Abstract: Objective To observe the effects of electric stimulation on mastoidea in the patients with ischemic stroke by transcranial Doppler sonography (TCD) and brainstem auditory evoked potentials (BAEP).Methods 40 patients with ischemic stroke were equally divided into two groups, i.e., observation group (20 cases) and control group(20 cases). The two groups received routine treatment, while the observation group added electrical stimulation on mastoidea. The blood flow vecolity of anterior cerebral artery (ACA), middle cerebral artery (MCA), posterior cerebral artery (PCA), vetebral artery (VA) and basilar artery (BA), and the peak latency(PL) of wavesⅠ, Ⅲ and Ⅴ, and inter-peak latency(IPL) of Ⅰ-Ⅲ and III-V were examined by TCD and BAEP before and 2 weeks after treatment.Results The blood flow velocity in the observation group accelerated after treatment compared to pre-treatment(P<0.05). Compared with the control group, the blood flow velocity in the observation group accelerated more markedly(P<0.001). The nerve conduction in both groups improved after treatment. After treatment, PL of waves I, Ⅲ and V, and IPL of I-Ⅲ, III-V and III-V/I-Ⅲ in the observation group improved more significantly than the control group(P<0.05). Conclusion Electric stimulation on mastoidea can enhance the blood flow velocity of brain and the function of brainstem nerve conduction in patients with ischemic stroke.

Key words: electrical stimulation, ischemic stroke, transcranial Doppler sonography, brainstem auditory evoked potentials