Relations between ST-segment resolution and lately prognosis in patients with acute myocardial infarction and treated by primary percutaneous coronary intervention

Objective To study the relations between ST-segment resolution and lately prognosis in patients with acute myocardial infarction(AMI) and treated by primary percutaneous coronary intervention(PCI).Methods The electrocardiogram(ECG) result before PCI and one hour after PCI,ST-segment elevation of infarct-related lead of 18 lead ECG before and after PCI were evaluated.The patients were classified into two groups according to ST-segment resolution:group A,ST-segment resolution ≥50%;group B,ST-segment resolution 50%.The related factors affecting ST-segment resolution were analyzed and the related factors that affected lately prognosis in patients with acute myocardial infarction(AMI) and treated by primary percutaneous coronary intervention were observed.Results There is no difference in indeadly cardiac event wall motion abnormality,re-elevation of ST-segment after resolution,death in hospital in the two group.Obvious differences were discovered in left ventricular ejection fraction(LVEF).Conclusion ST-segment resolution could be used to predict lately prognosis and instruct clinical therapy in patients with AMI and treated by PCI.