Purpose:
Visceral Adipose Tissue (VAT) as a source of pro
inflammatory and biological mediators is implicated in adverse
cardiac structure remodeling, functional alternations, and results
in Heart Failure (HF) in central obese patients. However, the
impact of different distributions of visceral fat on cardiac
structural/functional changes still remains unclear.
Methods:
This retrospective analysis includes 354 subjects free
from previous myocardial infarction, coronary arterial disease,
stroke, or clinical HF. Regional VAT including Pericardial Fat
(PCF) and Thoracic Periaortic Fat (TAT) volumes, fatty liver
grades were all measured by Multi-Detector Computed
Tomography (MDCT) (Aquarius 3D Workstation, TeraRecon,
San Mateo, CA, USA) and abdominal sonography (Toshiba
Nemio SSA-550A). We measured Left ventricular mass/mass
index (LVM/LVMI), LV Mass to Volume ratio (LVMVI), Left
Atrium (LA) diameter represented as cardiac remodeling, and
analyzed their association with adiposity measures.
Results:
All VAT are significantly associated with worsening
cardio-metabolic profiles (hs-CRP, metabolic scores, coronary
calcium score) (all P<0.05). Excess PCF/TAT wassignificantly
associated with larger LVM/LVMI, LVMVI, and LA diameter
(all P<0.05); presented in LV concentric remodeling, it further
worsens LV diastolic function. In multivariate models, this effect
on LA remodeling was attenuated in TAT after adjusting for the
clinical variable (P=0.052). However, there was no correlation
between hepatic fat and LV/LA structural/functional alternations.
Conclusion:
Accumulated visceral adiposity, especially PCF deposits,
was associated with certain cardiac structural/functional
remodeling characterized by impaired LV diastolic function. PCF
may exhibit a local effect on adjacent cardiac structure more than
TAT and hepatic fat. Our data suggested that PCF may serve as
an independent predictor to screen subclinical heart failure in
asymptomatic population.