Your physician has scheduled a special examination of your heart. This test is performed after an intravenous catheter is placed. This is used for injection(s) of radioactive tracer that allows a scanner to take images of the heart. This procedure also includes a stress test either performed on a treadmill or if you are unable to walk, a medication will be used which will obtain similar results to that achieved by a treadmill stress. The radioactive tracers are not dyes containing Iodine, they are short-lived isotopes, which decay rapidly and also excrete from the body through the urine and feces. Arrival Time: Please arrive 15 minutes prior to your appointment. **Approximate time for test is 1-2 hours.** **IF YOU ARE PREGNANT OR BREASTFEEDING PLEASE NOTIFY YOUR PHYSICIAN BEFORE SCHEDULING**   Please follow these instructions carefully: You may NOT have anything to eat or drink for at least four (4) hours before the exam. NO coffee, tea, soda, chocolate or any other foods or liquids containing caffeine should be consumed at least twenty-four (24) hours prior to the exam. NO ALCOHOL & SMOKING (i.e. cigars, cigarettes, pipes, chewing tobacco) FROM MIDNIGHT PREVIOUS DAY TO TIME OF THE TEST.   Wear comfortable clothing. These can be loose fitting garment, (T-shirts, Button down shirts, sweats, etc.) DO NOT WEAR ONE-PIECE GARMENTS, since you will be connected to an ECG during the stress part of the exam.   If you are walking on the treadmill, please wear comfortable shoes (rubber-soled running, flat, or walking shoes). DO NOT wear slippers, slides, clogs, or thongs.   Continue to take your medications as prescribes, unless otherwise ordered by your physician. Take your medications with a sip of water.   If you are diabetic, please bring a snack to eat after the exam and insulin should be regulated by physician order. DO NOT TAKE DIABETIC MEDICATIONS THE MORNING OF EXAM, PLEASE BRING MEDICATIONS WITH YOU.   FOLLOWING THE EXAM YOU SHOULD DRINK PLENTY OF FLUID UNLESS RESTRICTED BY YOUR PHYSICIAN. ACTIVITES CAN BE RESUMED AT YOUR NORMAL LEVEL AND YOU MAY EAT ACCORDING TO YOUR DIETARY RESTRICTIONS UNLESS YOU HAVE BEEN INSTRUCTED DIFFERENTLY.   Should you have to cancel your appointment, please notify the scheduling department at 210-804-6000. PLEASE GIVE AT LEAST 24 HR NOTICE AS A SPECIAL MEDICATION IS ORDERED AND CANNOT BE REUSED OR STORED.