As with all procedures, angiography involves risks and potential complications. Complications may become serious and life threatening in some cases. Complications of angiography are uncommon but can occur during the procedure or recovery. Risks and potential complications of angiography include: Adverse reaction or problems related to sedation or contrast agents, such as an allergic reaction and problems with breathing Bleeding or clotting problems Damage to the artery from the catheter Exposure to radiation, which may be harmful in excessive doses Infection Injury from metal objects in or on your body or in the room during an MRI Kidney injury from the contrast agent, especially if you have kidney disease Reducing your risk of complications You can reduce your risk of some complications by following your treatment plan and: Following activity, dietary and lifestyle restrictions and recommendations before your procedure and during recovery Informing your doctor and care team if you have any metal in your body. This includes screws, pins, plates, pacemakers, implants, intrauterine devices (IUDs), or bullet fragments. Informing your doctor if you are nursing or there is any possibility of pregnancy Notifying your doctor right away of any concerns, such as bleeding, fever, or increase in pain Removing all jewelry and metal objects and leaving them outside the MRI room. This includes glasses, credits cards, hair accessories, and removable dental work. Taking your medications exactly as directed Telling all members of your care team if you have any allergies Telling your doctor if you have kidney disease or diabetes