scholarly journals Technical note: Assessment of the oxygen pulse and heart rate method using respiration chambers and comparative slaughter for measuring heat production of cattle

2016 ◽  
Vol 99 (11) ◽  
pp. 8885-8890 ◽  
Author(s):  
D.B. Oss ◽  
M.I. Marcondes ◽  
F.S. Machado ◽  
T.R. Tomich ◽  
M.L. Chizzotti ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heat Production ◽  
Technical Note ◽  
Oxygen Pulse ◽  
Rate Method ◽  
Comparative Slaughter

scholarly journals Impact of exercise based cardiac rehabilitation program in patients with transcatheter aortic valve replacement

2021 ◽  
Vol 28 (Supplement_1) ◽  
Author(s):  
LE Estrada Martinez ◽  
JA Lara Vargas ◽  
JA Pineda Juarez ◽  
JD Morales Portano ◽  
JB Gomez Alvarez ◽  
...  
Keyword(s):  
Heart Rate ◽  
Cardiac Rehabilitation ◽  
Intervention Group ◽  
Rehabilitation Program ◽  
Control Group ◽  
Cardiac Rehabilitation Program ◽  
Double Product ◽  
Oxygen Pulse ◽  
Transcatheter Aortic Valve ◽  
Cardiopulmonary Performance

Abstract Funding Acknowledgements Type of funding sources: None. Introduction  Due to the increase in global prevalence of degenerative valve disease, aortic stenosis (AS) has played a preponderant role in the cardiovascular scenario, especially in patients undergoing transcatheter aortic valve replacement (TAVR). An alternative management for this patients are the cardiac rehabilitation programs (CRP); however, their effect has not been completely understood, both in exercise capacity and quality of life, but neither in the improvement of cardiopulmonary performance and other cardiovascular outcomes.  Purpose: To evaluate the effect of the CRP on exercise tolerance and cardiopulmonary performance in patients with AS undergoing TAVR.  Methods: A cohort study was conducted including 26 patients with AS undergoing TAVR and divided into an intervention group who performed a 4-week supervised training program in the Cardiac Rehabilitation Service and a control group to whom instructions and recommendations to performed unsupervised exercise at home were given. Demographic and clinical data (VO2Max, METS12, oxygen pulse, heart rate, double product, left ventricular ejection fraction, body mass index) were collected at baseline and after a 4-week follow-up. Results: 15 patients were included in the intervention group and 11 patients in the control group. There were no baseline significant differences between groups. After the intervention, significant differences were observed in the METS 12 final gain variable between the control and intervention group (4.55 vs 3.1 p = 0.01). Intergroup analysis showed significant differences (percentage changes) in the intervention group with an increase of METS12 (67.4%, p = 0.001), oxygen pulse (18.21%, p = 0.01), final METS (39.47% p = 0.001) and a decrease in VO2 recovery time (-12.5%, p = 0.05), in the ergometric performance index by heart rate (-38.17%, p = 0.001) and by double product (-38.1%, p = 0.001). Conclusions  A 4-week cardiac rehabilitation program is effective to improve exercise tolerance and cardiopulmonary response in patients with AS undergoing TAVR; improvement was statistically significant in METS12, oxygen pulse, VO2 recovery time, METS-load and ergometric performance index for heart rate and double product. METS12 final gain was statistically significant in intervention group in comparison with the control group. Abstract Figure. Control vs Intervention Group (METS12)

Acclimatization of calves to a hot dry environment

1959 ◽  
Vol 52 (3) ◽  
pp. 296-304 ◽  
Author(s):  
W. Bianca
Keyword(s):  
Heart Rate ◽  
Respiratory Rate ◽  
Rectal Temperature ◽  
Heat Production ◽  
Metabolic Heat Production ◽  
Metabolic Heat ◽  
Physiological Reactions

1. Three calves were individually exposed in a climatic room to an environment of 45° C. dry-bulb and 28° C. wet-bulb temperature for 21 successive days up to 5 hr. each day.2. In the 21-day period, mostly during the first half of it, the following changes in the physiological reactions of the animals were observed: progressive reductions in rectal temperature, in heart rate and in respiratory rate with a change of breathing from a laboured to a less laboured type.3. It was suggested that a decrease in metabolic heat production might play a part in the observed acclimatization.

