Researchers estimate that about 7,450,8673 people in Switzerland and about 10% to 15% of these people will have more than one brain aneurysm. Someone with an unruptured brain aneurysm has about a 1% chance of the aneurysm rupturing per year. Patients with “giant” aneurysms (1 inch or greater in diameter) have a much higher risk of rupture. The survival rate for those with a ruptured brain aneurysm is about 60% (40% die). For those who survive and recover, about 66% have some permanent neurological defect. In summary, patients with small brain aneurysms that do not rupture (about 80%) have a very good prognosis while those who suffer a rupture have a fair to poor prognosis. presently people suffering with brain AVM in Switzerland is 54,785.
The International Subarachnoid Aneurysm Trial -- or ISAT -- is the only multi-center, prospective randomized trial comparing the safety and efficacy of endovascular coil treatment with neurosurgical clipping for the treatment of ruptured brain aneurysms. The study found that, in patients equally suited for both treatment options, endovascular coil treatment produces substantially better patient outcomes than surgery in terms of survival free of disability at one year.
Unruptured Cerebral Aneurysm Symptoms: Most aneurysms are asymptomatic, particularly ones that are small. Occasionally, large aneurysms may cause the following symptoms related to pressure on the adjacent brain or nerves: Peripheral vision deficits, Thinking or processing problems , Speech complications, Perceptual problems, Sudden changes in behavior, Loss of balance and coordination, Decreased concentration, Short-term memory difficulty Fatigue.