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lüll Genetic aspects of vasovagal syncope: a systematic review of current evidence Olde Nordkamp LR; Wieling W; Zwinderman AH; Wilde AA; van Dijk NEuropace 2009[Apr]; 11 (4): 414-20Knowledge on the aetiology of vasovagal syncope (VVS) is of great importance to optimize its diagnostic and therapeutic options. To unravel the largely unknown pathophysiology, studies on genetic aspects of VVS can be of use. This systematic review on all available literature aims to provide an overview of the current knowledge of VVS genetics. The MEDLINE and EMBASE database were systematically searched for all studies discussing genetic factors as a cause of VVS. Hereditary aspects of VVS were studied in 19 studies. Six studies determined a positive family history in, respectively, 19-90% of the VVS patients. These numbers, however, are not higher than the cumulative incidence of VVS in the general population (35-39%). Four studies examined potential genetic polymorphisms associated with VVS. Only a Gly389 allele was more frequently present in VVS patients with a positive HUT test, although the significance level was set much higher than usual in genetic studies, and this result has not been replicated so far. Knowledge on genetic aspects of VVS could be very useful in clinical practice and research, but the current evidence that it has a genetic basis is not very strong.|Alleles[MESH]|Cluster Analysis[MESH]|Genetic Linkage/genetics[MESH]|Humans[MESH]|Polymorphism, Genetic/genetics[MESH]|Syncope, Vasovagal/*genetics[MESH] |