Coronary angiography is a diagnostic procedure used to visualize the coronary arteries and evaluate their condition. It involves the insertion of a thin catheter into a blood vessel, usually through the wrist or groin, and advancing it to the heart. A contrast dye is then injected through the catheter, which helps highlight the blood vessels on X-ray images called angiograms. These images provide detailed information about any blockages, narrowings, or abnormalities in the coronary arteries, helping doctors determine the appropriate course of treatment, such as angioplasty or bypass surgery, to restore blood flow and improve heart health. Coronary angiography is a vital tool in diagnosing and managing coronary artery disease, guiding interventions and decisions for patients' cardiac care.