[Endothelial dysfunction and risk factors in coronary heart disease]

Area of Science:

• Cardiovascular Medicine
• Vascular Biology
• Clinical Research

Background:

• Endothelial dysfunction (ED) is an early indicator of atherosclerosis and a predictor of cardiovascular events.
• Assessing ED is crucial for understanding coronary heart disease (CHD) progression and risk stratification.
• Standard risk factors for cardiovascular disease may influence the prevalence and severity of ED.

Purpose of the Study:

• To evaluate the degree of endothelial dysfunction in patients with coronary heart disease compared to healthy controls.
• To investigate the relationship between endothelial dysfunction and the number of standard cardiovascular risk factors.

Main Methods:

• Reactive hyperemia test was performed on 64 CHD patients and 38 healthy individuals.
• Endothelial dysfunction was assessed by measuring the relative increase in brachial artery diameter (endothelium-dependent vasodilation) and circulating endothelial cells (CEC).
• Patients were categorized based on the number of standard cardiovascular risk factors.

Main Results:

• Signs of ED were observed in 6.5% of controls, 40% of patients in group II, and 59% in group III (p < 0.05).
• Patients with four or more risk factors exhibited a six-fold increase in the relative frequency of ED compared to those with none or one risk factor.
• No signs of ED were detected in patients with no or only one risk factor.

Conclusions:

• Endothelial dysfunction is significantly more prevalent in coronary heart disease patients than in healthy individuals.
• The presence of multiple cardiovascular risk factors is strongly associated with a higher incidence of endothelial dysfunction.
• These findings highlight the importance of managing risk factors to prevent or mitigate endothelial dysfunction in CHD.