breath-hold

breath-hold

voluntary suppression of breathing movements. The breath-hold time is very variable between subjects and conditions. Starting from full lung volume, breathing air, less than one minute is usual, but longer after hyperventilation or after breathing oxygen. Although the unsuppressible stimulus to breathe at break-point is related to rising carbon dioxide and falling oxygen in the blood, interaction with other factors is complex, involving central respiratory rhythm, afferents from the diaphragm and decreasing lung volume. See also diving.
References in periodicals archive ?
54 minutes for the longest breath-hold under water was ratified by the Guinness World Records on Friday.
A daredevilCediver is dropping into Dubai hoping to earn Dhs10,000 for every minute without a gulp of air as he attempts to break the Guinness World Record for the longest breath-hold underwater.
Fazza Freediving Champion, Branko Petrovic, will attempt to break the Guinness World Record for the longest breath-hold underwater also known as static apnea next month.
My personal breath-hold best was around 50 seconds; she promised that within two hours of training, I'd double it.
We have also implemented breath-hold treatments for left-sided breast cancer, which can reduce the radiation dose to the heart.
The new research was conducted by Swedish scientists on 12 healthy volunteers who were trained in breath-hold diving.
Helical CT uses x-rays to obtain a multiple-image scan of the entire chest during a 7- to 15-second breath-hold, whereas a standard chest x-ray produces only a single image of the chest from a sub-second breath-hold.
A deep water blackout is a loss of consciousness caused by cerebral hypoxia, or inadequate oxygenation, on ascending from a deep free dive or breath-hold dive.
Properly prepared and coached to cooperate with breath-hold techniques, the best quality of body MRI studies can be anticipated in children between 12 to 18 years of age.
Safe breath-hold diving requires an appreciation of the risks involved and strategies for protecting yourself.
These data establish beaked whales as the extreme breath-hold champions of all animals studied so far," said WHOI engineer Mark Johnson, who developed the "D-tags," which record whale movements, their echolocations, and other underwater sounds.