Institutional members access full text with Ovid®

Share this article on:

Left-ventricular hypertrophy and obesity: a systematic review and meta-analysis of echocardiographic studies

Cuspidi, Cesarea,b; Rescaldani, Martac; Sala, Carlac; Grassi, Guidoa,d

doi: 10.1097/HJH.0b013e328364fb58
Review

Aim: Left-ventricular hypertrophy (LVH) is a frequent complication in obese individuals; an updated review and meta-analysis focusing on this issue is lacking. Thus, we analysed the literature in order to provide a comprehensive information on the left-ventricular structural changes, as assessed by echocardiography, associated to obesity.

Design: A literature search using the keywords ‘left ventricle’, ‘left-ventricular hypertrophy’, ‘cardiac hypertrophy’, ‘obesity’, ‘hypertension’ and ‘echocardiography’ was performed in order to identify relevant papers. Full articles published in English language in the past 12 years reporting studies in adult obese individuals were considered.

Results: A total of 22 studies including 5486 obese individuals were considered. Overall, in the pooled obese population, prevalence of LVH, defined by 12 criteria, was 56.0% (range 20.0–85.0%). Data provided by 15 studies (n = 4999 obese individuals), including 6623 non-obese controls, showed that the probability of having LVH was much higher in cases than in non-obese counterparts (odds ratio 4.19, 95% confidence interval 2.67–6.53, P < 0.01). A meta-regression analysis (n = 2214; 14 studies) showed a direct correlation between BMI and left-ventricular mass (P < 0.01). Among obese patients with LVH (n = 1930; 15 studies), eccentric hypertrophy was more frequent than the concentric phenotype (66 versus 34%; P < 0.01).

Conclusions: Our analysis shows that LVH is present in a consistent fraction of the obese population and that eccentric hypertrophy prevails over the concentric phenotype. As obesity-related LVH is a powerful risk factor for systolic/diastolic dysfunction, the prevention/treatment of obesity may have a strong, favourable impact on incident heart failure.

aDepartment of Health Science, University of Milano-Bicocca

bIstituto Auxologico Italiano

cDepartment of Clinical Sciences and Community Health, University of Milano and Fondazione Policlinico di Milano

dIstituto di Ricerche a Carattera Scientifico Multimedica, Sesto San Giovanni, Milan, Italy

Correspondence to Professor Cesare Cuspidi, Istituto Auxologico Italiano, Clinical Research Unit, Viale della Resistenza 23, 20036 Meda, Italy. Tel: +39 0362 772433; fax: +39 0362 772416; e-mail: cesare.cuspidi@unimib.it

Abbreviations: BP, blood pressure; BSA, body surface area; CIs, confidence intervals; LVH, left-ventricular hypertrophy; ORs, odds ratios; RWT, relative wall thickness

Received 15 April, 2013

Revised 4 June, 2013

Accepted 10 July, 2013

© 2014 Wolters Kluwer Health | Lippincott Williams & Wilkins