Unlabelled: Normal endothelial function alters physiologically with aging. Intervention of environmental factors precipitates and accelerates endothelial dysfunction progression, correlated with cardiovascular risk.
Aim: To study the impact of environmental factors (smoking, nutritional habits, stress, physical activity) on the imbalance of the endothelial commuting threshold.
Methods: The questionnaire method was applied in order to identify and quantify the presence of environmental factors; an anthropometrical physical exam was performed; metabolic profile (insulin resistance HOMA-IR, lipid parameters) was assessed. Arterial elasticity was assessed with Complior (Artech Medical).
Results: The studied lot (n=80, 21.16 +/- 2.43 years) comprised young medicine students and showed a high incidence of: smoking (31.25%), unhealthy nutritional habits (60%), stress (60%), sedentary lifestyle (25%). The odds for endothelial function alteration were significant only in subjects who associated stress and smoking (OR=8.18, p=0.0006); in the same group, there was noticed the tendency for metabolic profile alteration, meaning insulin resistance (OR=1.19, p=ns). The association stress-smoking did not significantly influence the unhealthy nutritional habits (p=ns, OR=2.39), lipoprotein anomalies (TC > or = 190 mg/dL: p=ns, OR=0.98; LDL > or = 130 mg/dL: p=ns, OR=3.53), or the sedentary lifestyle (p=ns, OR=0.80).
Conclusions: The main environmental factors which determine endothelial function imbalance in young ages are smoking and occupational stress. It is a positive stress which does not lead to significant metabolic anomalies or lifestyle changes. Though, this kind of stress leads to an unhealthy behavior: smoking. The association stress-smoking is essential in endothelial function alteration in young subjects. Primary cardiovascular prevention must focus drastically on unhealthy behaviors correction to reduce cardiovascular risk in young individuals.
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