Abstract: 【Objective】 To analyze risk factors of vascular form

aiming to study the relationship between variation of posterior communicating artery (PCoA) and posterior circulation infarction (PoCI). 【Methods】 This retrospective analysis contained a total of 776 patients from our hospital

the number of PoCI (research group) and non PoCI (control group) was 181 and 595

respectively. According to three dimensional time of magnetic resonance angiography (3D TOF MRA)

PCoA image characteristic can be divide to 4 clinical subtypes.Apply Logistic regression analysis risk factors of posterior circulation cerebral infarction

used clinical subtypes of PCoA

gender

age

hypertension

diabetes and hyperlipidemia as independent variables. 【Results】 The constituent ratio of PCoA clinical subtypes between research group and control group was statistically significant difference (P = 0.004). For the PoCI

hypertension (P < 0.001) and hyperlipidemia (P = 0.015)

as well as the clinical subtypes of PCoA (P = 0.010) are the risk factor. We further concluded that the clinical subtypes of PCoA

of which only type B (single or double sides of fetal origin of the posterior cerebral artery) as risk factor P = 0.040) that has more 65.4% risk of the PoCI than type D (neither has PCoA

nor fetal origin of the posterior cerebral artery). 【Conclusion】 Prevent of PoCI must be more actively if the fetal origin of the posterior cerebral artery was found.