Document Detail

Influence of repetitive open sea dives and physical exercises on right-to-left shunting in healthy divers.
MedLine Citation:
PMID:  18065441     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: Paradoxical gas embolism through right-to-left (R/L) shunts is considered as a potential cause of certain types of decompression sickness.
AIM: To assess whether 4 months of repetitive diving and strenuous exercises would lead to an increased prevalence of R/L shunting in a group of military divers.
METHODS: Using a standardised contrast-enhanced transcranial Doppler technique, 17 divers were re-examined for the presence of a R/L shunt 4 months after their initial examinations. R/L shunts were classified as type I if observed only after a straining manoeuvre, and type II if present at rest.
RESULTS: Initial prevalence of R/L shunt was 41%: six type I shunts and one type II. At the second examination, prevalence was 47%, with the appearance of one type I shunt that was not previously present. We found no significant increase in the prevalence and size of R/L shunts.
CONCLUSION: It is speculated that diving-related phenomena, such as variations in right atrial pressures during the end stages of or events immediately after a dive could generate an R/L shunt. However, extreme conditions of repetitive diving and strenuous exercises do not cause permanent modification in R/L permeability over a period of 4 months.
J-E Blatteau; C Pény; J-M Pontier; E Gempp; P Louge
Publication Detail:
Type:  Journal Article     Date:  2007-12-07
Journal Detail:
Title:  British journal of sports medicine     Volume:  42     ISSN:  1473-0480     ISO Abbreviation:  Br J Sports Med     Publication Date:  2008 Nov 
Date Detail:
Created Date:  2008-11-07     Completed Date:  2009-04-06     Revised Date:  2010-12-16    
Medline Journal Info:
Nlm Unique ID:  0432520     Medline TA:  Br J Sports Med     Country:  England    
Other Details:
Languages:  eng     Pagination:  934-6     Citation Subset:  IM    
Département de Médecine Hyperbare, Hôpital d'instruction des armées Sainte-Anne, 83800 Toulon Armées, France.
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MeSH Terms
Decompression / adverse effects
Decompression Sickness / etiology*,  ultrasonography
Diving / physiology*
Embolism, Air / complications*,  ultrasonography
Embolism, Paradoxical / complications*,  ultrasonography
Exercise / physiology*
Foramen Ovale, Patent / complications
Military Personnel
Pulmonary Circulation / physiology*
Ultrasonography, Doppler, Transcranial
Erratum In:
Br J Sports Med. 2009 Apr;43(4):310-1

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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