Evaluation of increased serum creatine kinase as an indicator of irreversible myocardial damage in dogs.
To evaluate the relationship between creatine kinase (CK) elevation and irreversible myocardial damage, a coronary artery branch was occluded for periods of 5 to 40 min in ten dogs. In five other dogs the coronary vessel was occluded for 480 min, and five dogs underwent the same operative procedure but without occlusion of the artery. The serum CK was monitored for 8 hours postoperatively in all dogs. Elevation of the CK levels occurred in all groups, but the area under the time-enzyme activity curve showed no statistically significant difference between the group with 480-min occlusion, in which transmural myocardial infarction occurred in all dogs, and the group with temporary occlusion, in which no infarction could be histologically or histochemically demonstrated. Contrastingly, a statistically significant difference was found between the group with temporary occlusion and the control group with no occlusion. The results suggest that CK elevation is of no value as an indicator of irreversible myocardial damage during heart surgery that involves temporary myocardial ischaemia.
D000818:Animals; D001157:Arterial Occlusive Diseases / Q000201:enzymology; D009202:Cardiomyopathies / Q000201:enzymology* / Q000503:physiopathology; D003331:Coronary Vessels / Q000201:enzymology; D003402:Creatine Kinase / Q000097:blood*; D004285:Dogs; D006439:Hemodynamics; D009206:Myocardium / Q000473:pathology
D003402:Creatine Kinase