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The cardiologist is a physician who treats and diagnoses disease and injury of the heart and cardiovascular system. The interventional cardiologist is a physician who performs a variety of invasive tests and procedures to assist in diagnoses of and treatment of cardiac disease. A cardiac or cardio-vascular surgeon can be a cardiologist who specializes in surgical interventions of the heart and vascular system.
Share. Cardiologists are doctors who specialize in diagnosing and treating diseases or conditions of the heart and blood vesselsâthe cardiovascular system. You might also visit a cardiologist so you can learn about your risk factors for heart disease and find out what measures you can take for better heart health.f your cardiologist decides that you need surgery, he or she refers you to a cardiovascular surgeon, who specializes in operations on the heart, lungs, and blood vessels. You remain under the care of your cardiologist even when you are referred to other specialists.