Key result
Significant CAD is linked to ~40% greater epicardial adipose tissue thickness and worse hepatic steatosis.
Why the study?
The association between non-alcoholic fatty liver disease, epicardial adipose tissue mass, and coronary artery disease severity was not well established.
Cross-Sectional (n=60)
No
Absolute Event Rate: 7.859% vs 5.6%
p-value: p=<0.001
Epicardial adipose tissue thickness measured by echocardiography strongly correlates with both the severity of hepatic steatosis and the presence of significant coronary artery disease.
May link NAFLD and epicardial fat to CAD severity; leaves open causal and prognostic value.
Background Regional adiposity has a significant impact on the formation of adverse metabolic and cardiovascular risk profiles. While much of the attention was directed to the importance of intra-abdominal adipose tissue, there were several new investigations about mediastinal and epicardial regions’ visceral adiposity. Our study aimed to determine the association between non-alcoholic fatty liver and increased epicardial adipose tissue mass with coronary artery disease severity. Methods This study was conducted on sixty patients who presented with symptoms of coronary artery disease and attended elective coronary angiography to rule out coronary artery disease. All patients have been subjected to full hepatic profile, noninvasive scoring system such as Fibrosis-4 and non-alcoholic fatty liver disease fibrosis score and abdominal ultrasound for diagnosis of non-alcoholic fatty liver disease and trans-thoracic echocardiography for measurement of average epicardial adipose tissue thickness. Student T test, analysis of variance test, chi-square test, and Fisher’s exact test were used for statistical analysis. Results According to the severity of coronary artery disease, patients with significant coronary stenosis had statistically significant higher degree of hepatic steatosis in abdominal ultrasound (P value < 0.001) while regarding the non-alcoholic fatty liver disease fibrosis score and Fibrosis-4 for non-alcoholic fatty liver disease diagnosis, there was no significance between both groups. Also, the epicardial adipose tissue mean thickness was found to be statistically significantly higher among those with significant coronary stenosis than those without [7.859 ± 0.691 mm versus 5.600 ± 0.386 mm]. Moreover, statistically significant higher epicardial adipose tissue thickness values were found among grade 3 hepatic steatosis than in grades 2, 1, or 0 (P value < 0.001). At a cutoff > 6.1 mm, epicardial adipose tissue thickness was a valuable tool in discrimination between significant and non-significant coronary artery disease with specificity and sensitivity of 100%. Conclusion High epicardial adipose tissue thickness may represent a marker of severity of non-alcoholic fatty liver disease as well as an independent predictor of coronary artery disease risk.
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Rasmy et al. (2022) conducted a cross-sectional in Coronary artery disease (n=60). Significant coronary artery disease (>50% stenosis) vs. Non-significant coronary artery disease (<50% stenosis) was evaluated on Mean epicardial adipose tissue (EAT) thickness (p=<0.001). Significant coronary artery disease was associated with a higher degree of hepatic steatosis and greater mean epicardial adipose tissue thickness (7.859 mm vs 5.600 mm, p<0.001) compared to non-significant disease.
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