JOURNAL ARTICLE
OBSERVATIONAL STUDY
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Pericardial and visceral, but not total body fat, are related to global coronary and extra-coronary atherosclerotic plaque burden.

BACKGROUND: To explore the relationship between coronary and extra-coronary atherosclerotic plaque burden with total and regional fat depots among patients undergoing ECG-gated aortic computed tomography angiography (CTA).

METHODS: The subjects of this study comprised a cohort of consecutive patients who underwent ECG-gated thoracoabdominal CTA. We assessed the number of coronary segments with plaques (segment-involvement score, SIS); and the extra-coronary atherosclerotic plaque burden, comprising the aorta and supra-aortic trunks, iliofemoral arteries, and visceral arteries (extra-coronary SS). Total and regional fat volume (FV) were calculated.

RESULTS: A total of 2700 vascular segments were evaluated in 90 patients. Obese patients (n = 31, 34%) showed similar coronary SIS (p = 0.41) and extra-coronary SS (p = 0.22) than non-obese patients. General body fat measurements were not related to atherosclerotic plaque burden scores, without associations between coronary or extra-coronary plaque burden and BMI (p = 0.68, and p = 0.91), abdominal circumference (p = 0.13, p = 0.89), total body FV (p = 0.50, p = 0.98), or abdominal FV (p = 0.51, p = 0.99). Pericardial FV was related to coronary SIS (p < 0.0001) and extra-coronary SS (p = 0.008), and visceral FV was related to the coronary SIS (p = 0.006) and extra-coronary SS (p = 0.056). Abdominal subcutaneous fat was inversely related to coronary SIS (p = 0.038) and extra-coronary SS (p = 0.010). Pericardial FV was identified as the only independent predictor of extensive coronary [OR 1.020 (95% CI 1.001-1.039), p = 0.036] and extra-coronary [OR 1.018 (95% CI 1.001-1.036), p = 0.035] plaque burden.

CONCLUSIONS: In the present study, pericardial and visceral fat were associated with an increased atherosclerotic burden, whereas we identified an inverse relationship between subcutaneous abdominal fat and plaque burden.

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