OBJECTIVES: The aim of this study was to assess the plaque characteristics in culprit lesions in diabetic patients with acute coronary syndrome (ACS). BACKGROUND: Data of the relationship between diabetes mellitus and plaque characteristics in patients with ACS are lacking. METHODS: We performed grayscale intravascular ultrasound (IVUS) analysis in 422 ACS patients and virtual histology (VH)-IVUS in 310 ACS patients. By subgroup analysis, 112 patients with acute myocardial infarction (AMI) with plaque ruptures also were evaluated. RESULTS: In the diabetic subgroup, high-sensitivity C-reactive protein (hs-CRP) was significantly increased (p = 0.008), multivessel disease was more common (65% vs. 29%, p < 0.001), and plaque burden was greater (79.7 +/- 9.8 mm2 vs. 74.2 +/- 8.9 mm2, p < 0.001). In the subgroup analysis of 112 AMI patients with plaque ruptures, the presence of multiple plaque ruptures (60% vs. 29%, p = 0.001) and thrombus (72% vs. 52%, p = 0.032) were more common in diabetic group. Diabetes mellitus was the independent predictor of hs-CRP elevation (odds ratio [OR]: 3.030, 95% confidence interval [CI]: 1.204 to 7.623, p = 0.019), and multiple plaque ruptures (OR: 2.984, 95% CI: 1.311 to 6.792, p = 0.009) by multivariable analysis. In 310 VH-IVUS subsets, the absolute and percent necrotic core volumes were significantly greater (16.9 +/- 15.1 mm3 vs. 11.5 +/- 11.4 mm3, p < 0.001, and 17.3 +/- 9.4% vs. 13.7 +/- 7.5%, p < 0.001, respectively), and the presence of at least one thin-cap fibroatheroma (TCFA) (60% vs. 42%, p = 0.003) and multiple TCFAs (28% vs. 11%, p < 0.001) were more common in the diabetic group. Diabetes mellitus was the only independent predictor of TCFA by multivariable analysis (OR: 2.139, 95% CI: 1.266 to 3.613, p = 0.004). CONCLUSIONS: Diabetic patients with ACS have more plaques with characteristics of plaque vulnerability, different composition of plaques, and have increased inflammatory status compared with nondiabetic patients with ACS.
OBJECTIVES: The aim of this study was to assess the plaque characteristics in culprit lesions in diabeticpatients with acute coronary syndrome (ACS). BACKGROUND: Data of the relationship between diabetes mellitus and plaque characteristics in patients with ACS are lacking. METHODS: We performed grayscale intravascular ultrasound (IVUS) analysis in 422 ACS patients and virtual histology (VH)-IVUS in 310 ACS patients. By subgroup analysis, 112 patients with acute myocardial infarction (AMI) with plaque ruptures also were evaluated. RESULTS: In the diabetic subgroup, high-sensitivity C-reactive protein (hs-CRP) was significantly increased (p = 0.008), multivessel disease was more common (65% vs. 29%, p < 0.001), and plaque burden was greater (79.7 +/- 9.8 mm2 vs. 74.2 +/- 8.9 mm2, p < 0.001). In the subgroup analysis of 112 AMI patients with plaque ruptures, the presence of multiple plaque ruptures (60% vs. 29%, p = 0.001) and thrombus (72% vs. 52%, p = 0.032) were more common in diabetic group. Diabetes mellitus was the independent predictor of hs-CRP elevation (odds ratio [OR]: 3.030, 95% confidence interval [CI]: 1.204 to 7.623, p = 0.019), and multiple plaque ruptures (OR: 2.984, 95% CI: 1.311 to 6.792, p = 0.009) by multivariable analysis. In 310 VH-IVUS subsets, the absolute and percent necrotic core volumes were significantly greater (16.9 +/- 15.1 mm3 vs. 11.5 +/- 11.4 mm3, p < 0.001, and 17.3 +/- 9.4% vs. 13.7 +/- 7.5%, p < 0.001, respectively), and the presence of at least one thin-cap fibroatheroma (TCFA) (60% vs. 42%, p = 0.003) and multiple TCFAs (28% vs. 11%, p < 0.001) were more common in the diabetic group. Diabetes mellitus was the only independent predictor of TCFA by multivariable analysis (OR: 2.139, 95% CI: 1.266 to 3.613, p = 0.004). CONCLUSIONS:Diabeticpatients with ACS have more plaques with characteristics of plaque vulnerability, different composition of plaques, and have increased inflammatory status compared with nondiabeticpatients with ACS.
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