Cardiology is the medical specialty that focuses on the diagnosis and treatment of diseases and conditions related to the heart and blood vessels. Cardiologists are medical doctors who specialize in this field and are trained to diagnose and treat a wide range of cardiovascular conditions.

Cardiologists use a variety of diagnostic tools and techniques to evaluate the function of the heart and circulatory system. These may include electrocardiograms (ECGs), echocardiograms, stress tests, and cardiac catheterization, among others.

Common cardiovascular conditions that cardiologists diagnose and treat include coronary artery disease, heart failure, arrhythmias, valvular heart disease, and congenital heart defects.