FIG. 1.

Average change trajectory of matrix metalloproteinase-9 (MMP-9) levels after left anterior descending coronary artery (LAD) occlusion. Average change trajectory with 95% confidence bands for serum MMP-9 levels following coronary occlusion and the onset of spontaneous, ischemic ventricular fibrillation (VF). MMP-9 levels were natural log transformed to better normalize its distribution for analysis. Values were statistically higher than control values by 15 min postocclusion (P = 0.0003). The average onset of VF was at the 30 min time point postcoronary occlusion. The rate of rise at this point was not statistically different from that measured prearrest.