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Published on: July 21, 2020
Jugular venous reflux affects ocular venous system in transient monocular blindness
Chih-Ping Chung1, Hung-Yi Hsu, A-Ching Chao
1Department of Neurology, Taipei Veterans General Hospital,Taipei, Taiwan.
Cerebrovascular Diseases (Basel, Switzerland)
|December 4, 2009
Summary
Jugular venous reflux (JVR) impedes ocular venous outflow, potentially causing transient monocular blindness (TMB). This study found wider retinal venules in TMB patients, supporting JVR as a cause of TMB.
Area of Science:
- Ophthalmology
- Neurology
- Vascular Biology
Background:
- Jugular venous reflux (JVR) is more common in transient monocular blindness (TMB) patients.
- JVR may disrupt ocular venous outflow, leading to cerebral and ocular circulatory issues that cause TMB.
- This study investigates the link between JVR, ocular hemodynamics, and TMB.
Purpose of the Study:
- To determine if TMB patients exhibit retinal venule vascular changes.
- To assess if JVR influences ocular venous outflow, indicated by dilated retinal venules.
Main Methods:
- A case-control study compared retinal venule diameters in 31 TMB patients and 31 controls using fundus photography.
- A Valsalva maneuver (VM) experiment in 30 healthy volunteers used Doppler imaging and fundus photography to measure JVR and retinal venule changes.
Main Results:
- TMB patients showed significantly wider retinal venule diameters compared to controls (p < 0.05).
- JVR was associated with a greater increase in retinal venule diameter during VM (p < 0.0003).
Conclusions:
- Findings suggest JVR impedes ocular venous outflow.
- Disturbances in ocular venous circulation due to JVR may be a causative factor in TMB.
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