The purpose of this study is to determine if a particular combination of assessments can predict future clinical outcomes in patients who have had no symptoms of coronary artery disease or other heart disease. The combination of assessments in this study includes medical history and risk factor information, a clinical exam, biochemical tests performed on a blood sample, and a cardiac CT imaging procedure. Daniel S. Berman, MD 3351 Cardiac Imaging- CT Coronary Heart Disease 07/31/2008 Name: Johanna Moon Phone: (310) 423-4327 E-mail: MoonJH@cshs.org