Cardiologist is a physician who specializes in the diagnoses and the treatment of heart related diseases and disorders. Cardiologists all over the world are tremendously valued and treasured, as they play a significant role in the healthcare system. Cardiology is perhaps one of the most miraculous inventions in the field of medical science that has saved the lives of millions of people suffering from heart related problems. The field of cardiology originated around 1628, when English physician William Harvey came out with his publication on the anatomy and the physiology of the heart. In 1938, American cardiologist, Robert E. Gross performed the very first heart surgery in the world. Later, in the year 1952, the world’s first successful open-heart surgery was performed by American cardiologist, F. John Lewis. Towards the end of the 20th century, the field was enriched with many innovative and improved diagnostic tools and the treatment opportunities expanded. Today, being a cardiologist is one of the most rewarding, satisfying and prestigious professions in the world. There are several prominent cardiologists all across the globe, who have left indelible mark in the field of medical science and the society as a whole. Here is a list of famous cardiologists with their biographies that include trivia, interesting facts, timeline and life history.