A heart specialist, also known as a cardiologist, is a medical doctor who focuses on diagnosing and treating conditions related to the heart and blood vessels. They manage diseases such as coronary artery disease, heart failure, and arrhythmias. Cardiologists often perform tests like echocardiograms and stress tests to assess heart health. In addition to treating existing heart conditions, heart specialists also emphasize prevention. They provide guidance on lifestyle changes, such as diet and exercise, to reduce the risk of heart disease. Some cardiologists may further specialize in areas like interventional cardiology or electrophysiology for more specific treatments.