뇌혈관 협착없이 기립성 저혈압에서 반복적으로 발생한 일과성 허혈발작
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The authors describe a patient with recurrent right side weakness during the attack of orthostatic hypotension. Neither acute nor chronic cerebral infarction was founded on brain MRI. On cerebral MR angiography, no evidence of symptomatic arterial occlusive disease was noted. Acetazolamide-SPECT revealed symmetric collateral reserves in both hemispheres. Transcranial Doppler sonography showed decline of blood flow velocities in all intracranial vessels during orthostasis but increase in the right anterior cerebral artery. These findings suggest an asymmetric failure of autoregulation was the cause of these stereotyped TIA. The patient was managed with nimodipine and barnidipine. Korean Jourmal of Stroke 2000;2(2): 225~227
Abstract
The authors describe a patient with recurrent right side weakness during the attack of orthostatic hypotension. Neither acute nor chronic cerebral infarction was founded on brain MRI. On cerebral MR angiography, no evidence of symptomatic arterial occlusive disease was noted. Acetazolamide-SPECT revealed symmetric collateral reserves in both hemispheres. Transcranial Doppler sonography showed decline of blood flow velocities in all intracranial vessels during orthostasis but increase in the right anterior cerebral artery. These findings suggest an asymmetric failure of autoregulation was the cause of these stereotyped TIA. The patient was managed with nimodipine and barnidipine. Korean Jourmal of Stroke 2000;2(2): 225~227