The primary purpose of this study is to determine if the information from a CT scan of the heart adds value to the information from the nuclear cardiology study in helping doctors make decisions about their patients medical care. Daniel S. Berman, MD 3974 Cardiac Imaging- CT Coronary Heart Disease 07/31/2008 Name: Johanna Moon Phone: (310) 423-4327 E-mail: MoonJH@cshs.org