The heart’s job is to pump blood throughout the body; it’s one of the most important muscles you have. Naturally, there is a great deal of study that has been done on this organ, with many different types of cardiologists specializing in different aspects of it. Dr. Anne-Marie Feyrer-Melk, from a local practice of Scottsdale cardiologists, has helped explain what the different types of cardiologists are and what each one focuses on. What Is Cardiology