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Updated: Jun 8, 2025
Simultaneous Video-EEG-ECG Monitoring to Identify Neurocardiac Dysfunction in Mouse Models of Epilepsy
Published on: January 29, 2018
Bidirectional association between abnormal cardiac conditions and epilepsy: A two-sample Mendelian randomization
Renfu Liu1, Yu Tian1, Xiangtao Zhang1
1Department of Neurosurgery, Neurosurgery Research Institute, The First Affiliated Hospital, Fujian Medical University, Fuzhou 350005, Fujian, China; Department of Neurosurgery, National Regional Medical Center, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou 350212, Fujian, China.
Insights
This study reveals a two-way link between heart conditions like atrial fibrillation and valvular heart disease, and epilepsy. These cardiac issues increase epilepsy risk, while epilepsy can also lead to heart problems.
Area of Science:
- Cardiology
- Neurology
- Genetics
Background:
- Observational studies suggest a link between cardiac conditions and epilepsy.
- The precise nature and direction of this relationship are debated.
- This study investigates the bidirectional association using Mendelian randomization.
Purpose of the Study:
- To investigate the causal relationship between abnormal cardiac conditions and epilepsy.
- To determine if cardiac conditions increase epilepsy risk and vice versa.
- To explore the directionality of the association between epilepsy and heart diseases.
Main Methods:
- Utilized a two-sample bidirectional Mendelian randomization (MR) approach.
- Employed single nucleotide polymorphisms (SNPs) from large genome-wide association studies (FinnGen, UK Biobank).
- Conducted sensitivity analyses using established MR methods (MR-Egger, weighted median, IVW, MR-PRESSO).
Main Results:
- Forward MR suggested atrial fibrillation and flutter (AF) and valvular heart diseases (VHD) may increase epilepsy risk.
- Reverse MR indicated epilepsy may increase susceptibility to AF, VHD, and heart failure.
- A bidirectional relationship was observed between AF, VHD, and epilepsy.
Conclusions:
- Findings support a bidirectional relationship between AF, VHD, and epilepsy.
- Epilepsy may contribute to the development of heart failure.
- Highlights the importance of cardiac screening in epilepsy patients and vice versa.
Background:
Observational studies have consistently indicated a significant correlation between abnormal cardiac conditions and epilepsy. However, the association and direction of this relationship remain a subject of debate. This study employs a two-sample bidirectional Mendelian randomization (MR) approach to investigate the association between abnormal cardiac conditions and epilepsy.
Methods:
Instrumental variables, represented by single nucleotide polymorphisms (SNPs) associated with epilepsy and various abnormal cardiac conditions, were derived from large-scale genome-wide association studies databases, including FinnGen and UK Biobank. Bidirectional MR analysis was conducted to estimate the association between epilepsy and abnormal cardiac conditions. Sensitivity analyses were performed using MR-Egger, weighted median, Inverse Variance Weighted, and MR pleiotropy residual sum and outlier methods.
Results:
The forward MR analysis suggested a potential positive effect of atrial fibrillation and flutter (AF) and valvular heart diseases (VHD) on the risk of epilepsy. Conversely, the reverse MR analysis indicated that epilepsy might increase the susceptibility to AF, VHD, and heart failure.
Conclusion:
The findings support a bidirectional relationship between AF, VHD, and epilepsy, indicating that AF and VHD can elevate the risk of developing epilepsy, while epilepsy, in turn, can also increase the risk of developing AF and VHD. Furthermore, the study suggest that epilepsy may contribute to the development of heart failure. These results underscore the importance of screening for cardiac abnormalities in patients with epilepsy and vice versa, to better understand their clinical significance and potential as modifiable risk factors.
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