Letter | Published:

Diving Bradycardia in the Trained Dolphin

Nature volume 212, pages 407408 (22 October 1966) | Download Citation

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Abstract

IT has been known for nearly a century that bradycardia is a common feature of the circulatory response to the asphyxia of diving. Heart slowing has been observed in a wide variety of both aquatic and terrestrial animals during submersion1–3. Several lines of evidence indicate that this bradycardia is associated with a decreased cardiac output and widespread arterial vasoconstriction with vastly diminished blood flow in viscera and skeletal muscle2,4,5. Flow in the cerebral and coronary circulations appears to be sustained.

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References

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    , Leçons sur la Physiologie Comparée de la Respiration (Paris, Baillière, 1870).

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    , Hvalradets Skrifter (Oslo), 22 (1940).

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    , Physiol. Rev., 19, 112 (1939).

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    , Amer. J. Physiol., 122, 207 (1938).

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    , , and , Fed. Proc., 23, 111 (1964).

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    , , and , J. Cell. Comp. Physiol., 17, 145 (1941).

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    , , and , Nature, 202, 809 (1964).

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    , Hvalradets Skrifter (Oslo) (in the press).

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Author information

Affiliations

  1. Scripps Institution of Oceanography, University of California, San Diego, and Mission Bay Research Foundation, San Diego, California.

    • ROBERT ELSNER
    • , DAVID W. KENNEY
    •  & KENT BURGESS

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https://doi.org/10.1038/212407a0

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