Stress Thallium and Persantine
These exams are to evaluate the ability for the heart to get its blood supply through the coronary arteries. This is an indirect testing method, whereas a cardiac catheterization is a direct testing method. Often, your physician will order this test if a blockage is suspected to see if you need the more invasive cardiac catheterization. You will be asked to walk on a treadmill to stress the heart or, if you are unable to walk for some reason, you will have your heart stressed chemically with the drug Persantine (Dipyridamole).
Your physician or the cardiologist will monitor the stress part of your test, checking the EKG constantly for any problems. When you achieve your maximum predicted heart rate, the nuclear medicine technologist will inject an isotope, which will locate in the heart muscle. You will then be taken to nuclear medicine to do images of the stressed heart. You will return 3 to 4 hours later to have a second set of images taken when the heart is at rest. The images of your heart will be sent to a cardiologist at Atlanta Cardiology for interpretation. The report will be available to your physician within 3-4 working days.
Stress Thallium- Do not eat or drink anything after midnight on the morning of the exam. Do not take your morning oral medications until after the stress part of the exam. Wear comfortable clothes and shoes for walking on the treadmill.
Persantine Stressed Thallium- Do not have any beverages containing caffeine or any chocolate for 24 hours prior to the exam. Also, check with your physician if you are on any medications for your lungs, which contain theophylline as these interfere with the action of the Persantine. Do not eat or drink anything after midnight on the morning of the exam. Do not take your morning oral medications until after the stress part of the exam.