Epicardial adipose tissue volume is associated with left ventricular remodelling in calcific aortic valve stenosis.

BACKGROUND

The severity of left ventricular (LV) remodelling is only partially related to the severity of aortic valve stenosis; additional factors, including diabetes, insulin resistance, obesity and metabolic syndrome, may play important roles. Epicardial adipose tissue (EAT), now considered as a metabolically active organ, is also linked to these factors.

AIM

To analyse the association between EAT volume measured using computed tomography and LV remodelling in a prospective cohort of patients with aortic stenosis.

METHODS

Consecutive asymptomatic patients with at least mild degenerative aortic stenosis enrolled in a prospective cohort that aimed to assess the determinants of aortic stenosis occurrence and progression constituted our population.

RESULTS

We enrolled 143 patients (78±5 years; 65% men). Mean LV mass and EAT volume were 219±64g and 134±56mL, respectively. LV hypertrophy was diagnosed in 86 patients (60%), and concentric hypertrophy (32%) was the main remodelling pattern. EAT was associated with body mass index (P<0.001) and body surface area (P<0.001), but not with age (P=0.33) or aortic stenosis severity (all P>0.10). EAT was correlated with LV mass (r=0.41; P<0.0001), and after adjustment for age, sex, body mass index/body surface area, hypertension, waist circumference, low-density lipoprotein cholesterol and aortic stenosis severity, EAT was independently associated with LV mass (P=0.01/P=0.02). Similar results were found when EAT and LV mass index (adjusted for body surface area) were considered instead of absolute values (P=0.04).

CONCLUSIONS

In this prospective cohort of patients with aortic stenosis, EAT volume was independently associated with LV mass. Further studies are warranted to elucidate the underlying mechanisms of this link.