| Effects of head and body cooling on hemodynamics during immersed prone exercise at 1 ATA. | |
| | |
MedLine Citation:
|
PMID: 19023017 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Immersion pulmonary edema (IPE) is a condition with sudden onset in divers and swimmers suspected to be due to pulmonary arterial or venous hypertension induced by exercise in cold water, although it does occur even with adequate thermal protection. We tested the hypothesis that cold head immersion could facilitate IPE via a reflex rise in pulmonary vascular pressure due solely to cooling of the head. Ten volunteers were instrumented with ECG and radial and pulmonary artery catheters and studied at 1 atm absolute (ATA) during dry and immersed rest and exercise in thermoneutral (29-31 degrees C) and cold (18-20 degrees C) water. A head tent varied the temperature of the water surrounding the head independently of the trunk and limbs. Heart rate, Fick cardiac output (CO), mean arterial pressure (MAP), mean pulmonary artery pressure (MPAP), pulmonary artery wedge pressure (PAWP), and central venous pressure (CVP) were measured. MPAP, PAWP, and CO were significantly higher in cold pool water (P < or = 0.004). Resting MPAP and PAWP values (means +/- SD) were 20 +/- 2.9/13 +/- 3.9 (cold body/cold head), 21 +/- 3.1/14 +/- 5.2 (cold/warm), 14 +/- 1.5/10 +/- 2.2 (warm/warm), and 15 +/- 1.6/10 +/- 2.6 mmHg (warm/cold). Exercise values were higher; cold body immersion augmented the rise in MPAP during exercise. MAP increased during immersion, especially in cold water (P < 0.0001). Except for a transient additive effect on MAP and MPAP during rapid head cooling, cold water on the head had no effect on vascular pressures. The results support a hemodynamic cause for IPE mediated in part by cooling of the trunk and extremities. This does not support the use of increased head insulation to prevent IPE. |
| | |
Authors:
|
T E Wester; A D Cherry; N W Pollock; J J Freiberger; M J Natoli; E A Schinazi; P O Doar; A E Boso; E L Alford; A J Walker; D M Uguccioni; D Kernagis; R E Moon |
Related Documents
:
|
2817597 - Effect of a leukotriene antagonist, ly171883, on cold air-induced bronchoconstriction i... 87077 - Oral photochemotherapy in lichen planus (lp) and mycosis fungoides (mf): ultrastructura... 2123177 - Effect of inspired air temperature on genioglossus activity during nose breathing in aw... 17095937 - American college of sports medicine position stand: prevention of cold injuries during ... 7600837 - Effect of epinephrine on oxygen consumption and delivery during progressive hemorrhage. 8925427 - Energy cost and thermoregulation of unrestrained rats during exercise in the cold. |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2008-11-20 |
Journal Detail:
|
Title: Journal of applied physiology (Bethesda, Md. : 1985) Volume: 106 ISSN: 8750-7587 ISO Abbreviation: J. Appl. Physiol. Publication Date: 2009 Feb |
Date Detail:
|
Created Date: 2009-02-06 Completed Date: 2009-03-12 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 8502536 Medline TA: J Appl Physiol Country: United States |
Other Details:
|
Languages: eng Pagination: 691-700 Citation Subset: IM |
Affiliation:
|
Department of Anesthesiology, Duke University Medical Center, Durham, NC 27710, USA. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Adult Atmospheric Pressure Body Temperature Regulation* Carbon Dioxide / blood Cardiac Output Central Venous Pressure Cold Temperature* Diving / adverse effects* Exercise* Extremities Female Head Heart Rate Hemodynamics* Humans Immersion* Male Middle Aged Oxygen / blood Pulmonary Circulation Pulmonary Edema / blood, etiology*, physiopathology Pulmonary Wedge Pressure Respiration Water* Young Adult |
| Chemical | |
Reg. No./Substance:
|
124-38-9/Carbon Dioxide; 7732-18-5/Water; 7782-44-7/Oxygen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Effect of acute resistance exercise and sex on human patellar tendon structural and regulatory mRNA ...
Next Document: Cardiorespiratory interactions in patients with atrial flutter.