State of the science: heart rate variability in health and disease

Joyce, David; Barrett, Michelle

doi:10.1136/bmjspcare-2018-001588

Cited by 12 publications

(12 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In this study, we did evaluate the HR and the HRV indexes regarding the circadian rhythm, but we believe this rhythm somehow influences the oscillations observed in the HRV and HR, as mentioned by Piccirillo et al [28]. Kovács et al [12], in a study assessing the behavior of the HRV indexes in bovines during the day and night periods, observed a predominance of sympathetic activity during active periods (day) and also during the summer, when both the HR and the spectral parameters presented a circadian rhythm.…”

Section: Discussionmentioning

confidence: 91%

“…The same system was used to record the neonatal ECG, but the positions of the electrodes was changed as follows: the green electrode was placed three centimeters from the sternum; the yellow and black electrodes were placed 20 and 30 cm below the withers on the left side of the thorax; and the red electrode was placed similarly to the yellow one, but on the right side of the thorax [12] (Figure 3). The data was registered during eight minutes and transferred to a computer via Bluetooth technology.…”

Section: Neonatal Heart Rate Variabilitymentioning

confidence: 99%

“…evaluated both during the day and during the night. In addition, as mentioned by Kovács et al[12], environmental factors, diet and locomotor activity may have influenced the results. Further studies are need to evaluate the circadian rhythm in lambs during their development, as well as assess the behavior of the HRV in lambs and its relationship with the circadian rhythm.For the interpretation of our results, we want to stress the importance of considering the stress factor involved, particularly in respect to the HRV indexes and the behavior of the HR.…”

mentioning

confidence: 90%

See 2 more Smart Citations

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

Cruz‐Aleixo

Lima

Albuquerque

et al. 2021

The Journal of Veterinary Medical Science

View full text Add to dashboard Cite

The evaluation of the autonomic cardiac functions may be performed through the analysis of the heart rate variability. Heart rate variability is defined as the fluctuations in the heart rhythm or rate, and represents a useful tool in the evaluation of the autonomic nervous system through the sympathetic and parasympathetic components, as well as its balance and its reflexes on the cardiorespiratory control system. Fetal electrocardiography provides important information regarding the well-being of the fetus since, in human fetuses, there are changes in the behavior of the fetal heart rate during the second and third trimesters of pregnancy due to an increase in parasympathetic activity. Therefore, considering the importance of evaluating fetal viability, this study aims at evaluating the behavior of fetal heart rate and heart rate variability in Dorper sheep, as well as the activity of the autonomic nervous system during fetal life and in newborn lambs. The species is often used in experimental studies and autonomic nervous system activity is a prognostic index, therefore, the diagnosis of modifications in the sympathovagal balance may represent an early index for fetal viability and well-being in lambs. The analyses were performed in 10 Dorper sheep during pregnancy and in 10 lambs after birth until 120 days of age. There was a decrease in the fetal heart rate and heart rate variability indexes during the fifth month of pregnancy, but without statistical significance for the period evaluated. The heart rate of the lambs decreased gradually until they were 21 days old. The indexes SDNN (standard deviation of RR intervals) and RMSSD (square root of the mean of successive differences between adjacent RR intervals) diverged according to age, being high at day 60. Fetal viability is relevant in sheep fetuses to avoid losses during pregnancy and risks to the health of the mother. In the species, there seems to be a predominance of parasympathetic activity starting from the 21st day of age. Heart rate variability may be employed as a tool in the evaluation of the fetus and development of lambs, since changes in its behavior may represent an adverse effect to fetal and neonatal health.

show abstract

Section: Discussionmentioning

confidence: 91%

Section: Neonatal Heart Rate Variabilitymentioning

confidence: 99%

mentioning

confidence: 90%

See 1 more Smart Citation

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

Cruz‐Aleixo

Lima

Albuquerque

et al. 2021

The Journal of Veterinary Medical Science

View full text Add to dashboard Cite

show abstract

“…A typical BCG signal of a healthy person is shown in Figure 2. There are three main types of HRV analysis methods based on BCG signals [34], including time domain analysis (for example, the standard deviation of the sinus heartbeat J-J interval), frequency domain analysis, and nonlinear analysis (such as Lyapunov exponent, complexity, approximate entropy).…”

Section: Computation Of Heart Rate and Hrv From Bcg Signalmentioning

confidence: 99%

A Practical Application for Quantitative Brain Fatigue Evaluation Based on Machine Learning and Ballistocardiogram

