Flow void in basilar artery (T2-weighted MRIs)

TIAs (vertebrobasilar)

Transient ischemic attacks (TIAs) in the vertebrobasilar arterial system comprise one fourth of all TIAs and carry a higher risk of acute stroke than carotid territory TIAs. Vertebrobasilar TIAs often present with unilateral motor or sensory symptoms involving the face or limbs as well as unilateral or bilateral visual field defects. Vertebrobasilar TIAs may be accompanied by vertigo, diplopia, dysarthria, dysphagia, or loss of balance, often in association with any combination of motor or sensory deficits in the face and extremities.