A cardiologist is a doctor who’s an expert in heart and blood vessel diseases. They can treat heart diseases and help keep you from getting heart diseases.
After completing four years of medical school, cardiologists spend three years learning general internal medicine as a resident, plus at least three more years of specialized training after that.
After 10 years of training, a cardiologist can take an American Board of Internal Medicine exam. Even after achieving board certification, cardiologists keep learning for as long as they practice. They must keep up with the latest advances in how to treat patients to provide the best care.