In acute myocardial infarction cardiovascular magnetic resonance imaging can retrospectively detect the myocardium at risk and the irreversible injury. This allows for quantifying the extent of salvaged myocardium after reperfusion as a potential strong end point for clinical trials and outcome. The aim of the present study is to determine the prognostic significance and determinants of myocardial salvage assessed by CMR in reperfused ST-elevation myocardial infarction (STEMI).