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Background The aim of this study was to evaluate whether thrombus aspiration catheter during percutaneous coronary intervention (PCI) in patients with the recovery of acute myocardial infarction (AMI) improves myocardial reperfusion and left ventricular function.Methods Fifty patients with the recovery of AMI were randomly divided into group A (PCI with Diver CE aspiration thrombus catheter) and group C (routine PCI).The basic characteristics,PCI characteristics,myocardial perfusion indexes and clinical data were compared and analyzed.