Background: Primary stent treatment for acute myocardial infarction (AMI) is presently under evaluation. However, there is still lack of angiographic information regarding the timing of functional recovery.Methods: Since January/94 we have treated 116 patients with AMI by elective stent implantation. From them, we selected for analysis 28 patients who had a serial left-ventricular function studies and a patent artery at follow-up. The mean age was 55 +/- 11 years. The time from onset of symptoms to recanalization was 2.9 +/- 1.7 hours; 13 had an anterior and 15 an inferior myocardial infarction. Coronary angiography and left-ventricular angiogram (30 RAO-projection) were performed in the following conditions: baseline (before treatment), 24-hour (24 h), 1-month (1 m) and 6-month (6 m). Ejection fraction (EF) and regional wall motion analysis were measured in every study.Results: The table summarizes the observed results.Conclusions: Stent revascularization in AMI provides an early functional recovery which continues improving. After 1 month, no further changes were observed.