Enhanced phagocytic and migratory activity of monocytes in patients following AMI. (A) MFI determined by flow cytometry and (B) 19F-MRI were significantly increased in total monocytes and even more pronounced in the intermediate subpopulation derived from patients in the 3D-AMI group compared with that in the healthy control. (C) When primed by MCP-1 present in the lower chamber, the monocytes from the 3D-AMI group exhibited enhanced mobility in a trans-membrane assay. **P<0.01 compared to healthy; §P=0.0193 MFI between all mono and intermediate subset; #P<0.05 compared to unstimulated condition without MCP-1. MFI, mean fluorescence intensity; AMI, acute myocardial infarction; 3D, at 3 days; 19F-MRI, 19F intensity in MRI; all mono, total monocytes; MCP-1, monocyte chemoattractant protein 1.