Cardiology is the subspecialty of internal medicine concerned with the functioning of the heart, blood vessels and circulation of blood throughout the body. It may also encompass evaluation of the lungs.
Cardiologists prevent, diagnose and treat conditions of the heart, blood vessels and circulation system in adult patients. But as broadly trained internists, they may also perform a general physical check-up. If a condition is found that falls within cardiology, they will handle the treatment. If it requires the services of another physician, they will refer you appropriately.