scholarly journals Perinatal Cardiovascular Evaluation in Dorper Sheep Echocardiographic Description and Behavior of the Heart Rate Variability on the Field

2021 ◽  
Vol 16 (4) ◽  
pp. 233-246
Author(s):  
Amanda Sarita Cruz Aleixo ◽  
Mayra de Castro Ferreira Lima ◽  
Ana Luísa Holanda de Albuquerque ◽  
Raphael Tortorelli Teixeira ◽  
Danilo Otávio Laurenti Ferreira ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Dorper Sheep ◽  
Cardiovascular Evaluation ◽  
And Behavior

scholarly journals Gravity Threshold and Dose Response Relationships: Health Benefits Using a Short Arm Human Centrifuge

2021 ◽  
Vol 12 ◽  
Author(s):  
Chrysoula Kourtidou-Papadeli ◽  
Christos A. Frantzidis ◽  
Sotiria Gilou ◽  
Christina E. Plomariti ◽  
Christiane M. Nday ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Cardiac Output ◽  
Dose Response ◽  
Neuromuscular Disorders ◽  
Male And Female ◽  
Cardiovascular Parameters ◽  
Cardiac Power ◽  
Cardiovascular Evaluation

PurposeIncreasing the level of gravity passively on a centrifuge, should be equal to or even more beneficial not only to astronauts living in a microgravity environment but also to patients confined to bed. Gravity therapy (GT) may have beneficial effects on numerous conditions, such as immobility due to neuromuscular disorders, balance disorders, stroke, sports injuries. However, the appropriate configuration for administering the Gz load remains to be determined.MethodsTo address these issues, we studied graded G-loads from 0.5 to 2.0g in 24 young healthy, male and female participants, trained on a short arm human centrifuge (SAHC) combined with mild activity exercise within 40–59% MHR, provided by an onboard bicycle ergometer. Hemodynamic parameters, as cardiac output (CO), stroke volume (SV), mean arterial pressure (MAP), systolic blood pressure (SBP), diastolic blood pressure (DBP), and heart rate (HR) were analyzed, as well as blood gas analysis. A one-way repeated measures ANOVA and pairwise comparisons were conducted with a level of significance p < 0.05.ResultsSignificant changes in heart rate variability (HRV) and its spectral components (Class, Fmax, and VHF) were found in all g loads when compared to standing (p < 0.001), except in 1.7 and 2.0g. There were significant changes in CO, cardiac index (CI), and cardiac power (CP) (p < 0.001), and in MAP (p = 0.003) at different artificial gravity (AG) levels. Dose-response curves were determined based on statistically significant changes in cardiovascular parameters, as well as in identifying the optimal G level for training, as well as the optimal G level for training. There were statistically significant gender differences in Cardiac Output/CO (p = 0.002) and Cardiac Power/CP (p = 0.016) during the AG training as compared to standing. More specifically, these cardiovascular parameters were significantly higher for male than female participants. Also, there was a statistically significant (p = 0.022) gender by experimental condition interaction, since the high-frequency parameter of the heart rate variability was attenuated during AG training as compared to standing but only for the female participants (p = 0.004).ConclusionThe comprehensive cardiovascular evaluation of the response to a range of graded AG loads, as compared to standing, in male and female subjects provides the dose-response framework that enables us to explore and validate the usefulness of the centrifuge as a medical device. It further allows its use in precisely selecting personalized gravity therapy (GT) as needed for treatment or rehabilitation of individuals confined to bed.

Anxiety and pain in horses measured by heart rate variability and behavior

2017 ◽  
Vol 22 ◽  
pp. 1-6 ◽  
Author(s):  
Katherine Reid ◽  
Chris W. Rogers ◽  
Gabriella Gronqvist ◽  
Erica K. Gee ◽  
Charlotte F. Bolwell
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
And Behavior

