Vascular Compression Syndrome: Dizziness Triggered by Arm Elevation

Diagnostic Considerations

The American Academy of Otolaryngology-Head and Neck Surgery suggests that BPPV causes brief spinning episodes (<1 minute) triggered by head position changes, not arm elevation 1, 2
Vestibular neuritis presents with continuous severe vertigo lasting days, not brief episodes with arm movements, according to the American Academy of Otolaryngology-Head and Neck Surgery 3
The American College of Radiology recommends that patients with new-onset severe headache with dizziness, or additional neurological symptoms, require immediate vascular assessment 5, 6

The Journal of the American College of Radiology suggests that MRA (magnetic resonance angiography) of the head and neck is the appropriate initial imaging to evaluate vertebrobasilar circulation 6
The American Academy of Otolaryngology-Head and Neck Surgery recommends against pursuing Dix-Hallpike maneuvers or vestibular testing, as the trigger is arm position, not head position 1, 2

The American College of Radiology states that any additional neurological symptoms, including limb weakness, visual changes, dysarthria, or dysphagia, require immediate vascular assessment 5, 6
Severe postural instability or falling during episodes is a critical red flag, according to the American College of Radiology 5, 6