Document Detail


Measurements of vascular function using strain-gauge plethysmography: technical considerations, standardization, and physiological findings.
MedLine Citation:
PMID:  14512279     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The main purpose of the present study was to examine the relationships between measures of fitness [estimated peak oxygen consumption (V(O2) peak) and handgrip strength] and forearm vascular function in 55 young (22.6 +/- 3.5 yr) adults. In addition, the present study considered methodological and technical aspects regarding the examination of the venous system using mercury in-Silastic strain-gauge plethysmography (MSGP). Forearm venous capacitance and outflow were examined using five different [7, 14, 21, 28, and 35 mmHg < diastolic blood pressure (DBP)] venous occlusion pressures and after a 5- and 10-min period of venous occlusion. A pressure of 7 mmHg < DBP and a period of 10 min venous occlusion produced the greatest (P < 0.05) venous capacitance and outflow, without altering arterial indexes. Reproducibility of forearm arterial and venous indexes were evaluated at rest and after 5 min of upper arm arterial occlusion at 240 mmHg on three different occasions within 10 days with the interclass correlation coefficient ranging from 0.70 and 0.94. Estimated V(O2) peak correlated with postocclusion arterial inflow (r = 0.54, P = 0.012) and resting venous outflow (r = 0.56, P = 0.016). Finally, handgrip strength was associated with venous capacitance (r = 0.57, P = 0.007) and outflow (r = 0.67, P = 0.001). These results indicate that the examination of forearm vascular function using MSGP is reproducible. Moreover, the data show the importance of careful consideration of the selection of venous occlusion pressure and period when implementing these measures in longitudinal trials. Finally, the associations between fitness and venous measures suggest a link between venous function and exercise performance.
Authors:
Mahmoud A Alomari; Angela Solomito; Rafael Reyes; Syed Muaz Khalil; Robert H Wood; Michael A Welsch
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Publication Detail:
Type:  Journal Article     Date:  2003-09-25
Journal Detail:
Title:  American journal of physiology. Heart and circulatory physiology     Volume:  286     ISSN:  0363-6135     ISO Abbreviation:  Am. J. Physiol. Heart Circ. Physiol.     Publication Date:  2004 Jan 
Date Detail:
Created Date:  2003-12-19     Completed Date:  2004-02-20     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  100901228     Medline TA:  Am J Physiol Heart Circ Physiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  H99-H107     Citation Subset:  IM    
Affiliation:
Department of Kinesiology, Louisiana State University, Baton Rouge, LA 70803, USA. mwelsch@lsu.edu
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MeSH Terms
Descriptor/Qualifier:
Adult
Arteries / physiology*
Blood Pressure
Constriction
Female
Forearm / blood supply
Hand Strength
Humans
Male
Oxygen Consumption
Physical Fitness
Plethysmography / methods
Reproducibility of Results
Veins / physiology*
Comments/Corrections
Comment In:
Am J Physiol Heart Circ Physiol. 2004 Aug;287(2):H981   [PMID:  15277210 ]

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


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