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Updated: Feb 23, 2026
Calcification of Vascular Smooth Muscle Cells and Imaging of Aortic Calcification and Inflammation
Published on: May 31, 2016
Vascular Calcification and Heart Failure: A Bidirectional Mendelian Randomization and Mediation Analysis
Yajie Cai1, Mengmeng Zhu1, Qian Xu1
1National Clinical Research Center for Cardiovascular Diseases of Traditional Chinese Medicine, Xiyuan Hospital of China Academy of Chinese Medical Sciences, Beijing, China.
Insights
Vascular calcification (VC) significantly increases heart failure (HF) risk, and HF also promotes VC progression, establishing a bidirectional causal link. Atrial fibrillation partially mediates the VC to HF pathway, suggesting targeted interventions.
Area of Science:
- Cardiovascular Medicine
- Genetics
- Epidemiology
Background:
- Observational studies suggest an association between vascular calcification (VC) and heart failure (HF).
- Previous research lacked robust evidence to establish a causal relationship between VC and HF.
- No Mendelian randomization (MR) studies have investigated the causal link between VC and HF.
Purpose of the Study:
- To comprehensively analyze the bidirectional associations between different VC subtypes and HF using MR.
- To explore the causal relationship between VC subtypes (CAC, AAC, CAVS) and HF subtypes (HFall, IHF, ni-HF, ni-HFrEF, ni-HFpEF).
- To identify potential mediating factors in the VC-HF pathway.
Main Methods:
- Employed bidirectional, multivariable, and mediation Mendelian randomization (MR) analyses.
- Utilized accessible genome-wide association study (GWAS) data for VC subtypes: coronary artery calcification (CAC), abdominal aortic calcification (AAC), and calcific aortic valve stenosis (CAVS).
- Included public GWAS data for overall heart failure (HFall), ischemic heart failure (IHF), and non-ischemic heart failure (ni-HF) and its subtypes (ni-HFrEF, ni-HFpEF).
Main Results:
- VC significantly increases the risk of HFall and IHF; CAVS also increases ni-HF risk, but CAC and AAC do not.
- HF (HFall, IHF) promotes VC progression (CAC, AAC, CAVS), confirming a bidirectional causal relationship.
- Atrial fibrillation (AF) was identified as a partial mediator (21.65%) in the causal pathway from CAVS to HFall.
Conclusions:
- A bidirectional causal relationship exists between VC and HF, underscoring the importance of early VC detection and management for HF prevention.
- Controlling HF can help mitigate VC progression, benefiting overall cardiovascular prognosis.
- Targeting AF may be crucial for blocking the 'VC → AF → HF' pathway, offering a novel therapeutic strategy for HF prevention and treatment.
Background:
Although basic research and observational clinical studies have shown an association between vascular calcification (VC) and heart failure (HF), the low level of evidence cannot directly indicate a causal relationship, and no Mendelian randomization (MR) study has been conducted to explore the relationship between VC and HF.
Methods:
This study used bidirectional, multivariable, and mediation MR to comprehensively analyze the associations between different VC subtypes and HF as well as its subtypes from multiple perspectives. Accessible genome-wide association study (GWAS) data of VC were included, covering coronary artery calcification (CAC), abdominal aortic calcification (AAC), and calcific aortic valve stenosis (CAVS). Accessible public GWAS data of HF were also included, covering overall heart failure (HFall), ischemic heart failure (IHF), non-ischemic heart failure (ni-HF) recently published in Nature Genetics, and GWAS data of ni-HF with reduced ejection fraction (ni-HFrEF) and ni-HF with preserved ejection fraction (ni-HFpEF) which were classified based on ejection fraction.
Results:
After sensitivity analysis and multiple correction, the following findings were obtained: (1) VC significantly increases the risk of HF. Specifically, CAC, AAC, and CAVS all significantly increase the risks of HFall and IHF; only CAVS is associated with an increased risk of ni-HF, while CAC and AAC have no impact on ni-HF; VC has no impact on ni-HFrEF or ni-HFpEF. (2) HF also promotes the progression of VC, indicating a bidirectional causal relationship between the two. Specifically, HFall and IHF significantly increase the risks of CAC and AAC; IHF increases the risk of CAVS; no reverse causal relationship is found between ni-HF (including its subtypes) and VC. (3) After two-step MR and multivariable MR correction, atrial fibrillation (AF) is found to partially mediate the causal effect of CAVS on HFall, with a mediation proportion of 21.65%.
Conclusion:
This study reveals a bidirectional causal relationship between VC and HF through two-sample bidirectional MR, suggesting that early detection and management of VC are conducive to the prevention and treatment of HF, especially in high-risk populations such as those with ischemic heart disease. Controlling HF also helps delay the progression of VC and improve vascular status, which is the cornerstone of the prognosis of various cardiovascular diseases. Mediation analysis identifies AF as an important mediating factor, suggesting that screening and intervention of AF may be the key link to block the "VC → AF → HF" pathway, providing new genetic evidence for the prevention and treatment of HF.
