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Published on: January 28, 2020
Diagnostic value of C-reactive protein in patients with angiographically documented coronary heart disease
Esin Eren1, Necat Yilmaz, Sadrettin Pence
1Department of Biochemistry, Gaziantep University Medical School, Gaziantep, Turkey.
Insights
Serum C-reactive protein (CRP) can help predict coronary artery disease (CAD). While CRP levels were higher in patients with CAD, they did not correlate with disease severity.
Area of Science:
- Cardiovascular Medicine
- Clinical Chemistry
- Biomarkers
Background:
- Coronary artery disease (CAD) poses a significant global health challenge.
- Accurate diagnostic tools are crucial for early detection and management of CAD.
- Serum C-reactive protein (CRP) is an inflammatory marker with potential prognostic value.
Purpose of the Study:
- To assess the diagnostic utility of serum C-reactive protein (CRP) levels in identifying angiographically confirmed coronary artery disease (CAD).
- To investigate the correlation between CRP levels and the severity of CAD, including the number of diseased vessels and degree of stenosis.
Main Methods:
- Blood samples were collected from 198 patients with angiographically documented CAD, 85 patients with clinical indications but no CAD, and 41 healthy volunteers.
- Serum CRP levels were measured 24 hours prior to coronary angiography.
- CAD severity was quantified by the number of affected vessels and degree of arterial stenosis.
Main Results:
- CRP levels were significantly elevated in patients with CAD compared to control groups (p<0.05).
- Receiver Operating Characteristic (ROC) curve analysis indicated a diagnostic value for CRP in predicting CAD, particularly in females (0.659) versus males (0.542).
- CRP levels did not show a significant association with the number of diseased vessels or the degree of stenosis (p>0.05).
- Multiple logistic regression identified CRP as an independent risk factor for CAD after adjusting for established risk factors.
Conclusions:
- Serum CRP measurement demonstrates diagnostic value in predicting the presence of angiographically confirmed CAD.
- CRP levels are not associated with the degree or severity of coronary artery disease.
- CRP may serve as a valuable independent biomarker for CAD detection.
Aim:
The aim of this study was to evaluate the diagnostic value of serum C-reactive protein (CRP) level measurement in predicting coronary artery disease (CAD) that can be shown angiographically.
Methods:
CRP levels were determined in the blood of 198 patients (patients group, PG) with angiographically documented coronary artery disease and compared with that of 85 patients (control group, CG) who had a clinical indication for coronary angiography but have no angiographically determined coronary artery stenosis, as well as with that of 41 healthy volunteers as a healthy control group (HG) who did not have any complaint and did not have coronary angiography. CRP levels were measured 24 hours prior to angiography in PG and CG patients, and in the morning after not having eaten for same time. Any coronary artery stenosis or plaque formation was defined as CAD. Severity of the disease was assessed by both the number of diseased vessels (0 to 3) and the degree of stenosis (<50% mild, 50-70% moderate and >70% severe).
Results:
Receiver Operating Characteristics (ROC) curves of CRP in angiographically documented CAD group showed a diagnostic value of 0.659 in female patients, followed by 0.542 in male patients, in predicting CAD. CRP levels were found to be significantly different between groups, higher in PG (6.2 +/- 0.86 mg/L) than those of CG (3.7 +/- 0.92 mg/L) and HG (0.854 +/- 0.2 mg/L) (p<0.05). CRP levels were not associated with the number of diseased vessels, neither with the degree of the occlusion (p>0.05). Multiple logistic regression analysis after adjustment for the established coronary risk factors showed CRP as an independent discriminating risk factor for CAD.
Conclusion:
It is concluded that CRP measurement has a value in predicting the presence of angiographically documented CAD. However, CRP levels were not associated with the degree or severity of CAD.
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