Prioritized Brain Circulation During Ergometer Cycling with Apnea and Face Immersion in Ice-Cold Water: A Case Report
Lars J Bjertnaes,1,2 Anton Hauge,3 Marianne Thoresen,3,4 Lars Walløe3 1Anesthesia and Critical Care Research Group, Department of Clinical Medicine, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromsø, N-9037, Norway; 2Department of Intensive Care Medicine, University Hospital of...
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ftdoajarticles:oai:doaj.org/article:fa767862108e40f2a8464cfa1901a192 2023-05-15T17:39:25+02:00 Prioritized Brain Circulation During Ergometer Cycling with Apnea and Face Immersion in Ice-Cold Water: A Case Report Bjertnaes LJ Hauge A Thoresen M Walløe L 2021-09-01T00:00:00Z https://doaj.org/article/fa767862108e40f2a8464cfa1901a192 EN eng Dove Medical Press https://www.dovepress.com/prioritized-brain-circulation-during-ergometer-cycling-with-apnea-and--peer-reviewed-fulltext-article-IMCRJ https://doaj.org/toc/1179-142X 1179-142X https://doaj.org/article/fa767862108e40f2a8464cfa1901a192 International Medical Case Reports Journal, Vol Volume 14, Pp 675-681 (2021) apnea breath-hold cardiopulmonary resuscitation diving response hypothermia Medicine (General) R5-920 article 2021 ftdoajarticles 2022-12-31T07:43:19Z Lars J Bjertnaes,1,2 Anton Hauge,3 Marianne Thoresen,3,4 Lars Walløe3 1Anesthesia and Critical Care Research Group, Department of Clinical Medicine, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromsø, N-9037, Norway; 2Department of Intensive Care Medicine, University Hospital of North Norway, Tromsø, N- 9017, Norway; 3Division of Physiology, Institute of Basic Medical Sciences, University of Oslo, Oslo, 0317, Norway; 4Translational Health Sciences, University of Bristol, Bristol, UKCorrespondence: Lars J BjertnaesAnesthesia and Critical Care Research Group, Department of Clinical Medicine, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromsø, N-9037, NorwayTel +47 77627001Fax +47 77626042Email lars.bjertnaes@uit.noBackground: Successful cardiopulmonary resuscitation after drowning or avalanche is often attributed to hypothermia-induced decrease in metabolism, which adapts the oxygen demand to the amount supplied under cardiac compression. Four decades ago, we speculated if oxygen-sparing mechanisms like those found in marine mammals, may improve cerebral oxygenation during acute airway blockade in humans. We investigated hemodynamic changes during steady state ergometer cycling with intermittent periods of apnea and face immersion (AFI) in ice-cold water. During AFI, heart rate (HR) dropped by 58% whereas average blood velocity (ABV) determined by means of a Doppler ultrasound velocity meter (UNIDOP University of Oslo, Oslo, Norway) fell by 85% in the radial artery and rose by 67% in the vertebral artery. Similar changes occured in radial artery ABV, albeit more slowly, when the test subject only held his breath while cycling. When he breathed via a snorkel during face immersion, HR remained unchanged while radial artery ABV fell transiently and subsequently returned to its pre-immersion level. These findings later were confirmed by other investigators. Moreover, a recent study revealed that the seal even has a system for selective brain cooling during the dive.Conclusion: ... Article in Journal/Newspaper North Norway Tromsø Arctic University of Norway UiT The Arctic University of Norway Directory of Open Access Journals: DOAJ Articles Arctic Norway Tromsø |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
apnea breath-hold cardiopulmonary resuscitation diving response hypothermia Medicine (General) R5-920 |
spellingShingle |
apnea breath-hold cardiopulmonary resuscitation diving response hypothermia Medicine (General) R5-920 Bjertnaes LJ Hauge A Thoresen M Walløe L Prioritized Brain Circulation During Ergometer Cycling with Apnea and Face Immersion in Ice-Cold Water: A Case Report |
