Review Article

Nonalcoholic Fatty Liver Disease and Cardiovascular Diseases: The Heart of the Matter

Table 1

Current evidence of the association between NAFLD and CVD.

Authors, yearCountryType of studyMain characteristicsNAFLD diagnosticResults

Bonnet et al., 2017 [56]FranceProspective, cohort2,565 patients, normotensive, followed up for 9 yearsGGT, FLIGGT was associated with incident hypertension (standardized odds ratio: 1.21; 95% confidence interval (1.10–1.34);  = 0.0001). FLI predicted incident hypertension in a multivariable model.
Huh et al., 2015 [57]South KoreaProspective, cohort1,521 patients, aged 40–70, followed up for 2.6 yearsFLI10.06% of patients developed hypertension; FLI was associated with baseline blood pressure and was an independent risk factor for hypertension.
Lau et al., 2010 [58]GermanyProspective, cohort3191 patients, aged 20–79, followed up for 11.6 yearsUS and liver EnzymesFatty liver disease was associated with hypertension at baseline and at follow-up, OR 2.8; 95% CI 1.3–6.2 and OR 3.1; 95% CI 1.7–5.8, respectively.
Ryoo et al., 2014 [59]South KoreaProspective, cohort11350 patients, only men, aged 30–59, normotensive, followed up for 5 yearsUS58.2% of the participants developed prehypertension, 63.7% of the patients with mild NAFLD, and 70.3% of the ones with severe NAFLD,  < 0.001.
Sung et al., 2014, [60]South KoreaRetrospective, cohort11448 patients, aged 42.1 ± 6.8, normotensive, followed up for 5 yearsUSNAFLD was associated with incident hypertension, after adjustment for multiple confounders [aOR = 1.60 (95% CI 1.30, 1.96;  < 0.001)].
Agac et al., 2013 [61]TurkeyProspective, cross-sectional80 patients with acute coronary syndromeUSNAFLD was present in 81.2% of the patients with acute coronary syndrome; multivariate analysis found NAFLD to be associated with higher SYNTAX score (OR, 13.20; 95% CI, 2.52–69.15).
Agarwal et al., 2011 [62]IndiaProspective, cross-sectional124 patients with T2DMUSCAD was diagnosed in 60.5% of the patients with NAFLD and in 45.2% of the ones without NAFLD.
Arslan et al., 2012 [63]TurkeyProspective, cross-sectional151 patients with newly diagnosed CAD, without T2DMUSNAFLD was diagnosed in 64.9% of the patients. Presence of NAFLD was associated with poor coronary collateral development.
Chan et al., 2014 [64]MalaysiaProspective, cross-sectional399 diabetic patients, mean age 62.8 ± 10.5USNAFLD was found in 49.6% of patients but was not associated with IHD.
Chen et al., 2010 [65]Taiwan, ChinaRetrospective, cross-sectional295 patientsUS, CTNAFLD (OR, 2.462; 95% CI, 1.065–5.691) was found to be an independent factor for the risk of coronary artery calcifications.
Chiang et al., 2010 [66]Taiwan, ChinaRetrospective, cross-sectional724 patientsUSNAFLD was found to be an independent predictor for future CVD risk ≥10% (OR: 1.89,  = 0.004).
Keskin et al., 2017 [67]TurkeyRetrospective, cohort360 patients with STEMIUSMultivariate analysis found grade 3 NAFLD to be a risk factor for in-hospital mortality (OR 4.2).
Perera et al., 2016 [68]Sri LankaProspective120 patients with acute coronary syndromeUSNAFLD was identified in 46.7% of the participants. NAFLD was associated with a higher predicted in-hospital mortality (adjusted OR 31.3, CI 2.2–439.8,  = 0.011) and at 6 months after discharge (adjusted OR 15.59, CI 1.6–130.6,  = 0.011).
Wu et al., 2017 [69]ChinaCross-sectional2345 patientsUSNAFLD was significantly associated with the development of coronary artery calcifications (adjusted OR: 1.348, 95% CI: 1.030–1.765).
Baratta et al., 2020 [6]ItalyProspective898 patients, followed up for 41.4 monthsUSPatients with NAFLD presented over 2x increase in risk of CVEs; patients with liver fibrosis had a 4x increase in risk.
Pastori et al., 2020 [70]MulticenterProspective, cohort1735 patients with nonvalvular atrial fibrillationFLINAFLD was diagnosed in 42.2% of the participants but was not associated with bleeding or with thrombotic risk.
Alexander et al., 2019 [71]Multicenter (Italy, Netherlands, Spain, United Kingdom)Matched cohort study120795 patients with NAFLD or NASH/NAFLD was not found to be associated with increased risk for acute myocardial infarction.

NAFLD: nonalcoholic fatty liver disease; FLI: fatty liver index; US: ultrasound; OR: odds ratio; CI: confidence interval; HR: hazard ratio; CAD: coronary artery disease; T2DM: type 2 diabetes mellitus; CAD: coronary artery disease; IHD: ischemic heart disease; CT: computed tomography; CVD: cardiovascular disease; STEMI: ST segment elevation myocardial infarction; CVE: cardiovascular event; NASH: nonalcoholic steatohepatitis.