CCR2 and infarction: In models where particular populations were not present before inducing an infarction, considerable differences were observed in the late effects of myocardial damage: echocardiography performed 28 days after the ischemic episode in mice without the CCR2+ macrophages displayed a smaller akinetic area, better systolic function, and smaller size of the left ventricle compared to those in specimens without the CCR2− group.