After the diagnosis of coronary artery disease, your doctor will recommend tests including coronary angiography, which can determine the condition of the coronary artery lesions. Interventional treatment is called interventional because it opens the narrowed coronary artery from the lumen of the vessel under X-ray without surgical open-heart surgery and without general anesthesia. The patient is fully awake and the artery is punctured with local anesthesia at the femoral or radial artery, after which a cardiac catheter is delivered to the opening of the coronary artery. Currently, percutaneous transluminal coronary angioplasty and intracoronary stenting are commonly used. Interventional treatment is more effective than pharmacological treatment and can provide immediate results; the risks and trauma of surgery are significantly reduced compared to surgical bypass.