Note on Relation of Autonomic Perception to Voluntary Control of Heart Rate

1975 ◽  
Vol 40 (2) ◽  
pp. 533-534 ◽  
Author(s):  
Kirk R. Blankstein
Keyword(s):  
Heart Rate ◽  
Voluntary Control ◽  
Lower Heart Rate ◽  
Cardiac Control ◽  
Autonomic Perception

Relationships between subscores of the Autonomic Perception Questionnaire and ability to raise and lower heart rate voluntarily were examined in 40 subjects. Subscores which reflected general autonomic awareness in anxiety and pleasure states were not predictive of degree of cardiac control, while the subscore specific to reported awareness of heart functioning during pleasure states only was positively correlated with ability to raise heart rate.

Cardiovascular Perception and Voluntary Control of Heart Rate

1980 ◽  
Vol 50 (3_suppl) ◽  
pp. 1107-1110 ◽  
Author(s):  
A. E. Puente ◽  
L. S. Clark ◽  
I. H. Beiman
Keyword(s):  
Heart Rate ◽  
Voluntary Control ◽  
Short Version ◽  
Lower Heart Rate ◽  
Control Heart ◽  
Decrease Heart Rate ◽  
Autonomic Perception ◽  
Control Heart Rate

From 519 participants administered the cardiovascular functioning items of the Autonomic Perception Questionnaire, 42 were chosen and divided into groups low, middle, or high in perception based on the total score. Each participant was given six 2-min. trials during which they were to raise or lower heart rate. The short version of the questionnaire did not predict ability to control heart rate. However, the three groups were able to increase and decrease heart rate on command.

scholarly journals The Relationship Between Dive and Pre-Dive Heart Rates in Restrained and Free Dives by Diving Ducks

1987 ◽  
Vol 127 (1) ◽  
pp. 333-348 ◽  
Author(s):  
R. A. FURILLA ◽  
DAVID R. JONES
Keyword(s):  
Heart Rate ◽  
Marked Effect ◽  
Sympathetic Nerves ◽  
Vagal Activity ◽  
Similar Increase ◽  
Lower Heart Rate ◽  
Diving Ducks ◽  
Cardiac Responses ◽  
Cardiac Control ◽  
The Relationship

Dive heart rate was plotted against pre-dive heart rate in forced and voluntary dives and dabbles by restrained and free ducks. The relationship between pre-dive heart rate and the cardiac interval occurring just before or coincident with submersion (first cardiac interval) and the heart rate after 2–5 s submergence (stabilized heart rate) was emphasized. Stabilized heart rate in forced dives by restrained ducks at rest and at the end of a bout of exercise, and heart rate in voluntary dives and dabbles were linearly related on a plot of dive heart rate against the logarithm of predive heart rate. Even the heart rate occurring 2–5 s after ducks were ‘trapped’ under water, compared with the rate immediately before ‘trapping’, fitted on this line. The line was described by the equation y = - 451 + 2461ogx where y is dive (or trapped) and × is pre-dive (or pre-trap) heart rate (r2 = 0.98). The relationship was unaltered by β-blockade with propranolol. Furthermore, nasal blockade with Xylocaine, O2 breathing before submersion, and arterial baroreceptor denervation had no marked effect on the relationship in voluntary and trapped dives. Implantation of stimulating electrodes bilaterally on the cut distal ends of vagal and cardiac sympathetic nerves suggested that in all these dives there is a similar increase in the level of efferent vagal activity during submersion. However, the first cardiac interval in voluntary dives represents a much lower heart rate and therefore higher level of vagal activity. The present data suggest that there is considerable psychogenic modulation of cardiac responses in voluntary diving and only in forced dives, by restrained animals, is cardiac control largely reflexogenic.

