Tehran University Medical Journal

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Background: Coronary Artery Disease (CAD) is one of the leading causes of mortality and morbidity all over the world. One of the most important predictors of outcome of patients with coronary aterey disease is the site of stenosis i.e. Proximal versus nonproximal stenosis. This study designed to evaluate the relationship between CAD risk factors and site of stenosis. Methods: In this case- control study in the patients undergone coronary angiography (CAG) in Imam Khomeini Hospital, Tehran, Iran a total of 125 CAD patients with proximal lesion in CAG enrolled the study as case group and equal sex and age matched number of patients with non proximal lesion selected as control group. Two groups were compared based on presence or absence of DM, hypertension, hyper cholestrolemia, hypertriglyceridemia and cigarette smoking. Results: Relative frequency of DM was 33.6% and 10.4% in case and control group respectively (p< 0.0001). Relative frequency in two groups were 33.6 vs 28.8% For HTN (p= 0.41), 30.4% vs 29.6% for hyper cholestrolemia (p= 0.89), 19.2% vs 16.8% for hypertriglyceridemia (p= 0.062) and 28.8 vs 39.2 for C/S (p= 0.08). Multivessle disease was significantly more prevalent in diabetics compared with non diabetic patients 89.1% vs 61% (p< 0.0001), no relationship was seen with HTN (p= 0.41), Hyper cholest- rolemia (p= 0.052) hypertriglyceridemia (p= 0.38) and cigarette smoking (p= 0.375). Conclusion: Proximal involvement of coronary arteries and multivessle disease in CAD patients is related to the history of DM but not to the history of hypertension, hypercholestrolemia, hypertriglyceridemia and cigarette smoking.

Keywords: Coronary angiography, coronary artery disease, proximal, distal, lesions, cardiac, risk factors

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