scholarly journals VASOMOTOR REACTIONS ON LOCAL COOLING IN YOUNG INDIVIDUALS WITH NICOTINE ADDICTION

2021 ◽  
Vol 10 (3) ◽  
pp. 5-11
Author(s):  
L. I. Gerasimova-Meigal ◽  
I. A. Tabaev
Keyword(s):  
Heart Rate ◽  
Frequency Domain ◽  
Tobacco Smoking ◽  
Vascular Reactivity ◽  
Reference Group ◽  
Circulatory System ◽  
Cold Test ◽  
Nicotine Addiction ◽  
Local Cooling ◽  
Oncological Diseases

Tobacco smoking, as a harmful individual habit, aggravates the negative environmental effects on health in people living in the northern regions of Russia, by increasing the incidence of diseases of the cardiovascular and respiratory systems, and oncological diseases. This study was aimed at elucidating the vasomotor reactions on local cooling in young people with nicotine addiction. Materials and methods. Twenty four practically healthy people (13 m, 11 f) aged 18-27 years were enrolled to the study. Of these, 16 subjects with initial stage of nicotine addiction formed the study group, and 8 non-smoking subjects served as a reference group. The degree of nicotine addiction was assessed with the Fagerstrom test and the smoking index. The local cold test (LCT) was used to study vasomotor reactions. The autonomous regulation was estimated by analyzing the time- and frequency-domain characteristics of heart rate variability (HRV). Results. In the group with nicotine addiction, increased cold-induced vasoconstriction was revealed from the dynamics of the hand skin temperature during LCT. Also, this group mwas characterized by decreased vagotonia seen as lower values of time- (SDNN, RMSSD, pNN50 and CV) and frequency- domain (TP, HF and LF) parameters of HRV. The functional test with deep controlled breathing revealed in this group lower reactivity of neurogenic mechanisms of heart rate control. Among subjects with higher number of cigarette consumption, HRV changes which corresponded with adaptation disorders were more notable. Conclusion. Individuals with initial degree of nicotine addiction were characterized by the impaired reactivity of the central and peripheral parts of the circulatory system what means lower health capacity of the organism. Increased vascular reactivity during LCT, as well as the impaired adaptation seen with HRV analysis, could serve as early indicators of the systemic effects of tobacco smoking.

scholarly journals Decreased vagal activity and deviation in sympathetic activity precedes development of diabetes

2020 ◽  
Author(s):  
Da Young Lee ◽  
Mi Yeon Lee ◽  
Jung Hwan Cho ◽  
Hyemi Kwon ◽  
Eun-Jung Rhee ◽  
...  
Keyword(s):  
Heart Rate ◽  
Frequency Domain ◽  
Confidence Intervals ◽  
Sympathetic Activity ◽  
Reference Group ◽  
Lipid Level ◽  
Vagal Activity ◽  
Model Assessment ◽  
Diabetes Group ◽  
Hazard Ratios

<b>OBJECTIVE</b> <p>The objective of this study was to examine whether altered heart rate variability (HRV) could predict the risk of diabetes in Asians. </p> <p><b>RESEARCH DESIGN AND METHODS</b></p> <p>A cohort study was conducted in 54,075 adults without diabetes who underwent three-minute HRV measurement during health check-ups between 2011 and 2014 at Kangbuk Samsung Hospital. We analyzed the time domain [standard deviation of the normal-to-normal interval(SDNN) and root mean square difference(RMSSD)] and the frequency domain [total(TP), normalized low-frequency(LF), and normalized high-frequency(HF) power, and LF/HF ratio]. We compared the risk of diabetes until 2017 according to tertiles of heart rate and HRV variables, with tertile 1 serving as the reference group.</p> <p><b>RESULTS</b></p> <p>During 243,758.2 person-years, 1,369 subjects were diagnosed with diabetes. Both time and frequency domain variables were lower in the diabetes group, with the exception of those with normalized LF and LF/HF ratio. In Cox analysis, as SDNN, RMSSD, and normalized HF tertiles increased, the risk of diabetes decreased [hazard ratios (95% confidence intervals) of tertile 3: 0.81 (0.70-0.95), 0.76 (0.65-0.90) and 0.78 (0.67-0.91), respectively], whereas the risk of diabetes increased in the case of heart rate, normalized LF, and LF/HF ratio [hazard ratios (95% confidence intervals) of tertile 3: 1.41 (1.21-1.65), 1.32 (1.13-1.53), and 1.31 (1.13-1.53), respectively] after adjusting for age, sex, body mass index, smoking, drinking, systolic blood pressure, lipid level, c-reactive protein, and homeostasis model assessment of insulin resistance.</p> <p><b>CONCLUSIONS</b></p> <p>Abnormal HRV, especially decreased vagal activity and deviation in sympatho-vagal imbalance to sympathetic activity, might precede incident diabetes.</p>

scholarly journals Decreased vagal activity and deviation in sympathetic activity precedes development of diabetes

