Effects of coronary artery reperfusion on myocardial infarct size calculated from creatine kinase

The Journal of Clinical Investigation
S F VatnerP R Maroko


The effects of coronary artery reperfusion at 1 and 3 h after occlusion on infarct size (IS) in the conscious dog were compared with a second group of dogs that were not reperfused (24 h occlusion). Infarct size was calculated from creatine kinase (CK) appearing in blood samples (IS(s)) and myocardial CK depletion (IS(m)), and determined from gross and histological inspection of the pathological tissue (IS(p)). Under both conditions, IS(m) correlated well with IS(p). In dogs with 24-h coronary occlusions, IS(s) correlated well with IS(m) (IS(s) = 14.26 + 1.18 x IS(m), r = 0.92). In reperfused dogs, the relationship remained linear but was altered (IS(s) = 15.33 + 2.07 x IS(m), r = 0.89). The slope was significantly greater, P <0.05, than that observed for dogs that were not reperfused, suggesting that more CK appeared in serum per gram of infarct. Similarly, significantly different relationships were observed in the reperfused and nonreperfused dogs, when IS(s) was compared with IS(p). Moreover, the configuration of the serial blood CK curve was changed significantly by reperfusion. In dogs with a 24-h occlusion, CK rose gradually to a peak at 11.4+/-0.5 h. In dogs reperfused at 3 h, CK rose sharply at 3 h and reached a peak at...Continue Reading


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