Document Detail

Does thoracic pump influence the cerebral venous return?
MedLine Citation:
PMID:  22174396     Owner:  NLM     Status:  MEDLINE    
We assessed the hemodynamic effects induced by the thoracic pump in the intra- and extracranial veins of the cerebral venous system on healthy volunteers. Activation of the thoracic pump was standardized among subjects by setting the deep inspiration at 70% of individual vital capacity. Peak velocity (PV), time average velocity (TAV), vein area (VA), and flow quantification (Q) were assessed by means of echo color Doppler in supine posture. Deep respiration significantly increases PV, TAV, and Q, but it is limited to the extracranial veins. To the contrary, no significant hemodynamic changes were recorded at the level of the intracranial venous network. Moreover, at rest TAV in the jugular veins was significantly correlated with Q of the intracranial veins. We conclude that the modulation of the atmospheric pressure operated by the thoracic pump significantly modifies the hemodynamics of the jugular veins and of the reservoir of the neck and facial veins, with no effect on the vein network of the intracranial compartment.
Paolo Zamboni; Erica Menegatti; Luca Pomidori; Sandra Morovic; Angelo Taibi; Anna Maria Malagoni; Anna Luisa Cogo; Mauro Gambaccini
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Publication Detail:
Type:  Journal Article     Date:  2011-12-15
Journal Detail:
Title:  Journal of applied physiology (Bethesda, Md. : 1985)     Volume:  112     ISSN:  1522-1601     ISO Abbreviation:  J. Appl. Physiol.     Publication Date:  2012 Mar 
Date Detail:
Created Date:  2012-03-02     Completed Date:  2012-09-11     Revised Date:  2013-09-26    
Medline Journal Info:
Nlm Unique ID:  8502536     Medline TA:  J Appl Physiol (1985)     Country:  United States    
Other Details:
Languages:  eng     Pagination:  904-10     Citation Subset:  IM    
Vascular Diseases Center, University of Ferrara, Ferrara, Italy.
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MeSH Terms
Blood Flow Velocity / physiology
Cerebral Veins / physiology*
Cerebrovascular Circulation / physiology*
Hemodynamics / physiology
Jugular Veins / physiology
Posture / physiology
Thoracic Nerves / physiology*

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