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Chest, Vol 94, 1216-1220, Copyright © 1988 by American College of Chest Physicians

ARTICLES

Elevated CK-MB isoenzyme after exercise stress test and atrial pacing in patients with ischemic heart disease

AT Marmor, R Klein, M Plich, D Groshar and A Schneeweiss
Division of Cardiology, Rebecca Sieff Hospital, Safed, Israel.

Using a highly sensitive monoclonal antibody kit for CK-MB, significant release of small amounts of CK-MB isoenzyme after exercise stress test was detected 4 to 6 h after induction of ischemia. This occurred in ten out of 15 patients with ischemic heart disease (66 percent) and in only one of the 18 healthy subjects (5.6 percent) serving as a control group. In five patients with coronary artery disease in whom atrial pacing was performed with simultaneous blood sampling from coronary sinus, a drastic elevation in CK-MB isoenzyme (from 2.04 +/- 2.06 ng/L to 10.88 +/- 6.9 ng/L; p less than 0.001) was detected within 10 to 30 min after induction of acute ischemia. A small but significant increase in total CK also was detected (from 21 +/- 12 IU/L to 52 +/- 14IU/L; p less than 0.01). These preliminary observations have to be further investigated in a larger group of patients before a definitive conclusion can be reached about the clinical significance of CK-MB release during exercise.




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Copyright © 1988 by the American College of Chest Physicians.