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There is only one study on the prevalence of cerebrovascular disease in Argentina, conducted in the city of Junín, with 79.6% ischemic events and 20.4% hemorrhagic reported events. Point prevalence ratio was 868.1 cases per 100000 inhabitants (473.4/100000 rate adjusted to the worldwide population). In both sexes, prevalence increased with age, and significant disability was reported in 52% of the cases. The data on the most prevalent vascular risk factors, the type of events, and the implementation of fibrinolytic therapy in ischemic stroke. The first registry was the ARENAS study, conducted for six months by the Stroke Council of the Argentine Society of Cardiology, with the participation of 84 centers throughout the country, including data from 1235 patients. The major risk factor was arterial hypertension (78.5%), followed by history of heart disease (34%), smoking (32%), dyslipidemia (31%), previous stroke (22%), diabetes (17%), and atrial fibrillation (15%).
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.