Cardiology is a branch of medicine that deals with the diagnosis and treatment of diseases and conditions related to the heart and blood vessels. It focuses on understanding how the heart functions, identifying abnormalities in heart rhythms, and managing conditions such as coronary artery disease, heart failure, arrhythmias, hypertension, and congenital heart defects. Cardiologists use a variety of diagnostic tools, including electrocardiograms (ECG), echocardiograms, stress tests, and cardiac catheterization to assess heart health and determine appropriate treatments. They may recommend lifestyle changes, medications, or procedures like angioplasty or pacemaker implantation to manage heart conditions. With heart disease being a leading cause of death worldwide, cardiology plays a critical role in promoting cardiovascular health and improving patient outcomes.