Heart rate response to breath-holding during supramaximal exercise

1989 ◽  
Vol 59 (1-2) ◽  
pp. 146-151 ◽  
Author(s):  
B. Ahn ◽  
Y. Nishibayashi ◽  
S. Okita ◽  
A. Masuda ◽  
S. Takaishi ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Response ◽  
Breath Holding ◽  
Supramaximal Exercise

Role of the carotid bodies in the heart rate response to breath holding in man

1976 ◽  
Vol 41 (3) ◽  
pp. 336-340 ◽  
Author(s):  
P. M. Gross ◽  
B. J. Whipp ◽  
J. T. Davidson ◽  
S. N. Koyal ◽  
K. Wasserman
Keyword(s):  
Heart Rate ◽  
Heart Rate Response ◽  
Normal Subjects ◽  
The Other ◽  
Breath Holding ◽  
Asthmatic Patients ◽  
Carotid Bodies ◽  
Normal Man

To investigate the role of the carotid bodies in regulating the bradycardia of breath holding in man, we studied heart rate (HR) responses to prolonged breath holding (BH) in five asymptomatic asthmatic patients whose carotid bodies had been resected (CBR). Seven normal subjects served as controls. BH experiments were randomly initiated with single breaths of 100%, 21%,or 12% 92. During BH with 21% O2, normal subjects displayed the typical bradycardia; this response, however, was attenuated with the other O2 concentrations. In contrast, the CBR subjects manifested BH tachycardia which was inversely proportional to the O2 tension. HR increased in be CBR group by 5%, 31%, and 45% during BH with 100%, 21%, and 12% O2, respectively. These results demonstrate that the bradycardia of BH in normal man is under the influence of the carotid bodies. During BH and in the absence of carotid bodies, an O2 tension-dependent tachycardia is unveiled.

Heart rate during breath-holding and diving in the unrestrained harbor seal (Phoca vitulina richardi)

1973 ◽  
Vol 51 (7) ◽  
pp. 671-680 ◽  
Author(s):  
David R. Jones ◽  
H. Dean Fisher ◽  
Susan McTaggart ◽  
Nigel H. West
Keyword(s):  
Heart Rate ◽  
Associative Learning ◽  
Heart Rate Response ◽  
Harbor Seal ◽  
Phoca Vitulina ◽  
Breath Holding ◽  
Harbor Seals ◽  
Breathing Rate ◽  
Complex Phenomenon

Heart rate and breathing movements have been monitored in three unrestrained harbor seals. On voluntary submergence heart rate fell markedly in all seals, and after 2–3 s submergence stabilized at about 40–50% of the predive level. Heart rate increased before the animals broke surface at the end of the dive and, when breathing began again, a postdive tachycardia was observed. Two of the three seals frequently showed anticipation of the dive as judged from their heart-rate response. Heart rate during feeding dives was generally more variable; in fact one seal exhibited no bradycardia in 20% of its feeding dives, although another seal showed a significantly greater bradycardia than was seen in routine dives. When breathing rate was low (less than five breaths min−1) respiratory variations in the heart rate occurred, although the onset of bradycardia was much more rapid during diving than during breath-holding. Because of the flexibility of the response it is concluded that the generation of diving bradycardia in the seal is a complex phenomenon which, aside from any responses set in train by peripheral receptors, must also involve some form of associative learning.

Heart rate response to breath holding at 18.6 ATA

1977 ◽  
Vol 30 (1-2) ◽  
pp. 69-79
Author(s):  
Richard M. Smith ◽  
Suk Ki Hong
Keyword(s):  
Heart Rate ◽  
Heart Rate Response ◽  
Breath Holding

The discriminative control of a conditioned heart rate response.

1957 ◽  
Author(s):  
Philip J. Bersh ◽  
Joseph M. Notterman ◽  
William N. Schoenfeld
Keyword(s):  
Heart Rate ◽  
Heart Rate Response ◽  
Discriminative Control ◽  
Conditioned Heart Rate

Effect of human galanin on the response of circulating catecholamines to hypoglycemia in man

1995 ◽  
Vol 133 (6) ◽  
pp. 723-728 ◽  
Author(s):  
Ettore C degli Uberti ◽  
Maria R Ambrosio ◽  
Marta Bondanelli ◽  
Giorgio Transforini ◽  
Alberto Valentini ◽  
...  
Keyword(s):  
Heart Rate ◽  
Healthy Subjects ◽  
Sympathetic Nerve Activity ◽  
Heart Rate Response ◽  
Statistical Significance ◽  
Inhibitory Effect ◽  
Amino Acid Residues ◽  
Nerve Activity ◽  
Receptor Stimulation

degli Uberti EC, Ambrosio MR, Bondanelli M, Trasforini G, Valentini A, Rossi R, Margutti A, Campo M. Effect of human galanin on the response of circulating catecholamines to hypoglycemia in man. Eur J Endocrinol 1995;133:723–8. ISSN 0804–4643 Human galanin (hGAL) is a neuropeptide with 30 amino acid residues that has been found in the peripheral and central nervous system, where it often co-exists with catecholamines. In order to clarify the possible role of hGAL in the regulation of sympathoadrenomedullary function, the effect of a 60 min infusion of hGAL (80 pmol·kg−1 · min−1) on plasma epinephrine and norepinephrine responses to insulin-induced hypoglycemia in nine healthy subjects was investigated. Human GAL administration significantly reduced both the release of basal norepinephrine and the response to insulin-induced hypoglycemia, whereas it attenuated the epinephrine response by 26%, with the hGAL-induced decrease in epinephrine release failing to achieve statistical significance. Human GAL significantly increased the heart rate in resting conditions and clearly exaggerated the heart rate response to insulin-induced hypoglycemia, whereas it had no effect on the blood pressure. We conclude that GAL receptor stimulation exerts an inhibitory effect on basal and insulin-induced hypoglycemia-stimulated release of norepinephrine. These findings provide further evidence that GAL may modulate sympathetic nerve activity in man but that it does not play an important role in the regulation of adrenal medullary function. Ettore C degli Uberti, Chair of Endocrinology, University of Ferrara, Via Savonarola 9, I-44100 Ferrara, Italy

scholarly journals Genetic and Environmental Sources of Variation in Heart Rate Response to Infused Nicotine in Twins

2007 ◽  
Vol 16 (6) ◽  
pp. 1057-1064 ◽  
Author(s):  
Gary E. Swan ◽  
Christina N. Lessov-Schlaggar ◽  
Ruth E. Krasnow ◽  
Kirk C. Wilhelmsen ◽  
Peyton Jacob ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Response ◽  
Sources Of Variation
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