Stanislav Šutovský1, Andrej Blaho1, Branislav Kollár1, Pavol Šiarnik1, Adriana Reptová2, Katarína Klobučníková1, Peter Turčáni1
Subarachnoid haemorrhage belongs to the acute conditions in neurology. It accounts for 1,5 - 7 % of the cases of strokes. The incidence of SAH is according to AHA/ASA guidelines aproximetelly 2-16 per 100 000 and year with interethnical differences. Of all SAH cases 75-80 % fall on aneurysmal bleeding. Prevalence of aneurysms in the adult population is estimated from 2 to 5 %. Intracranial aneurysm is a complex disease with both genetic and enviromental risk factors contributing to the etiology of the disease. According to recent knowledge family connected occurrence of aneurysms is higher than has been expected. One of the reasons is heterogeneity of genetic background and inconstant phenotypic presentation in a sense of aneurysmal rupture in sustainable pedigree. Another cause of non-identification of family occurrence of aneurysms is a fact, that in the time of aneurysmal rupture in one family member his/her sibling does not need to be affected. In our article we summarize the current view on the genetic background of intracranial aneurysms and take a look at the variability of phenotypic presentation. We also analyze the interethnical differences in underlying polymorphisms and mutations as well as different clinical manifestations of the aneurysms based on their localization.