text: There are several scoring systems which have been devised as methods of identifying high-risk patients presenting with acute coronary syndrome (ACS). These include, among others, the Braunwald classification system, the Rizik classification system, the TIMI<unk>  score, the GRACE<unk>  score, and the PURSUIT<unk>  score.
option_0: Unstable angina / non ST elevation myocardial infarction risk stratification and prognosis
option_1: Chronic stable angina risk stratification coronary angiography
option_2: Unstable angina / non ST elevation myocardial infarction long-term medical therapy and secondary prevention ACC/AHA guidelines quality care and outcomes
option_3: Chronic stable angina risk stratification electrocardiogram/chest x-ray
option_4: Unstable angina / non ST elevation myocardial infarction long-term medical therapy and secondary prevention
option_5: Unstable angina / non ST elevation myocardial infarction long-term medical therapy and secondary prevention ACC/AHA guidelines depression
option_6: Chronic stable angina risk assessment in patients with an intermediate or high probability of coronary artery disease
option_7: Unstable angina / non ST elevation myocardial infarction initial conservative versus initial invasive strategies