J Korean Med Sci.  2012 Apr;27(4):370-376. 10.3346/jkms.2012.27.4.370.

Relation between Anemia and Vulnerable Coronary Plaque Components in Patients with Acute Coronary Syndrome: Virtual Histology-Intravascular Ultrasound Analysis

Affiliations
  • 1Heart Research Center, Chonnam National University Hospital, Gwangju, Korea. myungho@chollian.net

Abstract

The aim of the present study was to evaluate the plaque components and the predictors of thin-cap fibroatheroma (TCFA) in anemic patients with acute coronary syndrome using virtual histology-intravascular ultrasound (VH-IVUS). Anemia was defined according to criteria of the World Health Organization, (i.e. , hemoglobin levels < 13 g/dL in men and < 12 g/dL in women) and we compared VH-IVUS findings between anemia group (171 patients, 260 lesions) and non-anemia group (569 patients, 881 lesions). Anemia group had greater % necrotic core (NC) volume (21% +/- 9% vs 19% +/- 9%, P = 0.001) compared with non-anemia group. Hemoglobin level correlated negatively with absolute NC volume (r = -0.235, P < 0.001) and %NC volume (r = -0.209, P < 0.001). Independent predictors of TCFA by multivariate analysis were diabetes mellitus (odds ratio [OR], 2.213; 95% confidence interval [CI], 1.403-3.612, P = 0.006), high-sensitivity C-reactive protein (OR, 1.143; 95% CI, 1.058-1.304, P = 0.012), microalbuminuria (albumin levels of 30 to 300 mg/g of creatinine) (OR, 2.124; 95% CI, 1.041-3.214, P = 0.018), and anemia (OR: 2.112; 95% CI 1.022-3.208, P = 0.028). VH-IVUS analysis demonstrates that anemia at the time of clinical presentation is associated with vulnerable plaque component in patients with acute coronary syndrome.

Keyword

Acute Coronary Syndrome; Plaque; Anemia; Intravascular Ultrasound

MeSH Terms

Acute Coronary Syndrome/complications/*pathology/ultrasonography
Aged
Albuminuria/urine
Anemia/complications/*diagnosis
C-Reactive Protein/analysis
Coronary Angiography
Creatinine/blood
Diabetes Complications
Female
Hemoglobins/analysis
Humans
Male
Middle Aged
Necrosis/pathology
Odds Ratio
Plaque, Atherosclerotic/*ultrasonography
Predictive Value of Tests
*Ultrasonography, Interventional

Figure

  • Fig. 1 Plaque component analysis according to the presence or absence of anemia at the minimum lumen sites. Results are displayed for (A) absolute and (B) relative quantifications. FT, fibrotic; FF, fibro-fatty; DC, dense calcium; NC, necrotic core.

  • Fig. 2 Plaque component analysis according to the presence or absence of anemia at the largest necrotic core sites. Results are displayed for (A) absolute and (B) relative quantifications. FT, fibrotic; FF, fibro-fatty; DC, dense calcium; NC, necrotic core.

  • Fig. 3 Volumetric plaque component analysis according to the presence or absence of anemia. Results are displayed for (A) absolute and (B) relative quantifications. FT, fibrotic; FF, fibro-fatty; DC, dense calcium; NC, necrotic core.


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