A cardiologist is a medical doctor who specializes in the study, diagnosis, and treatment of disorders of the cardiovascular system, which includes the heart, arteries, and veins. They have extra education and training in preventing, diagnosing, and treating heart conditions. Cardiologists can treat chest pain, high blood pressure, heart failure, heart rhythm disorders, coronary artery disease, heart attacks, heart defects and infections, and related disorders. They can order tests like electrocardiograms, echocardiograms, and CTs to find out what’s wrong and prescribe medicine, recommend lifestyle changes such as diet, exercise, reducing stress levels, and managing weight. Cardiologists can perform procedures such as implanting a pacemaker or inserting a cardiac catheter. They can also educate habits that promote heart health. Cardiologists can work in hospitals as well as private practices. The training to become a cardiologist is rigorous and includes more than 10 years of medical training. There are different types of cardiologists, including clinical cardiologists, heart failure specialists, interventional cardiologists, cardio-oncologists, congenital heart specialists, cardiac imaging specialists, peripheral interventional cardiologists, preventive cardiologists, cardiac rehabilitation specialists, electrophysiologists, and geriatric cardiologists.