𝐂𝐚𝐬𝐞 𝐬𝐭𝐮𝐝𝐲 176 - Vertebral artery dissection ⁣⁣⁣⁣ Vertebral artery dissection (VAD) occurs when the inner lining of the vertebral artery, which supplies blood to the brain, tears and blood enters the arterial wall. This can form a blood clot, thickening the artery wall and potentially blocking blood flow. VAD can have a range of causes, including trauma or spontaneous occurrence. Symptoms are often vague and nonspecific, including headaches, dizziness, vertigo, neck pain, or occipital p