Electrophysiologists are those Cardiologists who gain expertise in treatment of arrhythmias like atrial fibrillation, Supraventricular tachycardia, Premature beats with medicines and catheter based procedures like ablation. They also implant devices like pacemakers and defibrillators to treat slow heart rate, cardiac arrest.

A cardiac surgeon is a medical professional who is experienced and skilled in treating heart problems, disorders, diseases, and conditions. They can diagnose certain heart problems and treat them with surgery. They work closely with other medical professionals, such as primary care doctors and cardiologists. Cardiac surgeons often perform surgeries to correct heart problems and heart disease, but they can also work on other areas in the chest.