Related Experiment Video
Updated: Aug 3, 2026
Comprehensive Endovascular and Open Surgical Management of Cerebral Arteriovenous Malformations
Published on: October 20, 2017
Evaluation of cerebral blood flow in arteriovenous malformations by the xenon 133 inhalation method
Insights
Regional cerebral blood flow (rCBF) was elevated in patients with arteriovenous malformations (AVM). Superficial AVMs showed greater rCBF differences, indicating potential for this non-invasive method in understanding AVMs.
Area of Science:
- Neurology
- Radiology
- Medical Imaging
Background:
- Arteriovenous malformations (AVMs) are complex vascular lesions.
- Understanding blood flow dynamics in AVMs is crucial for diagnosis and management.
- Previous studies often relied on invasive techniques.
Purpose of the Study:
- To investigate regional cerebral blood flow (rCBF) in patients with AVMs using a non-invasive method.
- To compare rCBF in AVM patients with normal controls and patients with subarachnoid hemorrhage (SAH).
- To assess the utility of rCBF studies in characterizing AVMs.
Main Methods:
- Fifteen regional cerebral blood flow (rCBF) studies were performed on 14 patients with diagnosed AVMs.
- All patients had confirmed AVMs via angiography and CT scans.
- rCBF was measured using an inhalation technique, a non-invasive approach.
Main Results:
- rCBF was significantly increased in the hemisphere affected by AVM compared to the unaffected hemisphere.
- This increase in rCBF was more pronounced with superficial AVMs.
- Patients with AVMs exhibited a higher incidence of high flow regions and greater flow variability than normal controls.
Conclusions:
- The non-invasive rCBF inhalation method reveals elevated blood flow in the involved hemisphere of AVM patients.
- This technique shows potential for providing valuable insights into the natural history and characteristics of AVMs.
- Findings suggest differences in flow dynamics compared to subarachnoid hemorrhage from aneurysms.
Abstract:
Fifteen regional cerebral blood flow studies (rCBF) were conducted on 14 patients with arteriovenous malformations (AVM). Only one patient was studied at the time of a hemorrhage. None of the patients were operated upon. All patients had angiographically demonstrated lesions. All the CT scans performed demonstrated the lesions. rCBF was increased in the involved hemisphere compared to the non-involved hemisphere and the difference was greater when the malformations were superficial. There was a higher incidence of high flow regions in the involved hemisphere of patients with AVMs compared to our normal control group and patients with subarachnoid hemorrhage (SAH) from aneurysms. Flow rates within the involved hemisphere demonstrated abnormal distributions and greater variability than normals. Some peaks previously demonstrated in the intra-arterial flow studies are not apparent using the inhalation method. This non-invasive technique has a potential to provide additional useful information on the natural history of this disorder.