topic_facet |
apnea breath-hold cardiopulmonary resuscitation diving response hypothermia Medicine (General) R5-920 |
description |
Lars J Bjertnaes,1,2 Anton Hauge,3 Marianne Thoresen,3,4 Lars Walløe3 1Anesthesia and Critical Care Research Group, Department of Clinical Medicine, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromsø, N-9037, Norway; 2Department of Intensive Care Medicine, University Hospital of North Norway, Tromsø, N- 9017, Norway; 3Division of Physiology, Institute of Basic Medical Sciences, University of Oslo, Oslo, 0317, Norway; 4Translational Health Sciences, University of Bristol, Bristol, UKCorrespondence: Lars J BjertnaesAnesthesia and Critical Care Research Group, Department of Clinical Medicine, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromsø, N-9037, NorwayTel +47 77627001Fax +47 77626042Email lars.bjertnaes@uit.noBackground: Successful cardiopulmonary resuscitation after drowning or avalanche is often attributed to hypothermia-induced decrease in metabolism, which adapts the oxygen demand to the amount supplied under cardiac compression. Four decades ago, we speculated if oxygen-sparing mechanisms like those found in marine mammals, may improve cerebral oxygenation during acute airway blockade in humans. We investigated hemodynamic changes during steady state ergometer cycling with intermittent periods of apnea and face immersion (AFI) in ice-cold water. During AFI, heart rate (HR) dropped by 58% whereas average blood velocity (ABV) determined by means of a Doppler ultrasound velocity meter (UNIDOP University of Oslo, Oslo, Norway) fell by 85% in the radial artery and rose by 67% in the vertebral artery. Similar changes occured in radial artery ABV, albeit more slowly, when the test subject only held his breath while cycling. When he breathed via a snorkel during face immersion, HR remained unchanged while radial artery ABV fell transiently and subsequently returned to its pre-immersion level. These findings later were confirmed by other investigators. Moreover, a recent study revealed that the seal even has a system for selective brain cooling during the dive.Conclusion: ... |
format |
Article in Journal/Newspaper |
author |
Bjertnaes LJ Hauge A Thoresen M Walløe L |
author_facet |
Bjertnaes LJ Hauge A Thoresen M Walløe L |
author_sort |
Bjertnaes LJ |
title |
Prioritized Brain Circulation During Ergometer Cycling with Apnea and Face Immersion in Ice-Cold Water: A Case Report |
title_short |
Prioritized Brain Circulation During Ergometer Cycling with Apnea and Face Immersion in Ice-Cold Water: A Case Report |
title_full |
Prioritized Brain Circulation During Ergometer Cycling with Apnea and Face Immersion in Ice-Cold Water: A Case Report |
title_fullStr |
Prioritized Brain Circulation During Ergometer Cycling with Apnea and Face Immersion in Ice-Cold Water: A Case Report |
title_full_unstemmed |
Prioritized Brain Circulation During Ergometer Cycling with Apnea and Face Immersion in Ice-Cold Water: A Case Report |
title_sort |
prioritized brain circulation during ergometer cycling with apnea and face immersion in ice-cold water: a case report |
publisher |
Dove Medical Press |
publishDate |
2021 |
url |
https://doaj.org/article/fa767862108e40f2a8464cfa1901a192 |
geographic |
Arctic Norway Tromsø |
geographic_facet |
Arctic Norway Tromsø |
genre |
North Norway Tromsø Arctic University of Norway UiT The Arctic University of Norway |
genre_facet |
North Norway Tromsø Arctic University of Norway UiT The Arctic University of Norway |
op_source |
International Medical Case Reports Journal, Vol Volume 14, Pp 675-681 (2021) |
op_relation |
https://www.dovepress.com/prioritized-brain-circulation-during-ergometer-cycling-with-apnea-and--peer-reviewed-fulltext-article-IMCRJ https://doaj.org/toc/1179-142X 1179-142X https://doaj.org/article/fa767862108e40f2a8464cfa1901a192 |
_version_ |
1766140174544142336 |