Coronary Artery Disease Effects of Medical Therapy on Outcome Assessment Using Exercise Thallium-201 Single Photon Emission Computed Tomography Imaging Evidence of a Protective Effect of Beta-Blocking Antianginal Medications

METHODS We included 352 patients with coronary heart disease, who had exercise Tl-201 SPECT and coronary angiography, and who were initially treated medically. Survival Cox models were applied in patients for whom classes of antianginal medications taken at exercise SPECT were the same as those prescribed for follow-up (GI; n 5 136), and in patients for whom new classes of antianginal medications, including beta-blockers (GII; n 5 79) or not including beta-blockers (GIII; n 5 113), were added for follow-up.