NOTE: ADDED JULY, 2010: To assure accuracy with respect to comparison of the SACS score to other ACS Risk Stratification scoring tools, we will only include patients in our study whose medical records reflect accurate risk factor history assessments which are consistent with TIMI risk factor assessment guidelines. For example, if it is recorded that the patient has "Family History Positive for Coronary Artery Disease," but it does not state specifically WHICH family member(s), and/or does not state the SPECIFIC CARDIAC DIAGNOSIS (such as "Acute Myocardial Infarction"), and/or does not include the AGE of the family member at the time of diagnosis, we WILL NOT include the patient in our study. A complete list of TIMI Risk Factor Assessment Guidelines TIMI guidelines can be found at www.TIMI.org,