Psychophysical and physiological comparison of squat and semi-squat lifting by young males

1999 ◽  
Vol 2 (1) ◽  
pp. 17-26
Author(s):  
Leon Straker ◽  
Carol Cain
Keyword(s):  
Heart Rate ◽  
Perceived Exertion ◽  
Ratings Of Perceived Exertion ◽  
Lower Heart Rate ◽  
Young Males ◽  
Squat Lifting

A comparison between semi-squat and squat techniques was made for floor to knuckle height lifting using maximum acceptable weight (MAW), ratings of perceived exertion (RPE) and heart rate. Semi-squat lifting resulted in greater MAW with lower RPE and lower heart rate compared to squat lifting. Discomfort was most commonly reported in knees/quadriceps with squat lifting. Twelve of the 13 subjects preferred the semi-squat technique. The results provide evidence that the semi-squat technique may have benefits over the squat technique for lifting a medium sized box from floor to knuckle height.

scholarly journals Nonlinearities of heart rate variability in animal models of impaired cardiac control: contribution of different time scales

2017 ◽  
Vol 123 (2) ◽  
pp. 344-351 ◽  
Author(s):  
Luiz Eduardo Virgilio Silva ◽  
Renata Maria Lataro ◽  
Jaci Airton Castania ◽  
Carlos Alberto Aguiar Silva ◽  
Helio Cesar Salgado ◽  
...  
Keyword(s):  
Nonlinear Dynamics ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Time Scales ◽  
Multiscale Entropy ◽  
Time Frequency ◽  
Cardiac Control ◽  
Long Time ◽  
Nonlinear Features ◽  
Short Time

Heart rate variability (HRV) has been extensively explored by traditional linear approaches (e.g., spectral analysis); however, several studies have pointed to the presence of nonlinear features in HRV, suggesting that linear tools might fail to account for the complexity of the HRV dynamics. Even though the prevalent notion is that HRV is nonlinear, the actual presence of nonlinear features is rarely verified. In this study, the presence of nonlinear dynamics was checked as a function of time scales in three experimental models of rats with different impairment of the cardiac control: namely, rats with heart failure (HF), spontaneously hypertensive rats (SHRs), and sinoaortic denervated (SAD) rats. Multiscale entropy (MSE) and refined MSE (RMSE) were chosen as the discriminating statistic for the surrogate test utilized to detect nonlinearity. Nonlinear dynamics is less present in HF animals at both short and long time scales compared with controls. A similar finding was found in SHR only at short time scales. SAD increased the presence of nonlinear dynamics exclusively at short time scales. Those findings suggest that a working baroreflex contributes to linearize HRV and to reduce the likelihood to observe nonlinear components of the cardiac control at short time scales. In addition, an increased sympathetic modulation seems to be a source of nonlinear dynamics at long time scales. Testing nonlinear dynamics as a function of the time scales can provide a characterization of the cardiac control complementary to more traditional markers in time, frequency, and information domains. NEW & NOTEWORTHY Although heart rate variability (HRV) dynamics is widely assumed to be nonlinear, nonlinearity tests are rarely used to check this hypothesis. By adopting multiscale entropy (MSE) and refined MSE (RMSE) as the discriminating statistic for the nonlinearity test, we show that nonlinear dynamics varies with time scale and the type of cardiac dysfunction. Moreover, as complexity metrics and nonlinearities provide complementary information, we strongly recommend using the test for nonlinearity as an additional index to characterize HRV.

Pharmacological modulation of vagal cardiac control measured by heart rate power spectrum: A possible bioequivalent probe

1991 ◽  
Vol 15 (1) ◽  
pp. 51-55 ◽  
Author(s):  
M. Alcalay ◽  
S. Izraeli ◽  
R. Wallach-Kapon ◽  
Z. Tochner ◽  
Y. Benjamini ◽  
...  
Keyword(s):  
Heart Rate ◽  
Power Spectrum ◽  
Pharmacological Modulation ◽  
Cardiac Control

scholarly journals Lower heart rate is associated with good one-year outcome in post-resuscitation patients

Resuscitation ◽  
2018 ◽  
Vol 128 ◽  
pp. 112-118 ◽  
Author(s):  
Tuomas Oksanen ◽  
Marjaana Tiainen ◽  
Jukka Vaahersalo ◽  
Stepani Bendel ◽  
Tero Varpula ◽  
...  
Keyword(s):  
Heart Rate ◽  
Lower Heart Rate ◽  
One Year

scholarly journals PSII-13 Providing on-farm handling tools to move grow-finish pig cadavers

2019 ◽  
Vol 97 (Supplement_2) ◽  
pp. 232-232
Author(s):  
Ella E Akin ◽  
Anna K Johnson ◽  
Cassandra Jass ◽  
Jason W Ross ◽  
Suzanne T Millman ◽  
...  
Keyword(s):  
Heart Rate ◽  
Oxygen Saturation ◽  
Fixed Effects ◽  
Mixed Model ◽  
Smooth Transition ◽  
Genetic Line ◽  
Lower Heart Rate ◽  
Parametric Data ◽  
On Farm ◽  
Saturation Difference