Energy cost of cows' grazing activity: Use of the heart rate method and the Global Positioning System for direct field estimation1

2006 ◽  
Vol 84 (7) ◽  
pp. 1951-1967 ◽  
Author(s):  
A. Brosh ◽  
Z. Henkin ◽  
E. D. Ungar ◽  
A. Dolev ◽  
A. Orlov ◽  
...  
Keyword(s):  
Heart Rate ◽  
Global Positioning System ◽  
Energy Cost ◽  
Positioning System ◽  
Global Positioning ◽  
Rate Method

Oxygen pulse in guinea pigs in hyperbaric helium and hydrogen

1997 ◽  
Vol 82 (3) ◽  
pp. 988-997 ◽  
Author(s):  
Susan R. Kayar ◽  
Erich C. Parker
Keyword(s):  
Heart Rate ◽  
Core Temperature ◽  
Guinea Pigs ◽  
Multivariate Regression Analysis ◽  
Heart Beat ◽  
Hyperbaric Chamber ◽  
Oxygen Pulse ◽  
Chamber Temperature ◽  
Hyperbaric Environment ◽  
Temperature And Pressure

Kayar, Susan R., and Erich C. Parker. Oxygen pulse in guinea pigs in hyperbaric helium and hydrogen. J. Appl. Physiol. 82(3): 988–997, 1997.—We analyzed O2 pulse, the total volume of O2 consumed per heart beat, in guinea pigs at pressures from 10 to 60 atmospheres. Animals were placed in a hyperbaric chamber and breathed 2% O2 in either helium (heliox) or hydrogen (hydrox). Oxygen consumption rate (V˙o 2) was measured by gas chromatographic analysis. Core temperature and heart rate were measured by using surgically implanted radiotelemeters. TheV˙o 2 was modulated over a fourfold range by varying chamber temperature from 25 to 36°C. There was a direct correlation betweenV˙o 2 and heart rate, which was significantly different for animals in heliox vs. hydrox ( P = 0.003). By using multivariate regression analysis, we identified variables that were significant to O2 pulse: body surface area, chamber temperature, core temperature, and pressure. After normalizing for all nonpressure variables, the residual O2 pulse was found to decrease significantly ( P = 0.02) with pressure for animals in heliox but did not decrease significantly ( P = 0.38) with pressure for animals in hydrox over the range of pressures studied. This amounted to a roughly 25% lower O2 pulse for normothermic animals in 60 atmospheres heliox vs. hydrox. These results suggest that reduction of cardiovascular efficiency in a hyperbaric environment can be mitigated by the choice of breathing gas.

scholarly journals Effects of Feed Intake and Behavior on the Relationship between Heart Rate and Heat Production, and the Evaluation of Energy Balance in Holstein Heifers

1993 ◽  
Vol 64 (4) ◽  
pp. 403-410 ◽  
Author(s):  
Takaaki MATSUMOTO ◽  
B. P. PURWANTO ◽  
Fumio NAKAMASU ◽  
Toshio ITO ◽  
Sadaki YAMAMOTO
Keyword(s):  
Heart Rate ◽  
Energy Balance ◽  
Heat Production ◽  
Feed Intake ◽  
And Behavior ◽  
The Relationship

scholarly journals The heart rate method for estimating oxygen uptake: Analyses of reproducibility using a range of heart rates from cycle commuting

PLoS ONE ◽  
2019 ◽  
Vol 14 (7) ◽  
pp. e0219741 ◽  
Author(s):  
Peter Schantz ◽  
Jane Salier Eriksson ◽  
Hans Rosdahl
Keyword(s):  
Heart Rate ◽  
Oxygen Uptake ◽  
Heart Rates ◽  
Rate Method

scholarly journals The slope of the oxygen pulse curve does not depend on the maximal heart rate in elite soccer players

Clinics ◽  
2011 ◽  
Vol 66 (5) ◽  
pp. 829-835 ◽  
Author(s):  
Raphael Rodrigues Perim ◽  
Gabriel Ruiz Signorelli ◽  
Jonathan Myers ◽  
Ross Arena ◽  
Claudio Gil Soares de Araújo
Keyword(s):  
Heart Rate ◽  
Soccer Players ◽  
Maximal Heart Rate ◽  
Oxygen Pulse

Circadian rhythm of heat production, heart rate, and skin and core temperature under unmasking conditions in men

1994 ◽  
Vol 267 (3) ◽  
pp. R819-R829 ◽  
Author(s):  
K. Krauchi ◽  
A. Wirz-Justice
Keyword(s):  
Heart Rate ◽  
Circadian Rhythm ◽  
Heat Loss ◽  
Rectal Temperature ◽  
Heat Production ◽  
Circadian Variation ◽  
Bed Rest ◽  
Sodium Potassium ◽  
Hands And Feet ◽  
Skin Temperatures

Seven healthy men were studied in a 34-h constant routine protocol to investigate whether the daily rhythm of heat production and heat loss has an endogenous circadian component. Under these unmasking conditions (constant bed rest, no sleep allowed, regular food and fluid intake), a significant circadian rhythm could be demonstrated for heat production, heart rate, and skin temperatures but not for the respiratory quotient. Heat production and heart rate were phase locked with a maximum at 1100-1200 h. Proximal skin temperatures (infraclavicular region, thigh, and forehead) followed the same circadian rhythm as rectal temperature, whereas distal skin temperatures (hands and feet) were opposite in phase. These physiological circadian rhythm parameters, as well as biochemical parameters (urinary sodium, potassium, urea, and urine flow), were phase advanced by 25-180 min with respect to the circadian rhythm in rectal temperature. Our findings under unmasking conditions show that the circadian variation in rectal temperature is a consequence of endogenous circadian rhythms in both heat production and heat loss.

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