Journal ArticleDOI
Breath hold diving: in vivo model of the brain survival response in man?
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TLDR
It is hypothesized that adaptations to extended cessation of breathing ending with extreme hypoxia can be used as a model of brain survival response during conditions involving profound brain deoxygenation and in some instances reduced brain perfusion.About:
This article is published in Medical Hypotheses.The article was published on 2011-05-01. It has received 11 citations till now. The article focuses on the topics: Cerebral blood flow & Hypoxia (medical).read more
Citations
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Journal ArticleDOI
Regulation of brain blood flow and oxygen delivery in elite breath-hold divers
Christopher K. Willie,Philip N. Ainslie,Ivan Drvis,David B. MacLeod,Anthony R. Bain,Dennis Madden,Petra Zubin Maslov,Zeljko Dujic +7 more
TL;DR: Termination of apnea was not determined by reduced cerebral oxygen delivery; despite 40% to 50% reductions in arterial oxygen content, oxygen delivery was maintained by commensurately increased CBF.
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Impact of breath holding on cardiovascular respiratory and cerebrovascular health.
Zeljko Dujic,Toni Breskovic +1 more
TL;DR: This review focuses on recent advances in knowledge regarding possibly harmful physiological changes and/or potential health risks associated with breath-hold diving.
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Brain responses to emotional stimuli during breath holding and hypoxia: an approach based on the independent component analysis.
Danilo Menicucci,Fiorenzo Artoni,Remo Bedini,Alessandro Pingitore,Mirko Passera,Alberto Landi,Antonio L'Abbate,Laura Sebastiani,Angelo Gemignani,Angelo Gemignani +9 more
TL;DR: The reduction of unpleasant-related ERP components suggests that the evaluation of aversive and/or possibly dangerous situations might be altered during breath holding.
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Organ perfusion during voluntary pulmonary hyperinflation; a magnetic resonance imaging study
Kasper Kyhl,Ivan Drvis,Otto F. Barak,Tanja Mijacika,Thomas Engstrøm,Niels H. Secher,Zeljko Dujic,A. Buča,Per Lav Madsen +8 more
TL;DR: During pulmonary hyperinflation by GPI, CO and organ perfusion, including the myocardium, as well as perfusion of skeletal muscles, are reduced, and yet perfusions of the liver is maintained.
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Sports-related lung injury during breath-hold diving
Tanja Mijacika,Zeljko Dujic +1 more
TL;DR: The number of people practising recreational breath-hold diving is constantly growing, thereby increasing the need for knowledge of the acute and chronic effects such a sport could have on the health of participants, and according to the available data, breath-holding does not result in chronic lung injury.
References
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Journal ArticleDOI
The physiology and pathophysiology of human breath-hold diving.
TL;DR: A brief overview of physiological reactions, limitations, and pathophysiological mechanisms associated with human breath-hold divers can be found in this paper, where the authors also discuss the ability to withstand compressions.
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The human spleen during physiological stress.
TL;DR: The role of the spleen in sequestering 50% of the total red cell volume in seals and horses, during times of inactivity, dramatically reduces the viscosity of the blood and therefore the work of the heart.
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Extreme human breath-hold diving
TL;DR: It is revealed that in extreme divers, adaptive mechanisms take place that allow prolongation of apnoea beyond the limits attained by non-diving subjects, and preservation of oxygen stores during the dives, and the ultimate limit to breath-hold diving records may indeed be imposed by an energetic constraint.
The human spleen during physiological stress
TL;DR: The similarities between the human spleen and that of several athletic mammalian species during acute physiological stress are emphasised to emphasise the role of the spleen in sequestering 50% of the total red cell volume in seals and horses during times of inactivity.
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Spleen volume and blood flow response to repeated breath-hold apneas
Darija Bakovic,Zoran Valic,Davor Eterović,Ivica Vuković,Ante Obad,Ivana Marinović-Terzić,Zeljko Dujic +6 more
TL;DR: Results show rapid, probably active contraction of the spleen in response to breath-hold apnea in humans, and may contribute to prolongation of successive, briefly repeated apnea attempts.