Abstract During the grow-finish phase of production some pigs become non-ambulatory and/or die requiring the need to provide caretakers with handling tools to move them safely. The goal of this study was to identify handling tools suitable for moving non-ambulatory grow-finish pig cadavers. Five caretakers on a commercial grow-finish site were asked to move three commercial crossbred (PIC) genetic line pig cadavers (59 kg, 91 kg and 98 kg), using three handling tools (sked - SKED; deer sled - SLED; modified deer sled - MDS). Outcomes included latency to move cadaver from home-pen to hospital pen, differences in caretaker heart rate (bpm) and oxygen saturation (%), and caretakers’ subjective effort score (1 = very difficult to 5 = very easy). Data were analyzed using mixed model methods for parametric data with fixed effects of caretaker, cadaver and handling tool. PDIFF was used to separate means. Caretakers differed for latency, heart rate and oxygen saturation difference (P < 0.01). The smallest cadaver was associated with shortest latency (P < 0.01) and least caretaker oxygen saturation difference (P < 0.001). The MDS was associated with shortest latency (P < 0.01), and lower heart rate differences than the SKED (P = 0.01). Oxygen saturation did not differ for handling tool. Interestingly, caretakers scored SKED and SLED as easiest for moving all cadavers. In conclusion, the MDS did not have any restraints, so when moving the cadavers they would slide off, and legs and heads became impeded in the alley gates preventing smooth transition. Therefore, the SKED and SLED would be recommended as practical handling tools to move grow-finish pig cadavers on-farm.

scholarly journals Individual variations and sex differences in hemodynamics with percutaneous arterial oxygen saturation (SpO2) in young Andean highlanders in Bolivia

2020 ◽  
Vol 39 (1) ◽  
Author(s):  
Takayuki Nishimura ◽  
Juan Ugarte ◽  
Mayumi Ohnishi ◽  
Mika Nishihara ◽  
Guillermo Alvarez ◽  
...  
Keyword(s):  
Heart Rate ◽  
Sex Differences ◽  
High Altitude ◽  
Residual Analysis ◽  
Arterial Oxygen ◽  
Lower Heart Rate ◽  
Finger Temperature ◽  
High Altitude Adaptation ◽  
Individual Variations ◽  
Altitude Adaptation

Abstract Background Many studies have reported specific adaptations to high altitude, but few studies have focused on physiological variations in high-altitude adaptation in Andean highlanders. This study aimed to investigate the relationships between SpO2 and related factors, including individual variations and sex differences, in Andean highlanders. Methods The participants were community-dwelling people in La Paz, Bolivia, aged 20 years and over (age range 20–34 years). A total of 50 men and 50 women participated in this study. Height, weight, SpO2, hemoglobin concentration, finger temperature, heart rate, and blood pressure were measured. Information about lifestyle was also obtained by interview. Results There were individual variations of SpO2 both in men (mean 89.9%, range 84.0–95.0%) and women (mean 91.0%, range 84.0–96.0%). On Student’s t test, men had significantly lower heart rate (p = 0.046) and SpO2 (p = 0.030) than women. On the other hand, men had significantly higher SBP (p < 0.001), hemoglobin (p < 0.001), and finger temperature (p = 0.004). In men, multiple stepwise regression analysis showed that a higher SpO2 was correlated with a lower heart rate (β = − 0.089, p = 0.007) and a higher finger temperature (β = 0.308, p = 0.030) (r2 for model = 0.18). In women, a higher SpO2 was significantly correlated with a higher finger temperature (β = 0.391, p = 0.015) (r2 for model = 0.12). A higher SpO2 was related to a higher finger temperature (β = 0.286, p = 0.014) and a lower heart rate (β = − 0.052, p = 0.029) in all participants (r2 for model = 0.21). Residual analysis showed that individual SpO2 values were randomly plotted. Conclusion Random plots of SpO2 on residual analysis indicated that these variations were random error, such as biological variation. A higher SpO2 was related to a lower heart rate and finger temperature in men, but a higher SpO2 was related to finger temperature in women. These results suggest that there are individual variations and sex differences in the hemodynamic responses of high-altitude adaptation in Andean highlanders.

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