scholarly journals HRV-based Stress Level Assessment Using Very Short Recordings

2017 ◽  
Vol 61 (3) ◽  
pp. 238 ◽  
Author(s):  
Ákos Jobbágy ◽  
Miklós Majnár ◽  
Lilla K. Tóth ◽  
Péter Nagy
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Stress Level ◽  
Time Domain ◽  
Good Measure ◽  
Test Results ◽  
Medical Test ◽  
Electrocardiographic Signal ◽  
The Time Domain ◽  
Actual Stress

The increased stress level of an individual often influences the medical test results. Heart rate variability (HRV) can be used to characterize stress level. Parameters in the time domain are preferred, as they make the assessment possible from relatively short (3 - 5 minute-long) recordings. Electrocardiographic signal (ECG) in Einthoven I lead and photoplethysmographic signal (PPG) at the fingertip were recorded in parallel. This paper analyzes the differences between the lengths of successive heart cycles (NN); the ratio of these differences exceeding 50 ms (pNN50) is considered to be a good measure of stress. The parameter triplet pNNtri has been defined dividing the differences of successive NN intervals into three categories: pNN0_20 (0 – 20 ms), pNN20_50 (20  – 50 ms) and pNN50 (greater than 50 ms). pNNtri characterizes the actual stress level significantly better (especially for senior persons) than pNN50 alone. NN intervals determined from PPG differ from those determined from ECG recorded in parallel.

Time domain parameters of heart rate variability in children born as small-for-gestational age

2016 ◽  
Vol 27 (4) ◽  
pp. 663-670 ◽  
Author(s):  
Agata Zamecznik ◽  
Jerzy Stańczyk ◽  
Agnieszka Wosiak ◽  
Katarzyna Niewiadomska-Jarosik
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Nervous System ◽  
Gestational Age ◽  
Time Domain ◽  
Small For Gestational Age ◽  
Age Group ◽  
Lower Heart Rate ◽  
Appropriate For Gestational Age ◽  
The Time Domain

AbstractAccording to metabolic programming theory, small-for-gestational age patients are at high risk of cardiovascular diseases also because of the possible malfunction of the autonomic nervous system. Autonomic disorders can be assessed by heart rate variability. The aims of this study were to compare time domain parameters of heart rate variability in children born as small-for-gestational age and appropriate-for-gestational age and to assess the correlation of the postnatal and current somatic parameters with the time domain parameters. The small-for-gestational age group consisted of 68 children aged 5–10 years who were born with birth weight below the 10th percentile. The appropriate-for-gestational age group consisted of 30 healthy peers, matched in terms of gender and age. On the basis of Holter monitoring, slightly higher average heart rate was observed in the small-for-gestational age group than in the appropriate-for-gestational age group. It was found that all the time domain parameters (SDNN, SDNNi, SDANNi, rMSSD, pNN50) were lower in the small-for-gestational age group than in the appropriate-for-gestational age group. In the small-for-gestational age group, girls had lower heart rate and some of the heart rate variability parameters (SDNN, SDNNi, SDANNi) in comparison with boys.Children born as small-for-gestational age have impaired function of the autonomic nervous system. Moreover, in the small-for-gestational age group, autonomic balance moved towards the sympathetic component, which was evidenced by higher heart rate. Children with faster heart rate and lower heart rate variability parameters may be at risk of cardiovascular disease.

scholarly journals Acute effect of different trainings in the variability of the heart rate of young football players

2020 ◽  
Vol 39 (2) ◽  
Author(s):  
Ramiz Arabaci ◽  
Emirhan Pehlivan ◽  
Recep Gorgulu
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Time Domain ◽  
Significant Interaction ◽  
Acute Effect ◽  
Football Players ◽  
Warm Up ◽  
The Time Domain

Objective:  To determine the time-domain (SDNN, RMSSD) of heart rate variability (HRV) and heart rate (HR) of young football players in different training sessions. Method: 15 football players voluntarily participated (mean age = 15.5 ± 0.5 years, height= 171.1 ± 7.9 cm, weight= 62.4 ± 8.9 kg, BMI= 21.2 ± 1.9 kg/m2).  They performed three different training:  speed, coordination, and match formation. The HRV and HR of the participants were measured during warm-up, main training, and cool-down in each of the three different training sessions. Results:  There was a significant interaction between time and intervention on RMSSD (Frmat= 2.983) and HR (Frmat t= 4.894). The results show that HR and HRV are affected differently by diverse training practices in football.

Changes in the Time-Domain of Heart Rate Variability and Corticosterone after Surgical Trauma to the Nasal Septum in Rats

2021 ◽  
Vol 499 (1) ◽  
pp. 247-250
Author(s):  
I. V. Kastyro ◽  
V. I. Popadyuk ◽  
I. V. Reshetov ◽  
M. G. Kostyaeva ◽  
S. G. Dragunova ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Time Domain ◽  
Nasal Septum ◽  
Surgical Trauma ◽  
The Time Domain

scholarly journals Heart rate variability indices in the time domain in healthy dogs supplemented with omega n-3

2014 ◽  
Vol 35 (4Supl) ◽  
pp. 2453 ◽  
Author(s):  
Thiago Hideky Yamauti dos Santos ◽  
Maíra Mont`Alvão Guedes de Araújo ◽  
Renato Souza Gonçalves ◽  
Mateus José Sudano ◽  
Luiz Henrique De Araújo Machado ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Time Domain ◽  
Healthy Dogs ◽  
The Time Domain
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