A Cardiologist is an internal medicine doctor that specializes in the cardiovascular system. Cardiologists diagnose and treat patients with heart problems. Job Description. Cardiologists are medical doctors who specialize in areas of the heart and work closely with the cardiovascular system.What are the types of cardiologist?
Cardiologists are doctors who specialize in treating illnesses and conditions that affect the heart. The heart is an intricate and vital organ, and cardiologists need years of training, plus further specialization. The four types of cardiologists are non-invasive, non-interventional, interventional and electrophysiology.