1. Myocardial Tissue-Level Characteristics of Adults With Metabolically Healthy Obesity.
- Author
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Zhao H, Huang R, Jiang M, Wang W, Chai Y, Liu Q, Zhang W, Han Y, Yan F, Lu Q, Tao Z, Wu Q, Yue J, Ma J, and Pu J
- Subjects
- Adult, Female, Humans, Male, Body Mass Index, Fibrosis, Obesity complications, Obesity diagnostic imaging, Predictive Value of Tests, Prospective Studies, Risk Factors, Stroke Volume, Ventricular Function, Left, Obesity, Metabolically Benign diagnosis
- Abstract
Background: It remains unclear whether adults with metabolically healthy obesity (MHO) have altered myocardial tissue-level characteristics., Objectives: This study aims to assess the subclinical myocardial tissue-level characteristics of adults with MHO., Methods: The EARLY-MYO-OBESITY (EARLY Assessment of MYOcardial Tissue Characteristics in OBESITY; NCT05277779) registry was a prospective, 3-center, cardiac imaging study of obese nondiabetic individuals without cardiac symptoms who underwent cardiac magnetic resonance. Myocardial tissue-level characteristics, including extracellular volume fraction (ECV) and native T2 values, were measured as indicators of myocardial fibrosis and edema. Global longitudinal peak systolic strain and early diastolic longitudinal strain rate were assessed by tissue tracking analysis to detect subclinical systolic and diastolic dysfunction., Results: A total of 120 participants were included: MHO (n = 32; mean age, 38 years; 41% men), metabolically healthy controls without obesity (n = 32; mean age: 37 years; 41% men), and metabolically unhealthy obesity (MUHO) (n = 56; mean age: 37 years; 55% men). The MHO group had higher ECV and native T2 values than healthy controls (both P < 0.001); furthermore, the ECV was higher in the MUHO group than in the MHO group (P = 0.002). The prevalence of myocardial fibrosis was 44% (14 of 32) in the MHO group and 71% (40 of 56) in the MUHO group. Although there was no intergroup difference in left ventricular ejection fraction, the MHO group had reduced global longitudinal peak systolic and early diastolic longitudinal strain rates, indicating subclinical systolic and diastolic dysfunction. Multivariate regression analysis identified increased body mass index to be an independent risk factor for myocardial fibrosis (OR: 6.28 [95% CI: 3.17-12.47]; P < 0.001)., Conclusions: This study provides the first evidence of subclinical myocardial tissue-level remodeling in adults with obesity, regardless of metabolic health. Early identification of cardiac impairment may facilitate preventive strategies against heart failure in the MHO population. (EARLY Assessment of MYOcardial Tissue Characteristics in OBESITY [EARLY-MYO-OBESITY]; NCT05277779)., Competing Interests: Funding Support and Author Disclosures This study received funding support from National Natural Science Foundation of China (U21A20341, 81971570, 81930007, 82202159, 31900821), Science and Technology Commission of Shanghai Municipality (21XD1432100, 22JC1402100, 22DZ2292400, 20Y11910500, 2022ZZ01008, 201409005200), Shanghai Hospital Development Center (SHDC2020CR2025B, SHDC12022102), Shanghai Municipal Health Commission (2022JC013, SHSLCZDZK06204), Shanghai Pudong New Area Health Commission (PW2019D-11), Shanghai Jiao Tong University (YG2019ZDA13), University of Shanghai for Science and Technology (10-20-302-425), Shanghai Clinical Research Center for Aging and Medicine (19MC1910500), and the Shanghai Cancer Institute (ZZ-20-22SYL). The authors have reported that they have no relationships relevant to the contents of this paper to disclose., (Copyright © 2023 American College of Cardiology Foundation. All rights reserved.)
- Published
- 2023
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