EurekaMag.com logo
+ Site Statistics
References:
53,869,633
Abstracts:
29,686,251
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on LinkedInFollow on LinkedIn

+ Translate

Analysis of changes in tonus occurring at the center of vagus innervation of the heart in hypoxic and anemic hypoxia in adult dogs



Analysis of changes in tonus occurring at the center of vagus innervation of the heart in hypoxic and anemic hypoxia in adult dogs



Byul Eksp Biol Med 59(4): 22-25



A study was made on adult dogs of the effect of hypoxemic hypoxemia (inhalation of gas mixture with a decreased oxygen content) and anemic hypoxemia (blood letting) on changes in the vagus tonus and the rhythm of heart contractions. To mild hypoxemic hypoxemia the dog at 1st responds with a bradycardiac reaction combined with an increase in the vagus tonus, which is manifested by the growing level of nerve impulses from the central portion of the vagus nerve. With an increase in the degree of hypoxemic hypoxemia the dog exhibits the tachycardiac reaction. In this case, the level of vagus impulses, though somewhat reduced, is not eliminated entirely. In anemic hypoxemia the bradycardiac phase is absent. Although the reaction to blood loss is immediately manifested by tachycardia, the level of vagus impulses in this case, far from being reduced, may even increase somewhat. The tachycardia arising in hypoxemic and anemic hypoxemia cannot be accounted for by the elimination of the vagus tonus. A possible role played by catecholamines in tachycardia developing in these conditions is discussed.

(PDF emailed within 1 workday: $29.90)

Accession: 030053909

Download citation: RISBibTeXText



Related references

On the analysis of changes in the tonus of the vagus innervation center of the heart in hypoxic and anemic hypoxia in adult dogs. Biulleten' Eksperimental'noi Biologii i Meditsiny 59(4): 22-25, 1965

Analysis of changes in the tonus of the vagus innervation center of the heart in adult dogs under morphine-ether anesthesia. Byul Eksp Biol Med 59(3): 36-40, 1965

Analysis Of Changes In The Tonus Of Vagus Innervation Centers Of The Heart In Morphine-Ether Anesthesia In Adult Dogs. Biulleten' Eksperimental'noi Biologii i Meditsiny 59: 36-40, 1965

On The Analysis Of The Tonus Of The Vagal Innervation Center Of The Heart In Lower Monkeys (Macaca). Biulleten' Eksperimental'noi Biologii i Meditsiny 13: 12-16, 1964

Mechanism of origination of tonic excitation in the center of vagus innervation of the heart in adult rabbits and rats. Biulleten' Eksperimental'noi Biologii i Meditsiny 61(4): 7-10, 1966

Oxygen delivery and uptake in dogs during anemic and hypoxic hypoxia. Journal of Applied Physiology: Respiratory, Environmental and Exercise Physiology 42(2): 228-234, 1977

Influence of partial pancreatectomy on the tonus of the center of the vagus nerve in dogs in chronic experiments. Byul Eksp Biol Med 64(7): 41-43, 1967

Appearance of excess lactate in anesthetized dogs during anemic and hypoxic hypoxia. American Journal of Physiology 209(3): 604-610, 1965

Dynamics Of The Ecg T Wave In Increase Of Tonus Of The Vagus Nerve Center In Dogs Under Normal Conditions And In Experimental Myocardial Infarct. Biulleten' Eksperimental'noi Biologii i Meditsiny 56: 52-56, 1963

The activity of some oxy reductases in a heart with disturbed vagus innervation during hypoxia. Patologicheskaya Fiziologiya i Eksperimental'naya Terapiya (6): 54-57, 1975

Activity of certain oxidoreductases in the heart with disturbed vagus innervation in hypoxia. Patologicheskaia Fiziologiia i Eksperimental'naia Terapiia: 54-57, 1975

Mechanism governing the origin of tonic excitation in the center of vagus innervation In the heart of rabbits and rats. Byul Eksp Biol Med 61(4): 7-10, 1966

Different effects of the right vagus and left vagus on experimental atrial fibrillation in dogs. IV. Action of acetylcholine in slow perfusion and of hypoxia on reproduction of the fibrillatory rhythm disappearing with section of the right vagus. Bollettino Della Societa Italiana di Biologia Sperimentale 41(23): 1428-1430, 1965

Maximal oxygen consumption during anemic hypoxia vs hypoxic hypoxia in canine gastrocnemius in situ. Medicine & Science in Sports & Exercise 22(2 SUPPL): S70, 1990

Analysis of the characteristic features of the tone of the vagus cardiac innervation center in lower monkeys. Byul Eksp Biol Med 57(4): 12-16, 1964