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Hypoxic syncope in a competitive breath-hold diver with elevation of the brain damage marker S100B.

Linér, Mats LU and Andersson, Johan LU (2009) In Aviation, Space and Environmental Medicine 80(12). p.1066-1068
Abstract
INTRODUCTION: Competitive breath-hold divers can accomplish previously unbelievable performances; e.g., the current world record for apnea during rest ("static apnea") is 11 min 35 s. However, whether such performances are associated with a risk for hypoxic brain damage has not been established. CASE REPORT: A breath-hold diver's competitive performance resulted in a loss of consciousness, after which he was subjected to a medical examination by the event physician. Blood samples were collected for analysis of the brain damage marker S100B in serum. The S100B in serum was 0.100 microg x L(-1) in the blood sample collected 15 min after the loss of consciousness. At 1 and 5 d after the incident it was 0.097 microg x L(-1) and 0.045 microg x... (More)
INTRODUCTION: Competitive breath-hold divers can accomplish previously unbelievable performances; e.g., the current world record for apnea during rest ("static apnea") is 11 min 35 s. However, whether such performances are associated with a risk for hypoxic brain damage has not been established. CASE REPORT: A breath-hold diver's competitive performance resulted in a loss of consciousness, after which he was subjected to a medical examination by the event physician. Blood samples were collected for analysis of the brain damage marker S100B in serum. The S100B in serum was 0.100 microg x L(-1) in the blood sample collected 15 min after the loss of consciousness. At 1 and 5 d after the incident it was 0.097 microg x L(-1) and 0.045 microg x L(-1) respectively. DISCUSSION: The elevated level of S100B, close to the upper reference limit (0.105 microg x L(-1)) indicates that the incident affected the integrity of the central nervous system. Even though this case does not establish that hypoxic brain damage is an inherent risk with loss of consciousness in competitive breathhold diving, the observation raises concerns. We suggest that it should be considered that repetitive exposures to prolonged apneas leading to severe hypoxia may be associated with negative long-term effects. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Aviation, Space and Environmental Medicine
volume
80
issue
12
pages
1066 - 1068
publisher
Aerospace Medical Association
external identifiers
  • wos:000272632400013
  • scopus:77649209555
ISSN
1943-4448
DOI
10.3357/ASEM.2554.2009
language
English
LU publication?
yes
id
f73b48d5-4f50-45bc-add5-e97f03cfba4d (old id 1523393)
alternative location
http://www.ncbi.nlm.nih.gov/pubmed/20027857?dopt=Abstract
date added to LUP
2010-01-12 12:42:00
date last changed
2017-09-10 03:33:40
@article{f73b48d5-4f50-45bc-add5-e97f03cfba4d,
  abstract     = {INTRODUCTION: Competitive breath-hold divers can accomplish previously unbelievable performances; e.g., the current world record for apnea during rest ("static apnea") is 11 min 35 s. However, whether such performances are associated with a risk for hypoxic brain damage has not been established. CASE REPORT: A breath-hold diver's competitive performance resulted in a loss of consciousness, after which he was subjected to a medical examination by the event physician. Blood samples were collected for analysis of the brain damage marker S100B in serum. The S100B in serum was 0.100 microg x L(-1) in the blood sample collected 15 min after the loss of consciousness. At 1 and 5 d after the incident it was 0.097 microg x L(-1) and 0.045 microg x L(-1) respectively. DISCUSSION: The elevated level of S100B, close to the upper reference limit (0.105 microg x L(-1)) indicates that the incident affected the integrity of the central nervous system. Even though this case does not establish that hypoxic brain damage is an inherent risk with loss of consciousness in competitive breathhold diving, the observation raises concerns. We suggest that it should be considered that repetitive exposures to prolonged apneas leading to severe hypoxia may be associated with negative long-term effects.},
  author       = {Linér, Mats and Andersson, Johan},
  issn         = {1943-4448},
  language     = {eng},
  number       = {12},
  pages        = {1066--1068},
  publisher    = {Aerospace Medical Association},
  series       = {Aviation, Space and Environmental Medicine},
  title        = {Hypoxic syncope in a competitive breath-hold diver with elevation of the brain damage marker S100B.},
  url          = {http://dx.doi.org/10.3357/ASEM.2554.2009},
  volume       = {80},
  year         = {2009},
}