NDLI: The additive effects of obesity on myocardial microcirculation in diabetic individuals: a cardiac magnetic resonance first-pass perfusion study

Content Provider	Springer Nature : BioMed Central
Author	Jiang, Li Shi, Ke Guo, Ying-kun Ren, Yan Li, Zhen-lin Xia, Chun-chao Li, Lei Liu, Xi Xie, Lin-jun Gao, Yue Shen, Meng-ting Deng, Ming-yan Yang, Zhi-gang
Abstract	Background The microvascular effects of obesity should be considered in diabetic individuals for elucidating underlying mechanisms and developing targeted therapies. This study aims to determine the effect of obesity on myocardial microvascular function in type 2 diabetes mellitus (T2DM) patients using cardiac magnetic resonance (CMR) first-pass perfusion imaging and assessed significant risk factors for microvascular dysfunction. Materials and methods Between September 2016 and May 2018, 120 patients with T2DM (45.8% women [55 of 120]; mean age, 56.45 ± 11.97 years) and 79 controls (44.3% women [35 of 79]; mean age, 54.50 ± 7.79 years) with different body mass index (BMI) scales were prospectively enrolled and underwent CMR examination. CMR-derived perfusion parameters, including upslope, time to maximum signal intensity (TTM), maximum signal intensity (MaxSI), MaxSI (-baseline), and SI (baseline), and T2DM related risk factors were analyzed among groups/subgroups both in T2DM patients and controls. Univariable and multivariable linear and logistic regression analyses were performed to assess the potential additive effect of obesity on microvascular dysfunction in diabetic individuals. Results Compared with controls with comparable BMIs, patients with T2DM showed reduced upslope and MaxSI and increased TTM. For both T2DM and control subgroups, perfusion function gradually declined with increasing BMI, which was confirmed by all perfusion parameters, except for TTM (all P < 0.01). In multivariable linear regression analysis, BMI (β = − 0.516; 95% confidence interval [CI], − 0.632 to − 0.357; P < 0.001), female sex (β = 0.372; 95% CI, 0.215 to 0.475; P < 0.001), diabetes duration (β = − 0.169; 95% CI, − 0.319 to − 0.025; P = 0.022) and glycated haemoglobin (β = − 0.184; 95% CI, − 0.281 to − 0.039; P = 0.010) were significantly associated with global upslope in the T2DM group. Multivariable logistic regression analysis indicated that T2DM was an independent predictor of microvascular dysfunction in normal-weight (odds ratio[OR], 6.46; 95% CI, 2.08 to 20.10; P = 0.001), overweight (OR, 7.19; 95% CI, 1.67 to 31.07; P = 0.008) and obese participants (OR, 11.21; 95% CI, 2.38 to 52.75; P = 0.002). Conclusions Myocardial microvascular function gradually declined with increasing BMI in both diabetes and non-diabetes status. T2DM was associated with an increased risk of microvascular dysfunction, and obesity exacerbated the adverse effect of T2DM.
Related Links	https://cardiab.biomedcentral.com/counter/pdf/10.1186/s12933-020-01028-1.pdf
Ending Page	13
Page Count	13
Starting Page	1
File Format	HTM / HTML
ISSN	14752840
DOI	10.1186/s12933-020-01028-1
Journal	Cardiovascular Diabetology
Issue Number	1
Volume Number	19
Language	English
Publisher	BioMed Central
Publisher Date	2020-05-06
Access Restriction	Open
Subject Keyword	Diabetes Angiology Cardiology Body mass index Cardiac magnetic resonance first-pass perfusion imaging Myocardial microvascular function Obesity Type 2 diabetes mellitus
Content Type	Text
Resource Type	Article
Subject	Cardiology and Cardiovascular Medicine Internal Medicine Endocrinology, Diabetes and Metabolism
Journal Impact Factor	8.5/2023
5-Year Journal Impact Factor	8.9/2023

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