Hypocapnia and Cerebral Hypoperfusion in Orthostatic Intolerance | Zendy

Vera Novak | Zendy; Judith Spies | Zendy; Péter Novák | Zendy; Benjamin R. McPhee | Zendy; Teresa A. Rummans | Zendy; Phillip A. Low | Zendy

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Hypocapnia and Cerebral Hypoperfusion in Orthostatic Intolerance

Author(s) -

Vera Novak,

Judith Spies,

Péter Novák,

Benjamin R. McPhee,

Teresa A. Rummans,

Phillip A. Low

Publication year - 1998

Publication title -

stroke

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.397

H-Index - 319

eISSN - 1524-4628

pISSN - 0039-2499

DOI - 10.1161/01.str.29.9.1876

Subject(s) - medicine , orthostatic intolerance , hypocapnia , hyperventilation , anesthesia , cardiology , orthostatic vital signs , supine position , heart rate , blood pressure , vascular resistance , cerebral blood flow , cerebral autoregulation , hypercapnia , respiratory system , autoregulation

Orthostatic and other stresses trigger tachycardia associated with symptoms of tremulousness, shortness of breath, dizziness, blurred vision, and, often, syncope. It has been suggested that paradoxical cerebral vasoconstriction during head-up tilt might be present in patients with orthostatic intolerance. We chose to study middle cerebral artery (MCA) blood flow velocity (BFV) and cerebral vasoregulation during tilt in patients with orthostatic intolerance (OI).

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