Document Detail


Arterial pulse pressure and vasopressin release during graded water immersion in humans.
MedLine Citation:
PMID:  10848527     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Previous results indicate that arterial pulse pressure modulates release of arginine vasopressin (AVP) in humans. The hypothesis was therefore tested that an increase in arterial pulse pressure is the stimulus for suppression of AVP release during central blood volume expansion by water immersion. A two-step immersion model (n = 8) to the xiphoid process and neck, respectively, was used to attain two different levels of augmented cardiac distension. Left atrial diameter (echocardiography) increased from 28 +/- 1 to 34 +/- 1 mm (P < 0.05) during immersion to the xiphoid process and more so (P < 0.05), to 36 +/- 1 mm, during immersion to the neck. During immersion to the xiphoid process, arterial pulse pressure (invasively measured in a brachial artery) increased (P < 0.05) from 44 +/- 1 to 51 +/- 2 mmHg and to the same extent from 42 +/- 1 to 52 +/- 2 mmHg during immersion to the neck. Mean arterial pressure was unchanged during immersion to the xiphoid process and increased during immersion to the neck by 7 +/- 1 mmHg (P < 0.05). Arterial plasma AVP decreased from 2.5 +/- 0.7 to 1.8 +/- 0.5 pg/ml (P < 0. 05) during immersion to the xiphoid process and significantly more so (P < 0.05), to 1.4 +/- 0.5 pg/ml, during immersion to the neck. In conclusion, other factors besides the increase in arterial pulse pressure must have participated in the graded suppression of AVP release, comparing immersion to the xiphoid process with immersion to the neck. We suggest that when arterial pulse pressure is increased, graded distension of cardiopulmonary receptors modulate AVP release.
Authors:
A Gabrielsen; J Warberg; N J Christensen; P Bie; C Stadeager; B Pump; P Norsk
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  American journal of physiology. Regulatory, integrative and comparative physiology     Volume:  278     ISSN:  0363-6119     ISO Abbreviation:  Am. J. Physiol. Regul. Integr. Comp. Physiol.     Publication Date:  2000 Jun 
Date Detail:
Created Date:  2000-07-06     Completed Date:  2000-07-06     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  100901230     Medline TA:  Am J Physiol Regul Integr Comp Physiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  R1583-8     Citation Subset:  IM; S    
Affiliation:
Danish Aerospace Medical Centre of Research, National University Hospital, Rigshospitalet, Copenhagen, Denmark. pnorsk.damec@post.uni2.dk
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MeSH Terms
Descriptor/Qualifier:
Adult
Blood Pressure / physiology*
Body Temperature Regulation / physiology*
Cardiac Output / physiology
Humans
Male
Neck
Pressoreceptors / physiology
Sympathetic Nervous System / physiology*
Vasopressins / blood*
Water
Xiphoid Bone
Chemical
Reg. No./Substance:
11000-17-2/Vasopressins; 7732-18-5/Water

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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