Key result
Elevated troponin and CPK independently predict CK-MB levels post-myocardial infarction.
Why the study?
The predictive relationships between CK-MB and troponin I/T, CPK, and CRP markers were evaluated to improve clinical interpretation in post-MI settings where CK-MB assays are unavailable.
Does predictive modeling using Troponin I/T, CPK, and CRP accurately estimate CK-MB levels in patients post first-time myocardial infarction?
Cohort (n=102)
Yes
Does predictive modeling using Troponin I/T, CPK, and CRP accurately estimate CK-MB levels in patients post first-time myocardial infarction?
Troponin I/T and total CPK are independent predictors of CK-MB levels in post-MI patients, offering reliable clinical correlates when specific CK-MB assays are unavailable.
Answers are grounded in this paper and cite their sources.
Supports concordance between routine cardiac biomarkers but should not change practice; leaves open the incremental clinical value of combined CK-MB and troponin testing.
INTRODUCTION: Myocardial infarction (MI) continues to be a leading cause of global morbidity and mortality. This study evaluated the predictive relationships between Creatine Kinase-MB (CK-MB) and Troponin I/T (cTnI/T), creatine phosphokinase (CPK), and C-reactive protein (CRP) markers to improve clinical interpretation where CK-MB assays are unavailable. MATERIALS AND METHODS: A retrospective cohort of 102 first-time MI patients from multiple Saudi hospitals was analyzed. Demographic, biochemical, and clinical data were extracted, and univariable and multivariable linear regressions were performed via R (v4.4.2). Subgroup analyses by age, sex, and body mass index were conducted to explore demographic variations. RESULTS: Mean CK-MB levels were 60.85 ± 51.69 U/L in males and 53.71 ± 45.44 U/L in females. cTnI/T, averaged 7.87 ± 12.65 ng/mL, total CPK 370.85 ± 466.99 U/L, and CRP 22.09 ± 14.12 mg/L. Univariable regression revealed strong positive association of CK-MB with cTnI/T, (estimate = 2.98, P < 0.0001, R2 = 0.583), CPK (estimate = 0.082, P < 0.0001, R2 = 0.468), and CRP (estimate = 1.67, P < 0.0001, R2 = 0.202). In the multivariable model, cTnI/T (estimate = 2.33, P < 0.0001) and CPK (estimate = 0.047, P < 0.0001) remained independent predictors, while CRP lost significance (P = 0.192). DISCUSSION AND CONCLUSION: These findings support using cTnI/T and CPK as reliable clinical correlates for CK-MB estimation in post MI evaluation, especially when laboratory access is limited.
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Alzain et al. (2026) conducted a cohort in Myocardial infarction (n=102). Troponin I/T (cTnI/T), creatine phosphokinase (CPK), and C-reactive protein (CRP) was evaluated on Creatine Kinase-MB (CK-MB) levels (estimate = 2.33 (cTnI/T), estimate = 0.047 (CPK), p=<0.0001). Troponin I/T (estimate=2.33, P<0.0001) and CPK (estimate=0.047, P<0.0001) independently predicted CK-MB levels in patients post myocardial infarction.
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