Yang

et al. 2021

Healthcare

View full text Add to dashboard Cite

Brain fatigue is often associated with inattention, mental retardation, prolonged reaction time, decreased work efficiency, increased error rate, and other problems. In addition to the accumulation of fatigue, brain fatigue has become one of the important factors that harm our mental health. Therefore, it is of great significance to explore the practical and accurate brain fatigue detection method, especially for quantitative brain fatigue evaluation. In this study, a biomedical signal of ballistocardiogram (BCG), which does not require direct contact with human body, was collected by optical fiber sensor cushion during the whole process of cognitive tasks for 20 subjects. The heart rate variability (HRV) was calculated based on BCG signal. Machine learning classification model was built based on random forest to quantify and recognize brain fatigue. The results showed that: Firstly, the heart rate obtained from BCG signal was consistent with the result displayed by the medical equipment, and the absolute difference was less than 3 beats/min, and the mean error is 1.30 ± 0.81 beats/min; secondly, the random forest classifier for brain fatigue evaluation based on HRV can effectively identify the state of brain fatigue, with an accuracy rate of 96.54%; finally, the correlation between HRV and the accuracy was analyzed, and the correlation coefficient was as high as 0.98, which indicates that the accuracy can be used as an indicator for quantitative brain fatigue evaluation during the whole task. The results suggested that the brain fatigue quantification evaluation method based on the optical fiber sensor cushion and machine learning can carry out real-time brain fatigue detection on the human brain without disturbance, reduce the risk of human accidents in human–machine interaction systems, and improve mental health among the office and driving personnel.

show abstract

“…A hipertensão, por sua vez, é uma condição crônica que pode levar a doenças cardíacas, acidente vascular cerebral, dentre outras doenças que podem resultar em morte prematura (KUNG;XU, 2015), além do que, valores elevados de VFC estão associados a uma menor taxa de morbimortalidade (GOIT; ANSARI, 2016). Além dessa relação entre hipertensão e VFC, um corpo crescente de literatura tem demonstrado consistentemente que a VFC pode ser um bom indicador de saúde geral, seja ela física ou emocional (JOYCE; BARRETT, 2019). O padrão da VFC é complexo, porém, no coração saudável, a VFC pode ser decomposta em um pequeno conjunto de oscilações sobrepostas.…”

Section: Introductionunclassified

Atividade Física, Pressão Arterial e Variabilidade da Frequência Cardíaca em Crianças e Adolescentes

et al. 2020

View full text Add to dashboard Cite

A atuação do sistema nervoso autonômico está diretamente associada à condição fisiológica geral, sendo utilizada inclusive como demarcador de condição clínica, bem como indicador de risco para doenças cardiovasculares. No entanto, os estudos dessas relações têm sido conduzidos prioritariamente em população adulta. Nesse sentido, o objetivo do estudo foi analisar a associação entre prática habitual de atividade física, pressão arterial (PA) e variabilidade da frequência cardíaca (VFC) em crianças e adolescentes em Londrina, Paraná, Brasil. Estudo apresenta delineamento transversal, de modo que a amostra foi composta por 42 alunos da rede estadual de ensino, de ambos os sexos com idade entre 10 e 17 anos. Avaliou-se a massa corporal e estatura. Foram coletados ainda valores de PA sistólica e diastólica, VFC e a prática habitual de atividades físicas (PHAF) em diferentes domínios (geral, tempo livre, lazer e escola). O teste qui-quadrado foi empregado para avaliar as associações. Não foram identificadas associações estatisticamente significativas entre as variáveis cardiovasculares e a PHAF. A prática geral de atividades físicas habituais, bem como seus diferentes domínios, sejam eles no lazer, escola e tempo livre, não se associaram à valores aumentados de pressão arterial, bem como com os indicadores do comportamento autonômico de crianças e adolescentes. Palavras-chave: Atividade Física. Pressão Arterial. Sistema Neural. Criança e Adolescente. Abstract The role of the autonomic nervous system is directly related to the general physiological condition, including being used as a clinical condition path as well as a risk indicator for cardiovascular diseases. However, studies of these relationships have been conducted primarily in the adult population. Thus, the study aimed to analyze the association among habitual practice of physical activity, blood pressure (BP) and heart rate variability (HRV) in children and adolescents from Londrina, Paraná, Brazil. The study presents a cross-sectional design so that the sample consisted of 42 students from the state school system, of both sexes, aged between 10 and 17 years. Body mass and height were evaluated. Systolic and diastolic BP values, HRV, and habitual physical activity (HPA) were also collected in different domains (general, free time, leisure, and school). The chi-square test was used to assess associations. No statistically significant associations were identified between cardiovascular variables and HPA. The general practice of habitual physical activities, as well as their different domains, either leisure, school, or free time, were not associated with increased blood pressure values, as well as with the indicators of the autonomic nervous system in children and adolescents. Keywords: Physical Activity. Blood Pressure. Neural System. Children and Adolescents.

show abstract

State of the science: heart rate variability in health and disease

Cited by 12 publications

References 9 publications

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

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

A Practical Application for Quantitative Brain Fatigue Evaluation Based on Machine Learning and Ballistocardiogram

Atividade Física, Pressão Arterial e Variabilidade da Frequência Cardíaca em Crianças e Adolescentes

Contact Info

Product

Resources

About