Cardiology refers to the medical scientific field which researches and treats various issues, developments, diseases, and other afflictions within or related to the human heart and, by extension, some of the circulatory systems within the body, too. Some of the afflictions of the heart include the following: cardiac arrest, hypertension, and various forms of cardiomyopathy. This branch of medicine deals with everything from diagnosis to treatment, whether by way of medical procedures or drug or physical therapy, to post-procedure and further check-ups.