Quantifying the Effect of Aging on the Autonomic Control of Heart Rate Using Sequential Trend Analysis Plot

2011 ◽  
pp. 245-248
Author(s):  
L. Ram Gopal Reddy ◽  
Srinivas Kuntamalla
Keyword(s):  
Heart Rate ◽  
Trend Analysis ◽  
Autonomic Control

scholarly journals Caffeine affects autonomic control of heart rate and blood pressure recovery after aerobic exercise in young adults: a crossover study

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Luana Almeida Gonzaga ◽  
Luiz Carlos Marques Vanderlei ◽  
Rayana Loch Gomes ◽  
Vitor Engrácia Valenti
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Young Adults ◽  
Aerobic Exercise ◽  
Crossover Study ◽  
Autonomic Control ◽  
Pressure Recovery

AUTONOMIC CONTROL OF HEART RATE AFTER EXERCISE IN TRAINED WRESTLERS

2013 ◽  
Vol 30 (2) ◽  
pp. 111-115 ◽  
Author(s):  
Carlos Henríquez ◽  
Eduardo Báez ◽  
Astrid Von Oetinger ◽  
Rodrigo Cañas ◽  
Rodrigo Ramírez
Keyword(s):  
Heart Rate ◽  
Autonomic Control

scholarly journals Cortisol Levels and Autonomic Control of Heart Rate in Healthy Subjects

2017 ◽  
Vol 17 (2) ◽  
pp. 5-14 ◽  
Author(s):  
Milana Drumond Ramos Santana ◽  
Eli Carlos Martiniano ◽  
Larissa Raylane Lucas Monteiro ◽  
Maria Do Socorro Santos De Oliveira ◽  
Vitor E. Valenti ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Salivary Cortisol ◽  
Healthy Subjects ◽  
Autonomic Control ◽  
Autonomic Modulation ◽  
Cardiac Autonomic Modulation ◽  
Cortisol Levels ◽  
Modulation Methods

AbstractIntroduction: There is an increase in level of stress in the general population because of the social, personal and professional demands. Currently, there are only simple tools that can safely measure this stress such as levels of cortisol and heart rate variability (HRV). Objective: To analyze the relationship between salivary cortisol and the cardiac autonomic modulation. Methods: A total of fifty-one male and female subjects between 18 and 40 years old were evaluated. Saliva collection was achieved for the salivary cortisol dosage. The collection was performed through the SalivetteR tube. After this collection, the median cortisol levels (0.24 ug/dl) were analyzed and the volunteers were divided into two groups: i) cortisol below the mediane ii) cortisol above the median. After this division, each group consisted of 25 volunteers and then was verified the following information: age, gender, weight, height, body mass index (BMI), blood pressure. Shortly thereafter was assessment of cardiac autonomic modulation por meio da HRV. The Polar RS800cx heart rate receiver was placed on the chest of the volunteers, in the vicinity of the distal third of the sternum. The volunteers were instructed to remain in rest with spontaneous breathing in dorsal position for 20 minutes. HRV analysis included geometric, time and frequency domain indices. Results: There were no statistical differences for the two groups regarding systolic and diastolic blood pressure, heart rate, RR intervals or linear and frequency indices for the volunteers. In addition, also there was no correlation the cortisol with the analyzed variables (SAP, p=0.460; DAP, p = 0.270; HR, p = 0.360; RR, p = 0.380; SDNN, p = 0.510; rMSSD, p = 0.660; pNN50, p = 0.820; RRtri, p = 0.170; TINN, p = 0.470; SD1, p = 0.650; SD2, p = 0.500; LF [ms2], p = 0.880; LF [nu], p = 0.970; HF [ms2], p = 0.870; HF [nu], p = 0.960; LF/HF, p = 0.380 Conclusion: Heart rate variability autonomic control was unchanged in healthy subjects with physiological distribution of salivary cortisol levels. There was no association between normal salivary cortisol and resting autonomic regulation of heart rate.

Beat-To-Beat Variations of Heart Rate Reflect Modulation of Cardiac Autonomic Outflow

Physiology ◽  
1990 ◽  
Vol 5 (1) ◽  
pp. 32-37 ◽  
Author(s):  
JP Saul
Keyword(s):  
Heart Rate ◽  
Control Systems ◽  
Autonomic Control

What is most intriguing about heart rate (HR) variability is that there is so much of it. HR is constantly responding both rapidly and slowly to various physiological perturbations. We now understand that the frequency and amplitude of these HR fluctuations are indicative of the autonomic control systems underlying the response.

