For cardiac electrophysiology subspecialty care in Chula Vista, Charles Athill, MD, FACC, FHRS serves as President and Executive Director of the San Diego Cardiac Center Medical Group on Medical Center Court, drawing on training at Princeton University, Harvard Medical School, Massachusetts General Hospital, and Cedars-Sinai's electrophysiology fellowship. The electrophysiology program treats complex arrhythmias — including atrial fibrillation, supraventricular tachycardia, and ventricular tachycardia — referred by primary care providers such as Mohammed Elsayed, MD - Oxford Care for patients presenting with palpitations or syncope. Board certification in both cardiovascular disease and clinical cardiac electrophysiology supports catheter ablation procedures, pacemaker and defibrillator implantation, and cardiac resynchronization therapy for heart failure patients with dyssynchronous ventricular contraction. Post-procedural recovery and exercise tolerance rebuilding coordinate with Sports Performance Physical Therapy - Chula Vista for patients transitioning from device implantation to graduated cardiovascular conditioning programs. Ablation procedures utilize 3D electroanatomic mapping systems with intracardiac echocardiography guidance to isolate pulmonary vein triggers and map accessory conduction pathways with sub-millimeter catheter-tip resolution.