alexa Physiologic Strain during Treadmill Electrocardiography in the Medical Evaluation of Candidates for Hazardous Materials Duty, with and without Added Heat Stress | Abstract
ISSN: 2165-7548

Emergency Medicine: Open Access
Open Access

OMICS International organises 3000+ Global Conferenceseries Events every year across USA, Europe & Asia with support from 1000 more scientific Societies and Publishes 700+ Open Access Journals which contains over 50000 eminent personalities, reputed scientists as editorial board members.

Open Access Journals gaining more Readers and Citations
700 Journals and 15,000,000 Readers Each Journal is getting 25,000+ Readers

This Readership is 10 times more when compared to other Subscription Journals (Source: Google Analytics)

Research Article

Physiologic Strain during Treadmill Electrocardiography in the Medical Evaluation of Candidates for Hazardous Materials Duty, with and without Added Heat Stress

Lawrence W Raymond*

Director of Occupational and Environmental Medicine, Carolinas Health Care System, Charlotte, NC, USA

*Corresponding Author:
W. Raymond L
Director of Occupational and Environmental Medicine
Carolinas Health Care System, Charlotte, NC
Professor of Family Medicine
University of North Carolina at Chapel Hill, USA
Tel: 704.641.5032
Fax: 704.304.7104
E-mail: [email protected]

Received Date: October 09, 2014; Accepted Date: October 28, 2014; Published Date: November 04, 2014

Citation : Raymond LW (2014) Physiologic Strain during Treadmill Electrocardiography in the Medical Evaluation of Candidates for Hazardous Materials Duty, with and without Added Heat Stress. Emerg Med (Los Angel) 4:224. doi:10.4172/2165-7548.1000224

Copyright: © 2014 W. Raymond L, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

added heat stress as part of medical evaluation for hazardous materials (hazmat) work requiring protective ensembles which block evaporative and convective heat transfer. Also, to extend comparison of PSI versus published values from hazmat simulations. Methods: Candidates for hazmat duty (N=203) underwent maximal, symptom-limited Bruce protocol treadmill electrocardiography (standard Bruce test wearing gym clothes, SBT) during which changes in tympanic temperature (TT) and heart rate (HR) enabled calculation of PSI. A subgroup of candidates (N=39) later performed a second Bruce test, wearing novel, inexpensive apparel chosen to impede dissipation of metabolic heat (Hot Bruce test, HBT). Thermal discomfort was gauged using the Young index (4, neutral; 8, maximal discomfort). Results: SBT duration was 12.2 ± 2.6 SD minutes and the rise in TT and PSI averaged 0.5 ± 0.4˚C and 5.9 ± 1.1, respectively. The rate of rise of TT was 0.038˚C per min. of treadmill exertion. In the subgroup of 39 candidates, HBT duration was 13.7 ± 3.3 min. (p>0.05). TT rose more after HBT than SBT: 1.3 ± 0.7˚C vs. 0.5 ± 0.4˚C (p<0.001). The rate of rise of TT during HBT was 0.10˚C per min. and was associated with greater physiological strain (PSI=7.4 vs. 6.2, p<0.001). The Young index was 6.2 ± 0.8 for SBT vs. 7.3 ± 0.6 (p<0.001) for HBT. Maximal heart rate was 181 bpm during both SBT and HBT. Conclusions: 1. The rate of rise of TT–0.038˚C per min. of SBT treadmill exertion -- is similar to that of two smaller studies, but less than the only other published report. 2. PSI during HBT exceeded that from SBT and was similar to PSI observed during hazmat simulations, suggesting that HBT, which also induced heavy sweating and thermal discomfort, may be more appropriate than SBT in the medical evaluation of hazmat candidates.

Keywords

Peer Reviewed Journals
 
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2018-19
 
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

Agri & Aquaculture Journals

Dr. Krish

[email protected]

1-702-714-7001Extn: 9040

Biochemistry Journals

Datta A

[email protected]

1-702-714-7001Extn: 9037

Business & Management Journals

Ronald

[email protected]

1-702-714-7001Extn: 9042

Chemistry Journals

Gabriel Shaw

[email protected]

1-702-714-7001Extn: 9040

Clinical Journals

Datta A

[email protected]

1-702-714-7001Extn: 9037

Engineering Journals

James Franklin

[email protected]

1-702-714-7001Extn: 9042

Food & Nutrition Journals

Katie Wilson

[email protected]

1-702-714-7001Extn: 9042

General Science

Andrea Jason

[email protected]

1-702-714-7001Extn: 9043

Genetics & Molecular Biology Journals

Anna Melissa

[email protected]

1-702-714-7001Extn: 9006

Immunology & Microbiology Journals

David Gorantl

[email protected]

1-702-714-7001Extn: 9014

Materials Science Journals

Rachle Green

[email protected]

1-702-714-7001Extn: 9039

Nursing & Health Care Journals

Stephanie Skinner

[email protected]

1-702-714-7001Extn: 9039

Medical Journals

Nimmi Anna

[email protected]

1-702-714-7001Extn: 9038

Neuroscience & Psychology Journals

Nathan T

[email protected]

1-702-714-7001Extn: 9041

Pharmaceutical Sciences Journals

Ann Jose

[email protected]

1-702-714-7001Extn: 9007

Social & Political Science Journals

Steve Harry

[email protected]

1-702-714-7001Extn: 9042

 
© 2008- 2018 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version
Leave Your Message 24x7