title: Severe Orthostatic Hypotension due to Unilateral Carotid Artery Dissection.
abstract: A 46-year-old woman was admitted to our hospital with mild right-sided hemiparesis and orthostatic hypotension. Magnetic resonance angiography of the neck showed stenosis of the left distal carotid sinus surrounded by intraluminal hyperintensities on both T1-weighted and T2-weighted images, representing a periluminal hematoma secondary to carotid artery dissection. The dissection hyper-extended the carotid artery wall and stimulated baroreceptors in the carotid sinus. The stimulated baroreceptors induced carotid sinus hypersensitivity, which may have been related to her orthostatic hypotension. Post-stroke orthostatic hypotension should prompt consideration of carotid artery dissection.
authors.affiliation: Division of Neurology, Respirology, Endocrinology and Metabolism, Department of Internal Medicine, University of Miyazaki , Japan.
authors.forename: Nobuyuki
authors.initials: N
authors.lastname: Ishii
authors.affiliation: Division of Neurology, Respirology, Endocrinology and Metabolism, Department of Internal Medicine, University of Miyazaki , Japan.
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Mochizuki
authors.affiliation: Division of Neurology, Respirology, Endocrinology and Metabolism, Department of Internal Medicine, University of Miyazaki , Japan.
authors.forename: Akitoshi
authors.initials: A
authors.lastname: Taniguchi
authors.affiliation: Division of Neurology, Respirology, Endocrinology and Metabolism, Department of Internal Medicine, University of Miyazaki , Japan.
authors.forename: Kazutaka
authors.initials: K
authors.lastname: Shiomi
authors.affiliation: Division of Neurology, Respirology, Endocrinology and Metabolism, Department of Internal Medicine, University of Miyazaki , Japan.
authors.forename: Masamitsu
authors.initials: M
authors.lastname: Nakazato
keywords: carotid artery dissection; carotid sinus hypersensitivity; infarction; orthostatic hypotension