An electrophysiologist is a medical doctor who specializes in diagnosing and treating heart rhythm disorders, also known as arrhythmias. They use advanced techniques and technologies to study the electrical activity of the heart, helping to identify issues that may cause irregular heartbeats. These specialists often perform procedures such as catheter ablation to correct abnormal heart rhythms and may implant devices like pacemakers or defibrillators to manage heart conditions. Their expertise is crucial in improving patient outcomes and ensuring heart health through precise interventions and ongoing care.