Heart Rate Variability Biofeedback, Self-Regulation, and Severe Brain Injury

Biofeedback ◽  
2015 ◽  
Vol 43 (1) ◽  
pp. 6-14 ◽  
Author(s):  
Sonya Kim ◽  
Joseph F. Rath ◽  
Rollin McCraty ◽  
Vance Zemon ◽  
Marie M. Cavallo ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Brain Injury ◽  
Self Regulation ◽  
Emotional Dysregulation ◽  
Behavioral Regulation ◽  
Severe Brain Injury ◽  
Heart Rate Variability Biofeedback ◽  
Sympathetic Nervous Systems ◽  
And Behavior

This article describes a study using heart rate variability (HRV) biofeedback to treat emotional dysregulation in 13 individuals with severe chronic brain injury. Measures included HRV indices, tests of attention and problem solving, and informant reports of behavioral regulation. Results demonstrated that individuals with severe brain injury were able to learn HRV biofeedback and increase coherence between the parasympathetic and sympathetic nervous systems. Individuals who attained the greatest coherence were rated as being able to best regulate their emotions and behavior.

scholarly journals Perinatal Cardiovascular Evaluation in Dorper Sheep: Echocardiographic Description and Behavior of the Heart Rate Variability on the Field

2020 ◽  
Author(s):  
Amanda Sarita Cruz Aleixo ◽  
Mayra de Castro Ferreira Lima ◽  
Ana Luisa Holanda de Albuquerque ◽  
Raphael Tortorelli Teixeira ◽  
Renata Alves de Paula ◽  
...  
Keyword(s):  
Interventricular Septum ◽  
Internal Diameter ◽  
The Third ◽  
Ultrasound Device ◽  
Physiological Alterations ◽  
Pregnant Sheep ◽  
Echocardiographic Parameters ◽  
Dorper Sheep ◽  
Cardiovascular Evaluation ◽  
And Behavior

This study aimed at evaluating changes in the clinical and echocardiographic parameters of pregnant sheep, as well as the HRV indexes due to the physiological alterations that happen at this stage implicating in high maternal metabolic demands. For this purpose, the study evaluated 10 Dorper sheep through their pregnancy, starting from the second month until the day before birth, conducting clinical, echocardiographic and electrocardiographic examinations focused on the HRV. The echocardiogram was conducted in a doppler ultrasound device with a multifrequency sectorial transducer in bidimensional mode. The HRV indexes were obtained through the Televet 100® system. There were increases in the thickness of the interventricular septum during diastole starting from the third month, and in the internal diameter of the left ventricle during systole and diastole at the second and third months, while the ejection fraction increased as the pregnancy progressed. The size of the left atrium increased starting at the second month. The SDNN, RMSSD and PNN50 HRV indexes were higher at the fifth month of pregnancy and after delivery. There were no significant differences in the frequency-domain HRV indexes during pregnancy. The gestation leads to alterations in the clinical parameters and the activity of the autonomic nervous system.

scholarly journals Heart rate variability in Dorper sheep in the fetal and neonatal periods until 120 days of age: use of the technique in the field

2020 ◽  
Author(s):  
Amanda Sarita CRUZ-ALEIXO ◽  
Mayra DE CASTRO FERREIRA LIMA ◽  
Ana Luísa HOLANDA DE ALBUQUERQUE ◽  
Raphael TORTORELLI TEIXEIRA ◽  
Renata Alves DE PAULA ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Dorper Sheep

Heart rate variability explored in the frequency domain: A tool to investigate the link between heart and behavior

2009 ◽  
Vol 33 (2) ◽  
pp. 71-80 ◽  
Author(s):  
Nicola Montano ◽  
Alberto Porta ◽  
Chiara Cogliati ◽  
Giorgio Costantino ◽  
Eleonora Tobaldini ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Frequency Domain ◽  
And Behavior

scholarly journals Evaluation of heart rate variability and behavior of electrocardiographic parameters in dogs affected by chronic Monocytic Ehrlichiosis

PLoS ONE ◽  
2019 ◽  
Vol 14 (5) ◽  
pp. e0216552
Author(s):  
Mauricio Gianfranchesco Filippi ◽  
Mayra de Castro Ferreira Lima ◽  
Antonio Carlos Paes ◽  
Amanda Sarita Cruz Aleixo ◽  
Eunice Oba ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Electrocardiographic Parameters ◽  
And Behavior
Sign in / Sign up

Export Citation Format

Share Document