RENASICA II is a prospective registry that included 8,098 patients with final diagnosis of acute coronary syndromes. Three thousand five hundred and forty three patients had unstable angina or non-ST elevation myocardial infarction (UA/NSTEMI) and 4,555 ST elevation myocardial infarction. (STEMI) On admission typical chest pain was identified in 78% and 85% respectively. Non-ST elevation high risk group was identified in 36%. In STEMI group anterior myocardial infarction and Killip class I had a higher occurrence. The use of aspirin, unfractionated heparin, low molecular weight heparin, nitrates, beta blockers and ACE inhibitors for patients with UA/NSTEMI were 90%, 50%, 45%, 58%, 50% and 54% respectively, with corresponding rates of 88%, 54%, 44%, 66%, 51% and 64% for STEMI patients.