Objectives: To study on characteristíc of the metabolic syndrome (MS) in patients with ischemic heart disease (IHD) using consensus criteria of IDF, AHA/NHLBI, WHF and IASO (2009); to the relationship and correlation between the stenosis level of coronary artery disease and components of the MS in patients with IHD. Subjects and methods: A cross-sectional study was done in 123 patients with IHD at Cardiovascular Center, Hue Central Hospital. Coronary artery disease’s lesions were determined through coronary angiography. The stenosis degree of coronary artery was evaluated according to Pujadas G, the lesions of coronary artery were categorized according to AHA/ACC and were classified by using Gensini index. MS was diagnosed by the consensus criteria of IDF, AHA/NHLBI, WHF and IASO (published in 2009). Results: The MS prevalence was 56.9%, the age ≥ 60 years accounted for 84.29%, of which the group of 60 – 69 undertook the highest prevalence of this syndrome, with 73.33%. (i) The MS prevalence elevated in proportion to BMI, of which the group with BMI ≥ 25 expressed the highest prevalence (85.29%), (ii) Hypertriglyceridemia (accounted for 84.29%) and elevated fasting glucose (Go) (81.83%) were two most popular components, (iii) The most common pattern of MS consisted of 3 components (21.95%): Hypertension (HT) – hypertriglyceridemia- low HDL–c (23.08%), hypertriglyceridemia - low HDL-c- elevated Go (19.23%), (iv) The most common pattern which consists of 4 component was: HT-hypertriglyceridemia-low HDL-c- elevated Go (accounted for 30.44%), then increased waist circumference- HT- hypertriglyceridemia- elevated Go (21.74%), (v) Patients with MS had more frequent number of injured branches of coronary artery and higher degree of stenosis than those without MS (p<0.01), (vi) There was a moderately positive correlation between Gensini index and waist circumference (r=0.423; p<0.01), systolic blood pressure (r=0,448, p <0.05), serum triglycerid (r=0.383; p<0.05) and fasting glucose (r=0.531; p<0.01). There was an inverse correlation between Gensini index and serum HDL-c level (r=-0.301; p<0,01). Conclusion: The MS was a risk factor of cardiovascular disease and associated with the risk of coronary morbidity, the likelihood of more severe, more frequent number of coronary artery’s injured branches. Keyword: Metabolic syndrome, ischemic heart disease, risk factor