The vertebrobasilar arterial system perfuses (supply with fluid) the medulla, cerebellum, pons, midbrain, thalamus, and occipital cortex. When blood flow within the vertebrobasilar material system is interrupted, it can lead to a posterior circulation stroke (PCS), which accounts for 25 percent of all ischemic strokes.
These types of strokes are more uncommon and can lead to discrete non-stroke symptoms like vertigo and dizziness. Lack of proper diagnosis due to these confusing signs can increase risk of mortality.
The Stroke Association notes that sometimes these symptoms can emerge “weeks or months” before or after the event of stroke. When they occur before, they are a sign of transient ischaemic attack (TIA). A temporary disruption in the blood supply to a section of the brain can lead to a transient ischaemic attack (TIA). This results in a temporary lack of oxygen.