A Doctor Who typically deals with caring for the heart and its related diseases is known as a cardiologist. This process can be difficult because it requires several years of education and training. Used in the British medical education system, the term consultant cardiologist has been modeled to reference to a senior cardiologist who would be in charge. This would typically either be a Member or a Fellow of the Royal Colleges of Physicians, or the MCRP / FRCP.Becoming a doctor of any field in the United States require that you have an undergraduate degree, and this is no different. However, it does not necessarily need to be a science degree. So long as a student has taken required premed courses in math, Biology, chemistry and physics, a medical school will prefer a well-rounded student.