Cardiac catheterization involves inserting a thin, flexible tube (catheter) into a blood vessel, usually in the groin or arm, and threading it towards the heart. This procedure allows for detailed examination of the heart's blood vessels, chambers, and valves. It helps diagnose conditions like coronary artery disease, congenital heart defects, and valve issues. Additionally, it enables interventions like angioplasty or stent placement to open narrowed arteries, improving blood flow. Cardiac catheterization is a vital tool for the diagnosis and treatment of heart while enabling minimally invasive procedures to address cardiac issues.