Heart rate variability explored in the frequency domain: A tool to investigate the link between heart and behavior

Montano, Nicola; Porta, Alberto; Cogliati, Chiara; Costantino, Giorgio; Tobaldini, Eleonora; Casali, Karina Rabello; Iellamo, Ferdinando

doi:10.1016/j.neubiorev.2008.07.006

Cited by 381 publications

(331 citation statements)

References 93 publications

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“…HRV is a validated, non-invasive method to study the influence of the autonomic nervous system (ANS) on the heart. The parasympathetic and sympathetic nerves act on the intrinsic rhythm, and this causes beat to beat variations in the RR interval on the ECG [18,29,30].…”

Section: Methodsmentioning

confidence: 99%

“…LF (nu) represents the relative power of the LF component in proportion to the total power minus the VLF component. HF (nu) represents the relative power of the HF component in proportion to the total power minus the VLF component, while LF/HF is used to assess the fractional distribution of power [30]. The Poincarè analysis method produced the indicators SD1 and SD2.…”

Section: Hrv Quantificationmentioning

confidence: 99%

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Effect of exercise on cardiac autonomic function in females with rheumatoid arthritis

et al. 2012

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The objective of this study is to evaluate the effect of exercise on cardiac autonomic function as measured by short-term heart rate variability (HRV) in females suffering from rheumatoid arthritis (RA). Females with confirmed RA were randomly assigned to an exercise group (RAE) and a sedentary group (RAC). RAE was required to train under supervision two to three times per week, for 3 months. Three techniques (time domain, frequency domain and Poincaré plot analyses) were used to measure HRV at baseline and study completion. At baseline, RAC (n018) had a significantly higher variability compared to RAE (n019) for most HRV indicators. At study completion, the variables showing significant changes (p00.01 to 0.05) favoured RAE in all instances. Wilcoxon signed rank tests were performed to assess changes within groups from start to end. RAE showed significant improvement for most of the standing variables, including measurements of combined autonomic influence, e.g. SDRR (p00.002) and variables indicating only vagal influence, e.g. pNN50 (p00.014). RAC mostly deteriorated with emphasis on variables measuring vagal influence (RMSSD, pNN50, SD1 and HF (ms 2 )). Study results indicated that 12 weeks of exercise intervention had a positive effect on cardiac autonomic function as measured by short-term HRV, in females with RA. Several of the standing variables indicated improved vagal influence on the heart rate. Exercise can thus potentially be used as an instrument to improve cardiac health in a patient group known for increased cardiac morbidity.

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Section: Methodsmentioning

confidence: 99%

Section: Hrv Quantificationmentioning

confidence: 99%

Effect of exercise on cardiac autonomic function in females with rheumatoid arthritis

et al. 2012

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“…Montano et al (2009) showed that the IR technique, especially on the extremities of the body, is relevant to the study of feed efficiency of steers. This method is suitable for studies focused on the impact of external conditions on the thermoregulation abilities of cattle, whether the measurements are taken from the skin (Pusta et al, 2012) or the udder (Berry et al, 2003).…”

Section: Temperature Measurement With Non Invasive -No Contact Sensorsmentioning

confidence: 99%

A Review of Methods to Measure Animal Body Temperature in Precision Farming

Sellier¹,

Guettier²,

Staub³

2014

AJAST

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Automation of phenotypic measurements of livestock has become a more important goal for scientists and also for farmers who need a more precise, real-time knowledge of their animals. Among physiological measures, body temperature and its variations are key indicators of the physiological health and well-being of animals. Although measuring the body temperature may seem a trivial matter, its implementation is faced with many difficulties both at biological and technological levels in a field of constant progress. Today, there are many studies reporting taking temperature measurements without restraining animals. The present report focuses on the two main approaches to temperature measurements that use direct contact or radiation sensors. Specifically, we investigated the use of thermocouples, thermistors and infrared radiation sensors. A wide literature review using one of these techniques was conducted in which different animal species, different purposes, different experimental designs, various equipments, and different devices and gold standard methods are discussed. These technologies will continue their dizzying development, leading to new communication protocols, sensors miniaturization and a more efficient management of energy. These developments will have a direct impact on the increase of reading distances and the amount of information stored. In response to the request of farmers and researchers, integrated monitoring systems are already marketed with user-friendly interfaces and softwares for complex data storage and treatments.

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“…Preoperation and sham operation groups were used as control. ventrolateral medulla (RCLM) [16][17][18][19][20][21][22][23][24], the nucleus of solitary tract (NTS) [7,25] and paraventricular nucleus (PVN) [26]. The PVN connects these areas in the brain involved in cardiovascular function, forming important neuroendocrine and autonomic modulation, which further modulates the homeostasis of the body through the brain stem, spinal cord, median eminence and posterior pituitary.…”

Section: Discussionmentioning

confidence: 99%

“…The PVN connects these areas in the brain involved in cardiovascular function, forming important neuroendocrine and autonomic modulation, which further modulates the homeostasis of the body through the brain stem, spinal cord, median eminence and posterior pituitary. A recent report by de Abreu indicated that neurons in the PVN could contribute to cardiac autonomic modulation by changing parasympathetic or sympathetic activity [5,22,23,27]. Also, the interplay between the sympathetic and vagal outflows may be assessed by cardiovascular rhythmicity with appropriate spectral methodologies [28,29].…”

Section: Discussionmentioning

confidence: 99%

Influence of the hypothalamic paraventricular nucleus (PVN) on heart rate variability (HRV) in rat hearts via electronic lesion

Deng

Feng

et al. 2015

BME

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Abstract. Previous literatures have indicated that hypothalamic paraventricular nucleus (PVN) neurons are important for regulating the level of sympathetic and vagal nervous activity. Sympathovagal balance is closely related to heart rate variability (HRV). However, it still requires further elucidation regarding the effect of PVN on HRV by regulating sympathovagal balance. To detect the influence of the PVN on HRV, we evaluated the changes in time domain (including standard deviation of the R-R intervals (SDNN), and the root mean square of successive differences (RMSSD)) and frequency domain (including low frequency (LFnu), high frequency (HFnu) and the ratio of LF/HF) in HRV upon appropriate electronic stimulation, and lesions on the PVN of the rat in vivo. Cardiac vagal modulation was evaluated by HFnu; sympathetic modulation was evaluated by LFnu. Sympathovagal balance was evaluated by LF/HF and SDNN. Upon electronic stimulating (less than 0.6 mA) to the PVN of rats, we found that LFnu and HFnu changed correspondingly but recovered after the stimulation. When the PVN of the rats was injured, the RR intervals were enhanced with the rats' unilaterally or bilaterally injured PVN, especially the bilateral lesion. Meanwhile, LFnu, LF/HF and SDNN decreased gradually, accompanied with an increase of HFnu levels. So these PVN changes may indicate alterations of the sympathovagal balance.

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Heart rate variability explored in the frequency domain: A tool to investigate the link between heart and behavior

Cited by 381 publications

References 93 publications

Effect of exercise on cardiac autonomic function in females with rheumatoid arthritis

Effect of exercise on cardiac autonomic function in females with rheumatoid arthritis

A Review of Methods to Measure Animal Body Temperature in Precision Farming

Influence of the hypothalamic paraventricular nucleus (PVN) on heart rate variability (HRV) in rat hearts via electronic lesion

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