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Although endothelial dysfunction is associated with cardiovascular risk factors and is improved by cholesterol-lowering therapy, the relationship between endothelial function and cardiovascular risk factor profiles has not been fully investigated in coronary artery disease patients who have been treated with statins. We investigated endothelial function in male hypercholesterolemic patients (n=53) who underwent statin therapy over 6 months in a cross-sectional study. Patients were classified into three groups based on the results of coronary angiography: a normal coronary artery group (n=15), an angina pectoris group (n=20) and a myocardial infarction group (n=18). Endothelial function was assessed by measuring flow-mediated dilatation after reactive hyperemia in the brachial artery, and serum lipid, lipoprotein (a), glucose and insulin levels were measured. Significant associations were observed between the status of coronary disease and systolic blood pressure, lipoprotein (a), glucose and insulin levels (p &lt;0.05, respectively), and the levels of these risk factors in the myocardial infarction group were higher than those in the other groups. Flow-mediated dilatation was also associated with the status of coronary disease (p &lt;0.05), and the myocardial infarction group showed the lowest levels of flow-mediated dilatation (p &lt;0.05). Flow-mediated dilatation was negatively correlated with systolic and diastolic blood pressures, serum levels of lipoprotein (a), glucose and insulin, and the status of coronary disease. Stepwise multiple regression analysis also revealed that lipoprotein (a), diastolic blood pressure and the status of myocardial infarction were significantly correlated with impaired vasodilatation. Serum lipids, age and smoking habit were independent of flow-mediated dilatation. In conclusion, even after cholesterol-lowering treatment, male patients with myocardial infarction still had endothelial dysfunction, and higher levels of lipoprotein (a) may be associated with endothelial dysfunction in such patients.

Cardiovascular Risk Factor Profiles and Endothelial Function in Coronary Artery Disease Patients Treated with Statins