The doctor will explain the procedure to you and offer you the opportunity to ask any questions that you might have about the procedure. You will be asked to sign a consent form that gives your permission to do the test. Read the form carefully and ask questions if something is not clear. In addition to a complete medical history, your doctor may perform a complete physical examination to ensure you are in good health before undergoing the procedure. You may undergo blood tests or other diagnostic tests. You will be asked to fast for eight hours before the procedure, generally after midnight.If you are pregnant or suspect that you are pregnant, you should notify your doctor. Notify your doctor if you are sensitive to or are allergic to any medications, iodine, latex, tape, or anesthetic agents (local and general). Notify your doctor of all medications (prescription and over-the-counter) and herbal supplements that you are taking. Notify your doctor if you have a history of bleeding disorders or if you are taking any anticoagulant (blood-thinning) medications, aspirin, or other medications that affect blood clotting. It may be necessary for you to stop some of these medications prior to the procedure.Your doctor may request a blood test prior to the procedure to determine how long it takes your blood to clot. Notify your doctor if you have a pacemaker. If you smoke, you should stop smoking as soon as possible prior to the procedure. This may improve your chances for a successful recovery from surgery and benefit your overall health status. Based on your medical condition, your doctor may request other specific preparation.