Heart rate variability and baroreflex sensitivity are reduced in chronically undernourished, but otherwise healthy, human subjects

2003 ◽  
Vol 104 (3) ◽  
pp. 295 ◽  
Author(s):  
Mario VAZ ◽  
A. V. BHARATHI ◽  
S. SUCHARITA ◽  
D. NAZARETH
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Baroreflex Sensitivity ◽  
Human Subjects ◽  
Healthy Human ◽  
Healthy Human Subjects

Heart rate variability and baroreflex sensitivity are reduced in chronically undernourished, but otherwise healthy, human subjects

2003 ◽  
Vol 104 (3) ◽  
pp. 295-302 ◽  
Author(s):  
Mario VAZ ◽  
A.V. BHARATHI ◽  
S. SUCHARITA ◽  
D. NAZARETH
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
High Frequency ◽  
Baroreflex Sensitivity ◽  
Human Subjects ◽  
Normal Weight ◽  
Autonomic Nerve ◽  
Total Power ◽  
Healthy Human ◽  
Frequency Power

Alterations in autonomic nerve activity in subjects in a chronically undernourished state have been proposed, but have been inadequately documented. The present study evaluated heart rate and systolic blood pressure variability in the frequency domain in two underweight groups, one of which was undernourished and recruited from the lower socio-economic strata [underweight, undernourished (UW/UN); n = 15], while the other was from a high class of socio-economic background [underweight, well nourished (UW/WN); n = 17], as well as in normal-weight controls [normal weight, well nourished (NW/WN); n = 27]. Baroreflex sensitivity, which is a determinant of heart rate variability, was also assessed. The data indicate that total power (0–0.4Hz), low-frequency power (0.04–0.15Hz) and high-frequency power (0.15–0.4Hz) of RR interval variability were significantly lower in the UW/UN subjects (P<0.05) than in the NW/WN controls when expressed in absolute units, but not when the low- and high-frequency components were normalized for total power. Baroreflex sensitivity was similarly lower in the UW/UN group (P<0.05). Heart rate variability parameters in the UW/WN group were generally between those of the UW/UN and NW/WN groups, but were not statistically different from either. The mechanisms that contribute to the observed differences between undernourished and normal-weight groups, and the implications of these differences, remain to be elucidated.

Effects of water ingestion on gastric electrical activity and heart-rate variability in healthy human subjects

1996 ◽  
Vol 58 (1-2) ◽  
pp. 44-50 ◽  
Author(s):  
Michio Watanabe ◽  
Yutaka Shimada ◽  
Shinya Sakai ◽  
Naotoshi Shibahara ◽  
Harumi Matsuda ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Electrical Activity ◽  
Human Subjects ◽  
Gastric Electrical Activity ◽  
Healthy Human ◽  
Water Ingestion ◽  
Healthy Human Subjects

scholarly journals Facial Vibrotactile Stimulation Activates the Parasympathetic Nervous System: Study of Salivary Secretion, Heart Rate, Pupillary Reflex, and Functional Near-Infrared Spectroscopy Activity

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Hisao Hiraba ◽  
Motoharu Inoue ◽  
Kanako Gora ◽  
Takako Sato ◽  
Satoshi Nishimura ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Infrared Spectroscopy ◽  
Near Infrared ◽  
Human Subjects ◽  
Vibrotactile Stimulation ◽  
Functional Near Infrared Spectroscopy ◽  
Healthy Human ◽  
Healthy Human Subjects ◽  
Stimulation Of

We previously found that the greatest salivation response in healthy human subjects is produced by facial vibrotactile stimulation of 89 Hz frequency with 1.9 μm amplitude (89 Hz-S), as reported by Hiraba et al. (2012, 20011, and 2008). We assessed relationships between the blood flow to brain via functional near-infrared spectroscopy (fNIRS) in the frontal cortex and autonomic parameters. We used the heart rate (HRV: heart rate variability analysis in RR intervals), pupil reflex, and salivation as parameters, but the interrelation between each parameter and fNIRS measures remains unknown. We were to investigate the relationship in response to established paradigms using simultaneously each parameter-fNIRS recording in healthy human subjects. Analysis of fNIRS was examined by a comparison of various values between before and after various stimuli (89 Hz-S, 114 Hz-S, listen to classic music, and “Ahh” vocalization). We confirmed that vibrotactile stimulation (89 Hz) of the parotid glands led to the greatest salivation, greatest increase in heart rate variability, and the most constricted pupils. Furthermore, there were almost no detectable differences between fNIRS during 89 Hz-S and fNIRS during listening to classical music of fans. Thus, vibrotactile stimulation of 89 Hz seems to evoke parasympathetic activity.

scholarly journals Comparative study of heart rate variability between healthy human subjects and healthy dogs, rabbits and calves

