World Library  


Add to Book Shelf
Flag as Inappropriate
Email this Book

Personal Exposure to Submicrometer Particles and Heart Rate Variability in Human Subjects

By Chuang, Kai-Jen

Click here to view

Book Id: WPLBN0000000385
Format Type: PDF eBook
File Size: 0.2 MB
Reproduction Date: 2005
Full Text

Title: Personal Exposure to Submicrometer Particles and Heart Rate Variability in Human Subjects  
Author: Chuang, Kai-Jen
Volume:
Language: English
Subject: Government publications, United Nations., United Nations. Office for Disarmament Affairs
Collections: Government Library Collection, Disarmament Documents
Historic
Publication Date:
Publisher: United Nations- Office for Disarmament Affairs (Unoda)

Citation

APA MLA Chicago

Chuang, K. J. (n.d.). Personal Exposure to Submicrometer Particles and Heart Rate Variability in Human Subjects. Retrieved from http://netlibrary.net/


Description
Government Reference Publication

Excerpt
Excerpt: We conducted a study on two panels of human subjects?9 young adults and 10 elderly patients with lung function impairments?to evaluate whether submicrometer particulate air pollution was associated with heart rate variability (HRV). We measured these subjects electrocardiography and personal exposure to number concentrations of submicrometer particles with a size range of 0.02?1 micrometer (NC0.02?1) continuously during daytime periods. We used linear mixed-effects models to estimate the relationship between NC0.02?1 and log10-transformed HRV, including standard deviation of all normal-to-normal intervals (SDNN), square root of the mean of the sum of the squares of differences between adjacent NN intervals (r-MSSD), low frequency (LF, 0.04?0.15 Hz), and high frequency (HF, 0.15?0.40 Hz), adjusted for age, sex, body mass index, tobacco exposure, and temperature. For the young panel, a 10,000-particle/cm3 increase in NC0.02?1 with 1?4 hr moving average exposure was associated with 0.68?1.35% decreases in SDNN, 1.85?2.58% decreases in r-MSSD, 1.32?1.61% decreases in LF, and 1.57?2.60% decreases in HF. For the elderly panel, a 10,000-particle/cm3 increase in NC0.02?1 with 1?3 hr moving average exposure was associated with 1.72?3.00% decreases in SDNN, 2.72?4.65% decreases in r-MSSD, 3.34?5.04% decreases in LF, and 3.61?5.61% decreases in HF. In conclusion, exposure to NC0.02?1 was associated with decreases in both time-domain and frequency-domain HRV indices in human subjects. Key words: air pollution, autonomic system, epidemiology, heart rate variability, submicrometer particle.

 

Click To View

Additional Books


  • Die Jugendlichen in der Sozial- und Krim... (by )
  • Prospects for Free and Fair Elections in... (by )
  • Social Work in the Churches : A Study in... (by )
  • An Introduction to Social Psychology (by )
  • Sie Müssen: Ein Offenes Wort an die Chri... (by )
  • Competitive Policy Council's Second Annu... (by )
  • Bolstering Defense Industrial Competitiv... (by )
  • Size Effects in the Three Dimensional Is... (by )
  • The Power of Our Words (by )
  • A History of Science (by )
  • Alice in Wonderland (by )
  • The History and Antiquities of Roxburghs... (by )
Scroll Left
Scroll Right

 



Copyright © World Library Foundation. All rights reserved. eBooks from World Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.