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  • Title: Long-term prognostic value of creatine kinase-myocardial band mass after cardiac surgery in low-risk patients with stable angina.
    Author: Vikenes K, Andersen KS, Melberg T, Farstad M, Nordrehaug JE.
    Journal: Cardiology; 2009; 113(2):122-31. PubMed ID: 19039220.
    Abstract:
    OBJECTIVES: The long-term prognostic value (>5 years) of elevated cardiac biomarkers after elective cardiac surgery is not clear. Most previous studies have included high-risk, unstable patients. The aim of this study was to determine the prognostic value of creatine kinase-myocardial band (CK-MB) mass after elective cardiac surgery in low-risk patients with stable angina. METHODS: A total of 230 consecutive patients undergoing cardiac surgery were included in the final analysis. Blood samples were drawn just before and 1-3 and 4-8 h after the procedure, and every morning thereafter for 3 days. Using a cutoff value of 5 times the reference, 100 patients (43.6%) had peak CK-MB mass values > or =25 microg/l, and 130 patients had values <25 microg/l (defined as controls). No patient developed new Q waves on ECG. The median follow-up time was 95 months. RESULTS: All-cause mortality and readmission for acute coronary syndromes were more frequent in the high-CK-MB group (30.0 vs. 17.9%, p = 0.022), as was target vessel revascularization (20.6 vs. 5.4%). Comparing the quartiles of peak CK-MB values in a Kaplan-Meier survival plot, event-free survival for the upper quartile (n = 60) was 68.3%, and for the lower quartile (n = 55), it was 83.6% (p = 0.046). In a multivariate logistic regression analysis, high CK-MB and ejection fraction were the only variables independently related to reduced event-free survival. CONCLUSIONS: CK-MB values > or =5 times the reference after elective cardiac surgery are associated with reduced long-term event-free survival.
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