Dual Antagonistic Autonomic Control Necessary for 1/f Scaling in Heart Rate

2006 ◽  
pp. 141-151
Author(s):  
Zbigniew R. Struzik ◽  
Junichiro Hayano ◽  
Seiichiro Sakata ◽  
Shin Kwak ◽  
Yoshiharu Yamamoto
Keyword(s):  
Heart Rate ◽  
Autonomic Control

Alterations in the cardiovascular control by the chemoreflex and the baroreflex in old rats

1996 ◽  
Vol 270 (1) ◽  
pp. R310-R313 ◽  
Author(s):  
K. G. Franchini ◽  
E. D. Moreira ◽  
F. Ida ◽  
E. M. Krieger
Keyword(s):  
Heart Rate ◽  
Aging Process ◽  
Cardiovascular Function ◽  
Cardiovascular Control ◽  
Autonomic Control ◽  
Young Rats ◽  
Reflex Bradycardia ◽  
Pressor Responses ◽  
Old Rats

The aging process is associated with alterations in the autonomic control of cardiovascular function. In the present study, we observed that reflex bradycardia and tachycardia produced by pressor and depressor agents were attenuated in old (24 mo) rats [70 and 56% of responses in young rats (4 mo), respectively]. In contrast, the bradycardia induced by chemoreflex activation with increasing doses of KCN (60, 100, 140, and 180 micrograms/kg) was greater in old [-30 +/- 19, -155 +/- 32, -198 +/- 15, and -204 +/- 24 beats/ min (bpm)] than in young rats [-13 +/- 6, -75 +/- 20 (P < 0.05), -99 +/- 26 (P < 0.05), and -103 +/- 20 (P < 0.05) bpm]. The chemoreflex-pressor responses tended to be greater in old (12 +/- 6, 47 +/- 6, 54 +/- 7, and 55 +/- 5 mmHg) than in young rats (4 +/- 2, 32 +/- 8, 42 +/- 6, and 44 +/- 4 mmHg), but the differences between both groups were not statistically significant. However, pressor responses were higher in old rats after the chemoreflex-activated bradycardia was attenuated by atropine (4 mg/kg iv) [old (17 +/- 9(1) P < 0.05; 57 +/- 4, P < 0.05; 61 +/- 4; and 64 +/- 5 mmHg) vs. young (3 +/- 2, 29 +/- 9(1) 50 +/- 5, and 58 +/- 7 mmHg)]. Administration of the alpha 1-blocker prazosin (1 mg/kg iv) blunted pressor responses but did not change the bradycardia induced by chemoreflex in both groups. In conclusion, our data indicate that the bradycardia and pressor responses to chemoreflex activation were exaggerated, whereas the heart rate responses (bradycardia and tachycardia) to baroreflex were depressed in old rats.

The relationship between heart rate and functional connectivity of brain regions involved in autonomic control

NeuroImage ◽  
2019 ◽  
Vol 196 ◽  
pp. 318-328 ◽  
Author(s):  
Feliberto de la Cruz ◽  
Andy Schumann ◽  
Stefanie Köhler ◽  
Jürgen R. Reichenbach ◽  
Gerd Wagner ◽  
...  
Keyword(s):  
Heart Rate ◽  
Functional Connectivity ◽  
Brain Regions ◽  
Autonomic Control ◽  
The Relationship

scholarly journals Assessment of the impact of 10-day intermittent hypoxia on the autonomic control measured by heart rate variability

2018 ◽  
Vol 105 (4) ◽  
pp. 386-396 ◽  
Author(s):  
ZZ Taralov ◽  
KV Terziyski ◽  
PK Dimov ◽  
BI Marinov ◽  
SS Kostianev
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Nervous System ◽  
Parasympathetic Nervous System ◽  
Autonomic Control ◽  
Total Power ◽  
Hypoxic Exposure ◽  
Intermittent Hypoxic Training ◽  
Parasympathetic Nervous System Activity ◽  
The Impact

Purpose The purpose of this study is to establish the alterations in the activity of the autonomic nervous system (ANS) via heart rate variability (HRV) in subjects exposed to 1 h of exogenous hypoxia for 10 consecutive days. Methods Twelve healthy non-smoker males at mean age of 29.8 ± 7.4 (mean ± SD) breathed hypoxic air delivered through hypoxicator (FiО2 = 12.3% ± 1.5%) for 1 h in 10 consecutive days. Pulse oximetry and electrocardiography were monitored during the visit and HRV was calculated for the entire 1-h hypoxic period. Results Comparing the last hypoxic visit to the first, subjects had higher standard deviation of normal-to-normal interbeat intervals (SDNNs) (65.7 ± 32.5 vs. 81.1 ± 32.0 ms, p = 0.013) and root mean square of successive R–R interval difference (RMSSD) (58.1 ± 30.9 vs. 76.5 ± 34.6 ms, p = 0.029) as well as higher lnTotal power (8.1 ± 1.1 vs. 8.5 ± 0.9 ms2, p = 0.015) and high frequency (lnHF) (6.8 ± 1.3 vs. 7.5 ± 1.2 ms2, p = 0.05) and lower LF/HF (2.4 ± 1.4 vs. 1.5 ± 1.0, p = 0.026). Changes in saturation (87.0 ± 7.1 vs. 90.8 ± 5.0%, p = 0.039) and heart rate (67.1 ± 8.9 vs. 62.5 ± 6.0 beats/min, p = 0.040) were also observed. Conclusions Intermittent hypoxic training consisting of 1-h hypoxic exposure for 10 consecutive days could diminish the effects of acute exogenous hypoxia on the ANS characterized by an increased autonomic control (SDNN and total power) with augmentation of the parasympathetic nervous system activity (increased RMSSD and HF and decreased LF/HF). Therefore, it could be applied as a pre-acclimatization technique aiming at an increase in the autonomic control and oxygen saturation in subjects with upcoming sojourn to high altitude.

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