2009 ◽  
Vol 43 (1) ◽  
pp. 41-45 ◽  
Author(s):  
A Manzo ◽  
Y Ootaki ◽  
C Ootaki ◽  
K Kamohara ◽  
K Fukamachi
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Comparative Study ◽  
Human Subjects ◽  
Healthy Human ◽  
Healthy Human Subjects ◽  
Healthy Dogs

Homeopathic effect on heart rate variability

1999 ◽  
Vol 88 (03) ◽  
pp. 106-111 ◽  
Author(s):  
G Ruiz ◽  
J-L Torres ◽  
O Michel ◽  
R Navarro
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Power Spectrum ◽  
Human Subjects ◽  
Healthy Human ◽  
Energy Fraction ◽  
High Frequencies ◽  
Materia Medica ◽  
Healthy Human Subjects

AbstractWe record ECGs from healthy human subjects during 24-h long intervals, using ambulatory equipment. We calculate from the data various parameters, searching for those that change in a clear and systematic way under a homoepathic stimulus, (Strophantus hispidus 30 c). The energy fraction at high frequencies in the power spectrum of heart rate variability fulfills this condition, and we are able to interpret our results in a way consistent with the information on this medicine in the homeopathic Materia Medica.

scholarly journals Exercise cardiac output is maintained with advancing age in healthy human subjects: cardiac dilatation and increased stroke volume compensate for a diminished heart rate.

Circulation ◽  
1984 ◽  
Vol 69 (2) ◽  
pp. 203-213 ◽  
Author(s):  
R J Rodeheffer ◽  
G Gerstenblith ◽  
L C Becker ◽  
J L Fleg ◽  
M L Weisfeldt ◽  
...  
Keyword(s):  
Heart Rate ◽  
Cardiac Output ◽  
Stroke Volume ◽  
Human Subjects ◽  
Healthy Human ◽  
Healthy Human Subjects ◽  
Cardiac Dilatation

Physical Exercise and Time of Day: Influences on Spontaneous Motor Tempo

2002 ◽  
Vol 95 (3) ◽  
pp. 965-972 ◽  
Author(s):  
Fabrice Dosseville ◽  
Sebastien Moussay ◽  
Jacques Larue ◽  
Antoine Gauthier ◽  
Damien Davenne
Keyword(s):  
Heart Rate ◽  
Cardiac Rhythm ◽  
Human Subjects ◽  
Internal Clock ◽  
Time Of Day ◽  
Diurnal Variations ◽  
Healthy Human ◽  
Healthy Human Subjects ◽  
Before And After ◽  
Motor Rhythm

To identify whether spontaneous motor rhythm is influenced by external or internal events and whether this rhythm fluctuates across the day in parallel with heart rate diurnal variations, we simultaneously recorded heart rate and spontaneous motor rate before and after a pedaling task performed five times a day by 10 healthy human subjects. Each subject performed a Spontaneous Motor Tempo, i.e., a finger-tapping task, at a comfortable and spontaneous cadence. Pre- and postexercise Spontaneous Motor Tempo was measured as well as heart rate. There were diurnal variations in Spontaneous Motor Tempo. Both measures increased significantly after pedaling, suggesting that cardiac and spontaneous rhythms are influenced simultaneously after a moderate exercise. Also, finger-taps occurred most frequently around the initiation of the heart systole. These results suggest that a putative internal clock might regulate Spontaneous Motor Tempo and that cardiac rhythm might influence this tempo

scholarly journals Influence of Essential Ginger Oil on Human Psychophysiology after Inhalation and Dermal Application

2016 ◽  
Vol 11 (10) ◽  
pp. 1934578X1601101
Author(s):  
Iris Stappen ◽  
Anna-Sofie Hoelzl ◽  
Olivera Randjelovic ◽  
Juergen Wanner
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Human Subjects ◽  
Zingiber Officinale ◽  
Well Being ◽  
Subjective Well Being ◽  
Healthy Human ◽  
Zingiber Officinale Roscoe ◽  
Healthy Human Subjects ◽  
Dermal Application

The influence of essential ginger oil ( Zingiberis aetheroleum from Zingiber officinale Roscoe) on blood pressure, heart rate and subjective well-being was investigated after inhalation and dermal application on healthy human subjects in two experiments. Additionally a GC-MS analysis of the tested oil is given. The essential oil exhibited a high amount of citral (19.4%). α-Zingiberene (17.4%), camphene (7.8%), trans, trans-α-farnesene (6.8%) and β-bisabolene (5.8%) were also prominent constituents. Compared with the control condition an activating effect was observed for ginger oil in the inhalation experiment.

Chronic stress decreases circulating endocannabinoid 2-arachidonoylglycerol in healthy human subjects

2015 ◽  
Author(s):  
Buqing Yi ◽  
Igor Nichiporuk ◽  
Matthias Feuerecker ◽  
Gustav Schelling ◽  
Alexander Chouker
Keyword(s):  
Chronic Stress ◽  
Human Subjects ◽  
Healthy Human ◽  
Healthy Human Subjects
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