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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.
A cardiologist must typically complete a three year residency program in internal medicine, and then obtain a fellowship in cardiology; this stage will take an additional two to three years to complete.187,199. Cardiologists may expect to work long hours, often over 40 hours per week, as people suffer serious heart incidents at any time, necessitating emergency calls to render care to patients.