Tell your doctor about any medicines you are taking. It's important for your doctor to know if you are taking any blood-thinning medicines or have a bleeding disorder. Also, tell your doctor if you have a pacemaker, are pregnant or breastfeeding, are allergic to or have intolerances to any medicines. Before the procedure begins, you will be asked to sign an informed consent form. An IV (intravenous) line may be put into a vein in your hand or arm. This line supplies fluids and medicines. To keep you free of pain during the procedure, you may be given anesthesia. Depending on the type of anesthesia used, you may be awake, drowsy, or in a deep sleep for the procedure.