Confused about which test is best to detect heart blockage? Dr. Rakesh explains the key differences between CT coronary angiography and catheter angiography. CT coronary angiography is a non-invasive test that uses advanced imaging to create detailed 3D pictures of your heart’s arteries without inserting any tubes. It is quick, safe, and ideal for people with low to moderate risk or unclear symptoms. On the other hand, catheter angiography is an invasive procedure where a thin tube is inserted i