There is a complex interaction between the heart and the lungs. We report on a healthy female who performs breath hold diving at a high, international level. In order to optimize pressure equalization during diving and to increase oxygen available, apneists employed a special breathing maneuver, so called "lung packing". Based on cardiac MRI we could demonstrate impressive effects of this maneuver on left ventricular geometry and hemodynamics. Beyond the fact, that our findings support the concept of pulmonary -cardiac interrelationship, it should be emphasized, that the reported, extreme breathing maneuver could have detrimental consequences due to reduction of stroke volume and cardiac output.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4681964 | PMC |
| http://dx.doi.org/10.1016/j.rmcr.2015.09.007 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Impact of glossopharyngeal insufflation and complete exhalation on breath-hold performance and physiological parameters in elite skin divers.
Eur J Appl Physiol
October 2024
Section of Sport Medicine & Biology of Exercise, School of Physical Education and Sports Science, National and Kapodistrian University of Athens, Ethnikis Antistasis 41, 17237, Daphni, Greece.
Purpose: This study examined the physiological responses of ten elite divers to normal breathing (BHn), glossopharyngeal inhalation (BHi), and complete exhalation (BHe) prior to five maximal breath-hold (BH) efforts.
Methods: Breath-hold time (BHT), hemological variables, mean arterial pressure (MAP), other hemodynamic indices, and diaphragmatic activity (DA) were recorded. During BHs, phases were identified as easy-going (EPh: minimal DA), struggling (SPh: increased DA), PhI (MAP transition), PhII (MAP stabilization), and PhIII (steep MAP increase).
The effect of breathing technique on sticking region during maximal bench press.
Biol Sport
September 2021
Faculty of Physical Education and Sport, Charles University, Prague, Czech Republic.
The intrathoracic pressure and breathing strategy on bench press (BP) performance is highly discussed in strength competition practice. Therefore, the purpose of this study was to analyze whether different breathing techniques can influence the time and track characteristics of the sticking region (SR) during the 1RM BP exercise. 24 healthy, male adults (age 23 ± 2.
View Article and Find Full Text PDFDietary nitrate enhances arterial oxygen saturation after dynamic apnea.
Scand J Med Sci Sports
June 2017
Department of Health Sciences, Mid Sweden University, Östersund, Sweden.
Breath-hold divers train to minimize their oxygen consumption to improve their apneic performance. Dietary nitrate has been shown to reduce the oxygen cost in a variety of situations, and our aim was to study its effect on arterial oxygen saturation (SaO ) after dynamic apnea (DYN) performance. Fourteen healthy male apnea divers (aged 33 ± 11 years) received either 70 mL of concentrated nitrate-rich beetroot juice (BR) or placebo (PL) on different days.
View Article and Find Full Text PDF"Lung packing" in breath hold-diving: An impressive case of pulmo-cardiac interaction.
Respir Med Case Rep
January 2016
Department of Cardiology, Pneumology and Int. Care Medicine, St. Vincenz Hospital Limburg, Auf dem Schafsberg, D-65549 Limburg, Germany.
There is a complex interaction between the heart and the lungs. We report on a healthy female who performs breath hold diving at a high, international level. In order to optimize pressure equalization during diving and to increase oxygen available, apneists employed a special breathing maneuver, so called "lung packing".
View Article and Find Full Text PDFGlossopharyngeal insufflation and breath-hold diving: the more, the worse?
Wilderness Environ Med
December 2014
UMR-MD2, French Armed Biomedical Research Institute, IRBA, Brétigny sur Orge, and Aix-Marseille University, Marseille, France (Drs Boussuges, Bessereau, Coulange, and Rossi); Internal Medicine Department, Hôpital Nord, Assistance Publique-Hôpitaux de Marseille, Marseille, France (Dr Rossi).
Objective: The glossopharyngeal insufflation maneuver (lung packing) is largely performed by competitive breath-hold divers to improve their performance, despite observational evidence of fainting and loss of consciousness in the first seconds of apnea.
Methods: We describe here the time course of hemodynamic changes, induced by breath-holding with and without lung packing, in 2 world-class apnea competitors.
Results: When compared with apnea performed after a deep breath (100% vital capacity), lung packing leads to a decrease in cardiac output, blood pressure, and cerebral blood flow during the first seconds after the beginning of apnea.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!