Objective: To observe the changes of multi-noninvasive indexes including endothelial function, arterial flexibility, carotid intima-media thickness (IMT) and serum inflammatory cytokines in patients with mild coronary stenosis.
Methods: One hundred and five patients were divided into three groups according to the result of coronary angiography: coronary heart disease (stenosis > or = 50% in at least one coronary segment), mild coronary stenosis (stenosis < 50% in at least one coronary segment) and control group (normal coronary). Brachial-ankle pulse wave velocity (baPWV) and ankle-brachial index (ABI), reflecting arterial flexibility and the lower extremity vascular disease respectively, were measured by a Colin system, carotid artery IMT was detected echocardiographically. Serum levels of NO, vWF, hs-CRP were measured before coronary angiography in all patients.
Results: baPWV [(1482 +/- 155) cm/s vs. (1249 +/- 158) cm/s] and carotid IMT [(0.88 +/- 0.18) mm vs. (0.72 +/- 0.20) mm] were significantly higher while serum levels of NO [(64 +/- 17) micromol/L vs. (83 +/- 17) micromol/L] was significantly lower in mild coronary stenosis group than those in control group (all P < 0.05). vWF, ABI and hs-CRP were similar between the two groups (all P > 0.05). Logistic regression analysis showed that NO, baPWV, smoking are independent predicting factors for mild coronary stenosis (all P < 0.05).
Conclusions: Endothelial dysfunction, reduction of the arterial flexibility as well as increased serum inflammation were associated with mild coronary stenosis.
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