2020 ◽  
Author(s):  
Da Young Lee ◽  
Mi Yeon Lee ◽  
Jung Hwan Cho ◽  
Hyemi Kwon ◽  
Eun-Jung Rhee ◽  
...  
Keyword(s):  
Heart Rate ◽  
Frequency Domain ◽  
Confidence Intervals ◽  
Sympathetic Activity ◽  
Reference Group ◽  
Lipid Level ◽  
Vagal Activity ◽  
Model Assessment ◽  
Diabetes Group ◽  
Hazard Ratios

<b>OBJECTIVE</b> <p>The objective of this study was to examine whether altered heart rate variability (HRV) could predict the risk of diabetes in Asians. </p> <p><b>RESEARCH DESIGN AND METHODS</b></p> <p>A cohort study was conducted in 54,075 adults without diabetes who underwent three-minute HRV measurement during health check-ups between 2011 and 2014 at Kangbuk Samsung Hospital. We analyzed the time domain [standard deviation of the normal-to-normal interval(SDNN) and root mean square difference(RMSSD)] and the frequency domain [total(TP), normalized low-frequency(LF), and normalized high-frequency(HF) power, and LF/HF ratio]. We compared the risk of diabetes until 2017 according to tertiles of heart rate and HRV variables, with tertile 1 serving as the reference group.</p> <p><b>RESULTS</b></p> <p>During 243,758.2 person-years, 1,369 subjects were diagnosed with diabetes. Both time and frequency domain variables were lower in the diabetes group, with the exception of those with normalized LF and LF/HF ratio. In Cox analysis, as SDNN, RMSSD, and normalized HF tertiles increased, the risk of diabetes decreased [hazard ratios (95% confidence intervals) of tertile 3: 0.81 (0.70-0.95), 0.76 (0.65-0.90) and 0.78 (0.67-0.91), respectively], whereas the risk of diabetes increased in the case of heart rate, normalized LF, and LF/HF ratio [hazard ratios (95% confidence intervals) of tertile 3: 1.41 (1.21-1.65), 1.32 (1.13-1.53), and 1.31 (1.13-1.53), respectively] after adjusting for age, sex, body mass index, smoking, drinking, systolic blood pressure, lipid level, c-reactive protein, and homeostasis model assessment of insulin resistance.</p> <p><b>CONCLUSIONS</b></p> <p>Abnormal HRV, especially decreased vagal activity and deviation in sympatho-vagal imbalance to sympathetic activity, might precede incident diabetes.</p>

scholarly journals Sleep Indices and Cardiac Autonomic Activity Responses during an International Tournament in a Youth National Soccer Team

2021 ◽  
Vol 18 (4) ◽  
pp. 2076
Author(s):  
Pedro Figueiredo ◽  
Júlio Costa ◽  
Michele Lastella ◽  
João Morais ◽  
João Brito
Keyword(s):  
Heart Rate ◽  
Frequency Domain ◽  
Sleep Duration ◽  
Time Domain ◽  
Soccer Players ◽  
Autonomic Activity ◽  
Male Youth ◽  
Youth Soccer ◽  
Wrist Actigraphy ◽  
Cardiac Autonomic Activity

This study aimed to describe habitual sleep and nocturnal cardiac autonomic activity (CAA), and their relationship with training/match load in male youth soccer players during an international tournament. Eighteen elite male youth soccer players (aged 14.8 ± 0.3 years; mean ± SD) participated in the study. Sleep indices were measured using wrist actigraphy, and heart rate (HR) monitors were used to measure CAA during night-sleep throughout 5 consecutive days. Training and match loads were characterized using the session-rating of perceived exertion (s-RPE). During the five nights 8 to 17 players slept less than <8 h and only one to two players had a sleep efficiency <75%. Players’ sleep duration coefficient of variation (CV) ranged between 4 and 17%. Nocturnal heart rate variability (HRV) indices for the time-domain analyses ranged from 3.8 (95% confidence interval, 3.6; 4.0) to 4.1 ln[ms] (3.9; 4.3) and for the frequency-domain analyses ranged from 5.9 (5.6; 6.5) to 6.6 (6.3; 7.4). Time-domain HRV CV ranged from 3 to 10% and frequency-domain HRV ranged from 2 to 12%. A moderate within-subjects correlation was found between s-RPE and sleep duration [r = −0.41 (−0.62; −0.14); p = 0.003]. The present findings suggest that youth soccer players slept less than the recommended during the international tournament, and sleep duration was negatively associated with training/match load.

