The different characteristic of magnetic resonance angiography of vertebral basilar artery between isolated vertigo and dizziness with ischemic stroke history

Objective To investigate the different characteristics of vertebral basilar artery between isolated vertigo and dizziness with ischemic stroke history by magnetic resonance angiography (MRA) information, and find the independent risk factors of isolated vertigo. Methods From January 2015 to January 2016, isolated vertigo patients from our department were enrolled in study group (vertigo group), and dizzy patients with ischemic stroke history in control group (dizziness group). The patient's general information, and the relevant vascula data of the MRA were statistically analyzed to find the risk factors. Results A total of 118 patients with isolated vertigo was enrolled in the vertigo group, and 74 patients with dizziness after ischemic stroke were used as a control group. There were significant statistical differences in mean diameter of the right vertebral artery, rate of stenosis of basilar artery, vertigo history, the left vertebral artery hypoplasia, basilar artery skewing, and basilar artery hypoplasia between two groups(P<0.05). Multivariate logistic regression analysis showed that vertigo history (P=0.049, OR=3.822, 95% CI=1.004~14.548), the right vertebral artery hypoplasia (P=0.001, OR=6.083, 95% CI=2.193~16.876), the left vertebral artery hypoplasia (P=0.006, OR=5.110, 95% CI=1.615~16.170), and mean diameter of the right vertebral artery (P=0.000, OR=3.143, 95% CI=1.724~5.730) were independent risk factors for isolated vertigo, and basilar artery skewing (P=0.018, OR=0.436, 95% CI=0.219~0.866), and degree of basilar artery stenosis (P=0.006, OR=0.634, 95% CI=0.459~0.877) were the protective factors. Conclusions The right vertebral artery hypoplasia, the left vertebral artery hypoplasia, and mean diameter of the right vertebral artery are independent risk factors for isolated vertigo. Basilar artery skewing and degree of basilar artery stenosis may be the protective factors Key words: Vertigo/RA; Stroke/CO; Dizziness/CO/RA; Vertebral artery/RA; Magnetic resonance angiography