| Title: | Lean Body Mass is the Independent and Predominant Anthropometric Variable Associated With Atrioventricular Block |
| Journal: | Heart Rhythm O2 |
| Published: | 1 Mar 2026 |
| DOI: | https://doi.org/10.1016/j.hroo.2026.02.028 |
| URL: | http://dx.doi.org/10.1016/j.hroo.2026.02.028 |
Publication 17573
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Abstract
Background Information regarding the association between lean body mass (LBM) and atrioventricular (AV) block risk is lacking. Objective To determine the associations of LBM with AV block risk. Methods We analyzed 370,415 UK Biobank participants who underwent bioimpedance analysis and had no history of AV block or cardiac implantable electronic devices. The primary outcome was a composite of second- or third-degree AV block. Secondary outcomes included each component of the primary outcome and AV block-related pacemaker implantation. Adjusted hazard ratios (HRs) and 95% confidence intervals (CIs) per 1-SD increase in LBM were estimated using multivariable Cox regression. Results The mean age was 56.8 years, and 52.4% were women. During a median 11.8-year follow-up, 1519 and 677 primary outcome events occurred in men and women, respectively. LBM per 1-SD increase (7.7 kg in men and 5.0 kg in women) was associated with a 15% (HR: 1.15, 95% CI: 1.09-1.21, P<0.001) and 13% (HR: 1.13, 95% CI: 1.05-1.22, P=0.001) higher risk of the primary outcome in men and women, respectively. Associations remained significant even after adjustment for various anthropometric variables. Similar patterns were observed for all secondary outcomes. Higher LBM was associated with prolonged PQ interval. The sex difference in incident primary outcome was attenuated after LBM adjustment. Conclusion Higher LBM was associated with increased AV block risk in both sexes and with a higher prevalence of a prolonged PQ interval. Sex differences in AV block risk may be partly mediated by differences in LBM.</p>
7 Authors
- Ho-Gi Chung
- Pil-Sung Yang
- Han-Joon Bae
- Hanjin Park
- Daehoon Kim
- Jung-Hoon Sung
- Boyoung Joung
1 Application
| Application ID | Title |
|---|---|
| 77793 | The causal inference study to determine the association of genetically predicted biological, behavioral, ethnic factors with risk of atrial fibrillation and its associated complications. |
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