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Digoxin cannot account for the reported association of EKG abnormalities and rhegmatogenous retinal detachment
D A Frambach1, C E Roy, J L Valentine
1Eye Research Institute of Retina Foundation, Boston, Massachusetts.
Insights
Cardiovascular disease (by EKG criteria) is common in patients with retinal detachment. However, the study found that digoxin, a common heart medication, does not explain the link between EKG abnormalities and retinal detachment.
Area of Science:
- Ophthalmology
- Cardiology
- Biochemistry
Background:
- Rhegmatogenous retinal detachment is associated with a higher prevalence of cardiovascular disease (by EKG criteria) compared to controls.
- Retinal pigment epithelium (RPE) transport, crucial for photoreceptor adhesion, is Na-K ATPase-dependent.
- Digoxin, a Na-K ATPase inhibitor used for cardiovascular disease, was hypothesized as a potential link to EKG abnormalities in retinal detachment patients.
Purpose of the Study:
- To investigate the association between EKG abnormalities and rhegmatogenous retinal detachment.
- To determine if clinical use of digoxin accounts for the observed correlation between EKG abnormalities and retinal detachment.
Main Methods:
- Prevalence of EKG abnormalities was assessed in 299 consecutive patients with primary retinal detachment.
- Patient medication history, specifically digoxin use, was analyzed in relation to EKG findings.
Main Results:
- The prevalence of EKG abnormalities in the study cohort was consistent with previous reports.
- A significant majority (92%) of patients with EKG abnormalities did not report digoxin use.
- This finding suggests digoxin is not the primary factor explaining the association.
Conclusions:
- The clinical use of digoxin does not explain the reported association between EKG abnormalities and rhegmatogenous retinal detachment.
- Further research is needed to elucidate the underlying mechanisms connecting cardiovascular health and retinal detachment.
Abstract:
The prevalence of cardiovascular disease (by EKG criteria) in patients with rhegmatogenous retinal detachments has been reported to be more than four times that found in age-matched controls. Adhesion between the retinal pigment epithelium (RPE) and the photoreceptors is facilitated by RPE transport. Because RPE transport is driven by a Na-K ATPase, it has been suggested that the correlation of EKG abnormalities and retinal detachment may be due to clinical use of digoxin, a Na-K ATPase inhibitor frequently given to patients with cardiovascular disease. The prevalence of EKG abnormalities in 299 consecutive patients with primary retinal detachment is about the same as that reported previously. However, 92% of these patients with EKG abnormalities did not take digoxin. Therefore, clinical use of digoxin cannot account for the reported association of EKG abnormalities and rhegmatogenous retinal detachment.