Document Detail


The acute effects of smokeless tobacco on central aortic blood pressure and wave reflection characteristics.
MedLine Citation:
PMID:  20719817     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The main objectives of this study were to examine the acute effect of a single dose of smokeless tobacco (ST) on central aortic blood pressure and wave reflection characteristics. Fifteen apparently healthy male subjects (aged 30.6 ± 6.2 y) were given a 2.5 g oral dose of ST after baseline measurements were recorded. Pulse wave analysis using radial artery applanation tonometry was performed in triplicate at baseline (0 min) and at 10-min intervals during (10, 20 and 30 min) and after (40, 50 and 60 min) ST use. An acute dose of ST was associated with a significant increase in heart rate (HR), central aortic systolic and diastolic blood pressure, peripheral brachial systolic and diastolic blood pressure, and aortic augmentation index normalized to a fixed heart rate of 75 bpm (AIx@75). Furthermore, ejection duration and round trip travel time of the reflected pressure wave (Δt(p)) were significantly decreased as a result of one time ST use. As a result of changes in aortic pressure wave reflection characteristics, there was a significant increase in wasted left ventricular pressure energy (LVE(w)) and the tension-time index (TTI) as a result of ST use. In conclusion, one time use of ST elicits significant transient increases in HR, central aortic pressures, AIx@75, the TTI and LVE(w). Chronic users subjected to decades of elevated central pressures and left ventricular work may have an increased cardiovascular risk as central aortic pressures are even more strongly related to cardiovascular outcomes than peripheral blood pressures.
Authors:
Jeffrey S Martin; Darren T Beck; Alvaro N Gurovich; Randy W Braith
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Publication Detail:
Type:  Journal Article     Date:  2010-08-18
Journal Detail:
Title:  Experimental biology and medicine (Maywood, N.J.)     Volume:  235     ISSN:  1535-3699     ISO Abbreviation:  Exp. Biol. Med. (Maywood)     Publication Date:  2010 Oct 
Date Detail:
Created Date:  2010-09-30     Completed Date:  2010-10-28     Revised Date:  2013-05-28    
Medline Journal Info:
Nlm Unique ID:  100973463     Medline TA:  Exp Biol Med (Maywood)     Country:  England    
Other Details:
Languages:  eng     Pagination:  1263-8     Citation Subset:  IM    
Affiliation:
Center for Exercise Science, Department of Applied Physiology and Kinesiology, College of Health and Human Performance, University of Florida, P.O. Box 118206, Gainesville, FL 32611, USA. martin.jeff@hhp.ufl.edu
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MeSH Terms
Descriptor/Qualifier:
Adult
Aorta / physiology*
Blood Pressure / physiology*
Brachial Artery / physiology
Diastole
Heart Rate
Hemodynamics
Humans
Male
Risk Factors
Systole
Tobacco, Smokeless / toxicity*
Ventricular Function, Left
Young Adult
Grant Support
ID/Acronym/Agency:
T32 HL083810-04/HL/NHLBI NIH HHS
Comments/Corrections

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