Determinants of frequency domain measures of heart rate variability in the acute and convalescent phases of myocardial infarction

1994 ◽  
Vol 28 (8) ◽  
pp. 1273-1276 ◽  
Author(s):  
J. O Valkama ◽  
H. V Huikuri ◽  
K E J. Airaksinen ◽  
M. L Linnaluoto ◽  
J. T Takkunen
Keyword(s):  
Myocardial Infarction ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Frequency Domain

scholarly journals Heart Rate Variability and Cardiovascular Reflex Tests for Assessment of Autonomic Functions in Preeclampsia

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Meenakshi Chaswal ◽  
Raj Kapoor ◽  
Achla Batra ◽  
Savita Verma ◽  
Bhupendra S. Yadav
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Pregnant Women ◽  
Frequency Domain ◽  
Low Frequency ◽  
Normal Pregnancy ◽  
Total Power ◽  
Autonomic Functions ◽  
Cardiovascular Reflex ◽  
Cardiovascular Reflex Tests

Alterations in the autonomic cardiovascular control have been implicated to play an important etiologic role in preeclampsia. The present study was designed to evaluate autonomic functions in preeclamptic pregnant women and compare the values with normotensive pregnant and healthy nonpregnant controls. Assessment of autonomic functions was done by cardiovascular reflex tests and by analysis of heart rate variability (HRV). Cardiovascular reflex tests included deep breathing test (DBT) and lying to standing test (LST). HRV was analyzed in both time and frequency domain for quantifying the tone of autonomic nervous system to the heart. The time domain measures included standard deviation of normal R-R intervals (SDNN) and square root of mean squared differences of successive R-R intervals (RMSSD). In the frequency domain we measured total power (TP), high frequency (HF) power, low frequency (LF) power, and LF/HF ratio. Cardiovascular reflex tests showed a significant parasympathetic deficit in preeclamptic women. Among parameters of HRV, preeclamptic group had lower values of SDNN, RMSSD, TP, HF, and LF (ms2) and higher value of LF in normalised units along with high LF/HF ratio compared to normotensive pregnant and nonpregnant controls. Furthermore, normotensive pregnant women had lower values of SDNN, TP, and LF component in both absolute power and normalised units compared to nonpregnant females. The results confirm that normal pregnancy is associated with autonomic disturbances which get exaggerated in the state of preeclampsia.

scholarly journals The state of response of autonomic nervous system in children with mitral valve prolapse

2021 ◽  
Vol 26 (4) ◽  
pp. 74-80
Author(s):  
І.О.  Mitiuriaeva-Korniyko ◽  
O.V. Kuleshov ◽  
Ya.A. Medrazhevska ◽  
L.O. Fik ◽  
T.D. Klets
Keyword(s):  
Heart Rate ◽  
Nervous System ◽  
Autonomic Nervous System ◽  
Mitral Valve ◽  
Frequency Domain ◽  
Mitral Valve Prolapse ◽  
Low Frequency ◽  
Very Low Frequency ◽  
Autonomic Nervous ◽  
Significant Difference

The article presents summarized materials on connective tissue dysplasia of the heart, primary mitral valve prolapse, dysfunction of the autonomic system. Aim of research: to estimate the condition of autonomic nervous system in children with primary mitral valve prolapse. We examined 106 children with mitral valve prolapse aged from 13 to 17 years old on the clinical base of city hospital “Center of mother and child” in Vinnitsya. Research included time and frequency domain (evaluation with cardiointervalography. Final results were compared with the control group records. The results showed no statistical significance among time domain parameters in the main group of children. All these indices displayed tendency to sympathetic and parasympathetic autonomic nervous system tonus increase in boys. However, sympathicotonia tendency was noted in girls only. Frequency domain parameters showed similar results, compared with the previous. Nevertheless, very low frequency parameters had statistically significant difference in both subgroups of patience with mitral valve prolapse, including males (3205.8±190.9 against 1717±154, р<0.05) and females (3280±220.1 against 1433±811, р<0.05). There were no statistically significant difference among other frequency domain parameters. Conclusions: we estimated that children with mitral valve prolapse have imbalanced autonomic homeostasis manifested by tone disturbances of both autonomic vegetative system branches with sympathetic predominance. Patients with primary mitral valve prolapse generally have increased sympathetic tone - both boys and girls - according to spectral analysis of heart rate variability indices, heart rate oscillation power of a very low frequency in particular (p<0.05). In children with mitral valve prolapse, the tone of parasympathetic nervous system is generally normal; there is a tendency to its increase in boys and decrease in girls. These children should be under close medical supervision by pediatricians and cardiologists.

scholarly journals Can Frequency Domain Heart Rate Measures Detect Impaired Driver Performance?

2013 ◽  
Author(s):  
C Heinze ◽  
S Schirmer ◽  
U Trutschel ◽  
B Sirois ◽  
M Golz ◽  
...  
Keyword(s):  
Heart Rate ◽  
Frequency Domain ◽  
Driver Performance
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