SWEDEHEART is a Swedish national registry consisting of several sub registries in which patients with acute coronary syndrome are prospectively registered. Patient characteristics, hospital treatments, drug treatments at discharge, and outcome for patients consecutively included and treated at all Swedish coronary care units are collected in this registry.SEPHIA is a sub registry collecting data on secondary prevention and cardiac rehabilitation. Follow-up are registered at six to ten weeks and at 12 to14 months post MI by office visits or phone. Around 80 % of all Swedish acute myocardial infarction (AMI) patients below the age of 75 years are included in this register.