Whether or not a cerebral vascular venous malformation is serious depends on the actual situation. If it is a smaller cerebrovascular venous malformation, it may not cause serious effects. If it is a larger venous vessel that has a malformation, it may be more disruptive and prone to ischemia or bleeding.
In the case of small venous malformations in the brain, the interference is relatively small and does not affect the blood circulation of the brain tissue, which may not cause too much impact, and the probability of cerebral ischemia as well as cerebral hemorrhage is low.
If some large venous vessels in the brain have serious malformations, they may interfere with the blood flow, and when the interference is large, it may cause cerebral ischemia or cerebral hemorrhage, which may cause headache, dizziness, hemiplegia and other clinical symptoms, and the harm is more serious.
Therefore, when large cerebrovascular venous malformation is found, it is recommended to do further examination and treatment to avoid serious consequences.