The myocardial blood flow, infarct size, first-pass perfusion and delayed enhancement signal intensity in acute, subacute, and chronic infarctions. The regional myocardial blood flows in the infarcted areas were progressively recovered with the evolution of the myocardial infarction (A). The infarct size tended to decrease with the development of post-infarction remodeling (B). Interestingly, there were gradual increases in the peak signal intensities for both first-pass perfusion and delayed enhancement (C).