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Duplex Ultrasonography-Detected Positional Vertebral Artery Occlusion in Upper Cervical Rheumatoid Arthritis
Study Design. Prospective imaging study. Objective. To clarify the frequency of positional vertebral artery (VA) occlusion using duplex ultrasonography in patients with rheumatoid arthritis (RA). Summary of Background Data. Some patients with upper cervical RA develop thromboembolic stroke related to positional and transient VA occlusions; however, whether RA patients have positional VA occlusion without neurological symptoms is unclear. Methods. Outpatients with RA were enrolled. Clinical data were collected, and radiograph examinations were performed to measure the anterior atlantodental interval (AADI), the posterior at...
Source: Spine - December 21, 2015 Category: Orthopaedics Tags: Cervical Spine Source Type: research

Rheumatoid Arthritis–Induced Lateral Atlantoaxial Subluxation With Multiple Vertebrobasilar Infarctions
Conclusion. In patients with RA, the potential risk of AAS should be recognized. Lateral AAS in particular may induce cerebral ischemia by positional VA occlusion in advanced stages of the disease. Level of Evidence: N/A
Source: Spine - January 31, 2015 Category: Orthopaedics Tags: Case Report Source Type: research