayo Clinic Arizona, where he served as Assistant Professor of Medicine during training, and clinical cardiac electrophysiology at Massachusetts General Hospital, Harvard Medical School. At Pali Momi Medical Center within Hawai‘i Pacific Health, he leads the state’s only fully zero-fluoroscopy ablation program, eliminating radiation exposure while maintaining high procedural success. His clinical focus includes atrial fibrillation, ventricular tachycardia, and inherited arrhythmia syndromes such as Brugada syndrome. He has performed multiple first-in-state procedures and is an early adopter of pulsed field ablation. Dr. Rattanawong also runs a high-volume physiologic pacing program, emphasizing conduction system pacing strategies that preserve natural cardiac activation. His research centers on arrhythmia risk stratification and Brugada syndrome, with contributions to multicenter studies and leading journals. He combines clinical innovation, research, and systems-based thinking to advance electrophysiology care in Hawai‘i and beyond.