Cardiology - the subspecialty of Internal Medicine which involves the diagnosis, treatment, and prevention of diseases of the heart and blood vessels. A cardiologist is often asked to evaluate and treat patients with chest discomfort, heart attack, high blood pressure, shortness of breath, congestive heart failure, and irregular heart rhythm.
Not everyone who suffers from heart disease needs a cardiologist. An internist or family practitioner can manage many patients with heart disease, high blood pressure, etc. A cardiologist's skills are most needed in complex cases requiring specialized testing or extensive knowledge of the heart. Heart catheterizations, balloon angioplasty, and pacemaker insertions are performed by the cardiologist.