SYN1 and myocardial infarction: What is important is SYN1, besides being considered a purely perfusion-based PET/CT radiotracer, showed a trend similar to [18F]-FDG and LV EF, with increased signal in postinfarction hearts, inversely correlating with genes upregulated after MI and directly correlating with downregulated genes in the MI group (Aldob), although these trends were statistically significant for Trem2 and Aldob only (p = 0.07 and 0.05, respectively).