2Antonio G,Hermosillo,José LJ,et al.Cerebrovascular blood flow during the near syncopal phase of head-up tilt test:a comparative study in different types of neurally mediated syncope[J].Europace,2006,8(3):199-203.
3Eckberg,David,Gilligan M,et al.Cerebral blood flow velocity declines before arterial pressure in patients with orthostatic vasovagal presyncope[J].JACC,2002,39:1039-1045.