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Effects of adipose tissues on the relationship between type 2 diabetes mellitus and reduced heart rate variability: mediation analysis
Background: Type 2 diabetes mellitus (T2DM) is associated with decreased heart rate variability (HRV) with an unclear intermediate mechanism. This study aimed to conduct mediation analysis to explore the impact of various adipose tissues on the relationship between T2DM and HRV.
Methods: A total of 380 participants were enrolled for analysis, including 249 patients with T2DM and 131 non-diabetic controls. The thicknesses of four adipose tissues (subcutaneous, extraperitoneal, intraperitoneal, and epicardial) were measured by abdominal ultrasound or echocardiography respectively. HRV was assessed by 24-hour Holter for monitoring both frequency domain indices (LF, HF, and LF/HF) and time domain indices (SDNN, SDANN, SDNN index, rMSSD and pNN50). Mediation analysis was used toexamine whether adipose tissues mediated the relationship between T2DM and each index of HRV. Then, a latent variable - HRV burden - was constructed by struct ural equation model with selected HRV indices to comprehensively assess the whole HRV.
Results: Compared to non-diabetic controls, patients with T2DM exhibited a significant reduction in indices of HRV, and a remarkable increase in the thicknesses of extraperitoneal, intraperitoneal, and epicardial adipose tissues. Mediation analysis found significant indirect effects of T2DM on six indices of HRV, including HF, SDNN, SDANN, SDNN index, rMSSD, and pNN50, which was mediated by epicardial adipose tissue rather than other adipose tissues, with the mediation proportions of 64.21%, 16.38%, 68.33%, 24.34%, 24.10% and 30.51%, respectively. Additionally, epicardial adipose tissue partially mediated the relationship between T2DM and reduced HRV burden (24.26%), which composed by SDNN, SDNN index, rMSSD, and pNN50.
Conclusion: Epicardial adipose tissue partially mediated the relationship between T2DM and reduced HRV, which reinforces the value o f targeting heart-specific visceral fat to prevent cardiac autonomic neuropathy in diabetes. © The Author(s) 2024.
Authors : Ouyang X.; Peng L.; Huang Z.; Wang T.; Wang J.; Wu H.; Zhong J.; Wu B.; Wu L.; Li Y.; Lu Y.; Li S.; Tang X.
Source : BioMed Central Ltd
Article Information
| Year | 2024 |
| Type | Article |
| DOI | 10.1186/s12933-024-02438-1 |
| ISSN | 14752840 |
| Volume | 23 |
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