Figure 2

Microvascular blood flow measured using laser Doppler velocimetry in the myocardium before and after 5, 10, 15, and 20 minutes of occlusion of the left anterior descending artery (LAD). Note the decrease in microvascular blood flow, from 311.7 ± 106.2 PU before, to 84.2 ± 29.9 PU after 20 minutes' occlusion of the LAD, in the area studied. Significance was defined as *p < 0.05, **p < 0.01, ***p < 0.001 and p > 0.05 (not significant, n.s.). Values are presented as means ± the standard error on the mean (SEM).