Display Settings:

Format

Send to:

Choose Destination
See comment in PubMed Commons below
J Am Coll Cardiol. 2012 May 22;59(21):1908-13. doi: 10.1016/j.jacc.2012.02.025.

The exposure-dependent effects of aged secondhand smoke on endothelial function.

Author information

  • 1Division of Cardiology, San Francisco General Hospital, San Francisco, CA 94110, USA.

Abstract

OBJECTIVES:

The aim of this study was to investigate whether exposure to a range of relatively low concentrations of aged secondhand smoke (SHS), similar to those encountered commonly in the community, would impair endothelial function in a concentration-dependent manner.

BACKGROUND:

Exposure to SHS impairs endothelial function in humans. The concentration-dependent relationship for aged SHS effects on endothelial function after an exposure of short duration is unknown.

METHODS:

Thirty-three healthy nonsmokers were exposed to 1 of 2 low levels of aged SHS or to conditioned filtered air for 30 min. The primary end point was change in maximal percent brachial artery flow-mediated dilation after exposure.

RESULTS:

In a linear regression model for each increase in SHS exposure by 100 μg/m(3) respirable suspended particles, the absolute maximal percent brachial artery flow-mediated dilation was reduced by 0.67%. We did not find evidence of a threshold for the effect of SHS on flow-mediated dilation.

CONCLUSIONS:

Short-term exposure to real-world levels of aged SHS for 30 min resulted in a concentration-dependent decrease in endothelial function as measured by flow-mediated dilation.

Copyright © 2012 American College of Cardiology Foundation. Published by Elsevier Inc. All rights reserved.

PMID:
22595411
[PubMed - indexed for MEDLINE]
Free full text
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Icon for Elsevier Science
    Loading ...
    Write to the Help Desk