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1-11 of 11
Keywords: heart rate variability
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Journal Articles
Sabine L. Laguë, Catherine M. Ivy, Julia M. York, Beverly A. Chua, Luis Alza, Rebecca Cheek, Neal J. Dawson, Peter B. Frappell, Anthony P. Farrell, Kevin G. McCracken, Graham R. Scott, William K. Milsom
Journal:
Journal of Experimental Biology
J Exp Biol (2020) 223 (5): jeb211250.
Published: 11 March 2020
... consumption rate, blood O 2 saturation, haematocrit (Hct) and blood haemoglobin (Hb) concentration. We calculated O 2 pulse (the product of stroke volume and the arterial–venous O 2 content difference), blood O 2 concentration and heart rate variability. Regardless of altitude, all eight populations...
Includes: Supplementary data
Journal Articles
Egidi Mayara Silva Firmino, Luciana Bärg Kuntze, Davi Campos Lagatta, Daniel Penteado Martins Dias, Leonardo Barbosa Moraes Resstel
Journal:
Journal of Experimental Biology
J Exp Biol (2019) 222 (20): jeb204883.
Published: 23 October 2019
...) or chronic variable stress (CVS) on baroreflex, chemoreflex and heart rate variability in a protocol of 14 days of stress sessions. Exposure to RRS and CVS indicated no changes in the basal level of either arterial pressure or heart rate. However, RRS and CVS were able to attenuate sympathovagal modulation...
Journal Articles
Journal:
Journal of Experimental Biology
J Exp Biol (2018) 221 (17): jeb183830.
Published: 13 September 2018
... in the elasmobranch S qualus suckleyi . Hypoxia and hyperoxia had little effect on heart rate but did alter breathing frequency and amplitude. Atropine yielded an overall tachycardia in all oxygen conditions and abolished all heart rate variability (HRV), suggesting that HRV solely reflects fluctuating vagal tonus...
Journal Articles
Journal:
Journal of Experimental Biology
J Exp Biol (2016) 219 (9): 1283–1286.
Published: 1 May 2016
... <0.001) but unchanged with acclimation. Autonomic blockade showed initial responses were mainly of vagal origin, with little subsequent withdrawal or recovery in long-term heart rate variability after 6 weeks. Given the limited cardiorespiratory capacity to withstand sustained warming, effective...
Journal Articles
Edwin W. Taylor, Cleo A. C. Leite, Marina R. Sartori, Tobias Wang, Augusto S. Abe, Dane A. Crossley, II
Journal:
Journal of Experimental Biology
J Exp Biol (2014) 217 (5): 690–703.
Published: 1 March 2014
... efferent fibres in the vagus nerve, is also responsible for beat-to-beat changes in heart rate such as the high frequency components observed in spectral analysis of heart rate variability. These include respiratory modulation of the heartbeat that can generate cardiorespiratory synchrony in fish...
Journal Articles
Journal:
Journal of Experimental Biology
J Exp Biol (2011) 214 (18): 3021–3031.
Published: 15 September 2011
... for correspondence ( [email protected] ) 28 5 2011 © 2011. 2011 β-oxidation capillarity heart rate variability hypotension hypothermia Mammals are generally sensitive to hypothermia, with the first pathological symptoms occurring at a core temperature ( T b ) as high as 34°C...
Includes: Supplementary data
Journal Articles
Journal:
Journal of Experimental Biology
J Exp Biol (2007) 210 (23): 4224–4232.
Published: 1 December 2007
... kPa) the jeju increased the frequency of air breathing ( f AB ) tenfold and maintained M tO 2 unchanged from normoxia. This was associated with a significant increase in heart rate variability (HRV),each air breath (AB) being preceded by a brief bradycardia and then followed by a brief tachycardia...
Journal Articles
Journal:
Journal of Experimental Biology
J Exp Biol (2007) 210 (14): 2472–2480.
Published: 15 July 2007
...) mathematics to examine the rate association under varying levels of oxygen consumption( Ṁ O 2 ). At low Ṁ O 2 (0.94 mmol O 2 kg –1 h –1 ) there was a correspondingly low f H and f V (25.5±2.4 min –1 and 29.2±2.6 min –1 , respectively). Heart rate variability (HRV) consisted of oscillatory components caused...
Journal Articles
Journal:
Journal of Experimental Biology
J Exp Biol (2006) 209 (6): 1093–1100.
Published: 15 March 2006
... analyzed short-term heart rate variability (HRV). The frequency band width of heart rate variability revealed that HRV increased between 4 d.p.f. and 15 d.p.f. From 13 to 15 d.p.f. atropine reduced the frequency band width of HRV, whereas the combination of atropine and propranolol effectively reduced...
Journal Articles
Journal:
Journal of Experimental Biology
J Exp Biol (2004) 207 (11): 1969–1976.
Published: 1 May 2004
...H. A. Campbell; E. W. Taylor; S. Egginton SUMMARY Anaesthesia and minor surgery to place electrocardiogram recording electrodes in the short-horned sculpin caused a decrease in mean normal beat(R–R) interval and heart rate variability (HRV), measured as the standard deviation in the R–R interval...
Journal Articles
Journal:
Journal of Experimental Biology
J Exp Biol (1991) 156 (1): 611–617.
Published: 1 March 1991
...Luis De Vera; Imants G. Priede ABSTRACT Records of heart rate often show short-term variation in beat-to-beat interval which can be plotted as a heart rate variability signal (HRVS). It has been suggested that, in mammals, analysis of the HRVS can be used as a quantitative means of investigating...