Work

Pathophysiological basis of orthostatic hypotension in autonomic failure

Year: 1999

Type: review

Abstract: In patients with autonomic failure orthostatic hypotension results from an impaired capacity to increase vascular resistance during standing. This fundamental defect leads to increased downward pooling of venous blood and a consequent reduction in stroke volume and cardiac output that exaggerates the orthostatic fall in blood pressure. The location of excessive venous blood pooling has not been established so far, but present data suggest that the abdominal compartment and perhaps leg skin vasculature are the most likely candidates. To improve the orthostatic tolerance in patients with autonomic failure, protective measures that reduce excessive orthostatic blood pooling have been developed and evaluated. These measures include physical counter-manoeuvres and abdominal compression.

Source: The Journal of Physiology

DOI: 10.1111/j.1469-7793.1999.0001o.x

Authors: Adrianus A. J. Smit, John R. Halliwill, Phillip A. Low, Wouter Wieling

Institutions: Amsterdam UMC Location University of Amsterdam, University of Amsterdam, University of Rochester, Mayo Clinic

Language: English

Topic: Cardiovascular Syncope and Autonomic Disorders

Subfield: Cardiology and Cardiovascular Medicine

Field: Medicine

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: green

Funder: National Aeronautics and Space Administration