- 期刊
Jugular Venous Reflux Could Influence Cerebral Blood Flow: A Transcranial Doppler Study
並列摘要
Purpose: Studies have found significant associations between jugular venous reflux (JVR) and neurological disorders. However, there still lacks evidences that JVR could influence cerebral circulation. The aim of the present study is trying to provide evidences that the retrogradely-transmitted venous pressure of JVR could reach cerebral venous system and has an influence on cerebral blood flow (CBF). Methods: We recruited 50 volunteers. Only 42 subjects' data (55.81±19.96, 23-85 years; 9 women) were analyzed due to poor temporal windows in eight subjects. JVR was determined by color-coded Duplex sonography. Transcranial Doppler study was used to examine the CBF changes during Valsalva maneuver (VM) in each subject. Results: All JVRs were detected during VM. We divided subjects into people with right JVR (n=12), left JVR (n=13) and no JVR (n=21) and four had bilateral JVR. There was a more decrease in CBF during and immediately after VM in right-JVR group than no-JVR group, though the baseline characteristics and arterial blood pressure changes were similar. There were no demographic and hemodynamic differences between left-JVR group and no-JVR group. Conclusion: We are the first to provide evidences that right JVR during VM could influence CBF. However, whether left JVR with or without right JVR may have similar effect on CBF deserves further study. The definite mechanism underlying this finding needs further studies.
延伸閱讀
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