Cardiac catheterization is a test to check your heart. This test can include a coronary angiogram, which checks the coronary arteries. A coronary angiogram is used to find out if you have disease in your coronary arteries (atherosclerosis). If you have atherosclerosis, this test can pinpoint the size and location of fat and calcium deposits that are narrowing your coronary arteries. Percutaneous coronary intervention (PCI) is similar to coronary angiogram, but it is used to open up a narrowed coronary artery with special tools. The two common types of PCI are: Angioplasty with or without coronary stents. Results from a coronary angiogram help determine whether treatment with medicines, bypass surgery, or percutaneous coronary intervention (PCI), such as angioplasty, may be effective.