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Association between serum total antioxidant status and coronary microvascular function in idiopathic dilated
M Caliskan1, H Gullu, D Erdogan
1Department of Cardiology, Baskent University, Konya Teaching and Medical Research Center, Hoca Cihan Mah., Saray Cad., No:1, Selcuklu, Konya, Turkey, caliskandr@gmail.com.
Insights
Idiopathic dilated cardiomyopathy (IDC) is linked to impaired coronary microvascular function, indicated by reduced coronary flow reserve (CFR). Increased inflammatory markers like hsCRP correlate with this dysfunction in IDC patients.
Area of Science:
- Cardiology
- Biomedical Science
- Internal Medicine
Background:
- Coronary microvascular impairment is a potential cause of myocardial ischemia and systolic dysfunction in patients with idiopathic dilated cardiomyopathy (IDC).
- Understanding the relationship between inflammatory markers and microvascular function in IDC is crucial for patient management.
Purpose of the Study:
- To investigate the association between serum inflammatory markers, total antioxidant status (TAS), and coronary flow reserve (CFR) in patients with IDC.
- To evaluate coronary microvascular function in IDC patients compared to healthy controls.
Main Methods:
- The study enrolled 41 patients with IDC and 33 healthy controls.
- Serum levels of high-sensitivity C-reactive protein (hsCRP), interleukin-6 (IL-6), tumor necrosis factor-alpha (TNF-α), and TAS were measured.
- Coronary flow reserve (CFR) was assessed using echocardiography.
Main Results:
- Patients with IDC exhibited significantly higher hsCRP levels and lower TAS and CFR compared to controls.
- Lower CFR (<2) in IDC patients was associated with significantly higher hsCRP, TNF-α, and IL-6 levels, and lower TAS.
- CFR showed significant correlations with hsCRP, TAS, red cell distribution width (RDW), IL-6, and TNF-α.
Conclusions:
- Plasma proinflammatory cytokine levels and hsCRP are elevated in patients with IDC.
- Impaired CFR in IDC patients reflects coronary microvascular dysfunction, associated with increased inflammatory markers.
Background:
Coronary microvascular impairment may cause myocardial ischemia and systolic dysfunction in patients with idiopathic dilated cardiomyopathy (IDC).
Patients And Methods:
The study included 41 patients with IDC and 33 healthy control subjects. Serum total antioxidant status (TAS), serum interleukin (IL)-6 levels, and tumor necrosis factor (TNF)-α levels were assayed and coronary flow reserve (CFR) was measured in all subjects via echocardiography.
Results:
High-sensitivity C-reactive protein (hsCRP) levels were significantly higher in patients with IDC than in the control group (3.42 ± 2.14 vs. 1.91± 1.40, p = 0.001). Serum TAS was statistically lower in patients with IDC than in controls (1.23 ± 0.16 vs. 1.77 ± 0.12, p < 0.001). CFR was statistically and significantly lower in the IDC group (2.10 ± 0.39 vs. 3.09 ± 0.49, p < 0.001). The IDC group was subsequently subdivided into two groups according to CFR values, as CFR ≥ 2 and CFR < 2. HsCRP (4.30 ± 2.42 vs. 2.58 ± 1.42, p = 0.01), TNF-α (16.67 ± 8.08 vs. 10.97 ± 1.63, p = 0.01), and IL-6 (7.54 ± 6.16 vs. 3.14 ± 1.10, p = 0.05) values were significantly higher in the CFR < 2 group compared with the higher CFR group. TAS (1.3 ± 0.16 vs. 1.14 ± 0.10, p < 0.001) was significantly lower in the CFR < 2 group. CFR correlated significantly with hsCRP, TAS, red cell distribution width (RDW), IL-6, and TNF-α.
Conclusion:
Plasma proinflammatory cytokine levels are increased in patients with IDC. CFR was impaired as a reflection of impaired coronary microvascular dysfunction in association with increasing plasma proinflammatory cytokine levels and hsCRP levels.
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