Changes in cerebral blood flow in patient with orthostatic hypotension(report of one case)

VernacularTitle:体位性低血压患者的脑血流改变(附1例报告)
Author: Jinhua ZHANG ^{1
,

2} ; Hanyu XUE ; Junhua YANG
Author Information

1. 475000 开封市中心医院康复医学科
2. 武汉顾连康复医院
Keywords: orthostatic hypotension; cervical spinal cord injury; TCD; cerebral vascular; autoregulation
From: Journal of Clinical Neurology 2024;37(3):213-216
CountryChina
Language:Chinese
Abstract: Objective To explore the autoregulation mechanism of cerebral blood flow in a patient with asymptomatic orthostatic hypotension after cervical spinal cord injury.Methods The patient underwent an upright tilt experiment to measure brachial artery blood pressure,cerebral blood flow parameters were monitored by TCD,and cerebral vascular resistance(CVR)was calculated.Results The data showed that the patient's blood pressure,right middle cerebral artery systolic peak flow velocity(Vs),end diastolic blood flow velocity(Vd),mean blood flow velocity(Vm),pulsatile index(PI),and CVR were normal in the supine position.However,when tilted at 30°,60°,and 90°,blood pressure,Vs,Vd,Vm,and CVR decreased,while PI increased.Conclusion When the patient with asymptomatic orthostatic hypotension after cervical spinal cord injury experiences with orthostatic hypotension,the cerebral vascular constricts and cerebral blood flow reduces.