The Pathophysiology of Orthostatic Hypotension
Conditions
- Autonomic Nervous System Diseases
- Orthostatic Hypotension
- Dopamine Beta-Hydroxylase Deficiency
- Orthostatic Intolerance
Interventions
- PROCEDURE: Standing or upright tilt
- PROCEDURE: Microneurography
- PROCEDURE: QSweat
- DEVICE: neck cuff stimulation
- DRUG: phenylephrine,isoproterenol,nitroprusside,propranolol,edrophonium,atropine,tyramine
- DRUG: clonidine,yohimbine,metoclopramide,alpha-methyldopa
- PROCEDURE: BodPod
- PROCEDURE: Eye exam
- PROCEDURE: Sleep study
- PROCEDURE: Pain response testing
- PROCEDURE: Metabolic chamber
- PROCEDURE: Brain function studies
- PROCEDURE: Bicycle Exercise Test
Sponsor
Vanderbilt University Medical Center