Correlates of the shift in heart rate variability with postures and walking by time–frequency analysis

Chan, Hsiao‐Lung; Lin, Ming-An; Chao, Pei-Kuang; Lin, Chun-Ching

doi:10.1016/j.cmpb.2007.02.003

Cited by 48 publications

(33 citation statements)

References 25 publications

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“…This is in agreement with [26], in which no significant changes in RR duration, LF and HF power were found in 18 normal subjects examined during independent walking. In agreement with our results, a previous investigation also reported that during progressive intensity of exercise, HF power was found substantially unchanged from rest up to 70% VO 2 max [28].…”

Section: Discussionsupporting

confidence: 94%

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Evaluation of the autonomic response in healthy subjects during treadmill training with assistance of a robot-driven gait orthosis

et al. 2009

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Section: Discussionsupporting

confidence: 94%

“…As expected, the change in posture from sitting to standing elicited a physiological response as indicated by a significant increase of heart rate [26]. However, no variation in spectral and symbolic indexes was observed, thus indicating that the change in posture did not produce an important effect on sympathetic and vagal modulations.…”

Section: Discussionmentioning

confidence: 53%

Evaluation of the autonomic response in healthy subjects during treadmill training with assistance of a robot-driven gait orthosis

et al. 2009

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“…However, a precise distribution of the normal response of blood pressure during orthostasis is not well documented. 16 In our study the mean systolic was lowest in standing and highest in supine posture and similarly the mean diastolic pressure was found to be increased in standing posture and much reduced in supine posture and the difference was found to be statistically significant and a similar type of results was also shown by a study done by Grethe S Tell et al, in his study he found that there was a slight decrease in systolic pressure and a significant increase in diastolic pressure. 17 Similar type of results was also published by a Japanese study and a Philadelphia study quoting a significant decrease in systolic pressure while standing from supine posture and significant increase in diastolic pressure from supine to standing posture.…”

Section: Discussionsupporting

confidence: 76%

Study on variation of blood-pressure in relation to posture among children aged 4-14 years

Ragu

Siddhuraj

Kasimani

et al. 2017

Int J Contemp Pediatr

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INTRODUCTIONCurrently we are in the phase of epidemiological transition mainly due to the change in life style and the growing economy and so we are witnessing an increase in the prevalence of obesity and high blood pressure not only in adults but also in children.The response of blood pressure to change in body position has been used in epidemiological studies as a measure of cardiovascular reactivity.Sparrow et al studies the variation of blood pressure in different postures among the adults and finally reported that a 10-mm Hg or greater increase in diastolic blood pressure (DBP) from the supine to standing position significantly modified the effect of seated systolic blood ABSTRACT Background: The response of blood pressure to change in body position has been used in epidemiological studies as a measure of cardiovascular reactivity. Studies had shown that the difference between the supine and seated blood pressures is positively associated with subsequent development of systemic hypertension independent of supine blood pressure. Objective of present study is to study the variation in blood pressure among children in the age group of 4-14 years in relation to the change in their posture. Methods: A cross-sectional study was conducted in a rural area near our medical college hospital. A primary and middle school in that area was selected for our study. A total of 500 children in the age group of 4 -14 years were included in our study. Demographic profile was recorded for all children. Height, weight and BMI were measured. Blood pressure measurement was done by using the auscultation method and with appropriate sized blood pressure cuff.Results: The blood pressure shows a gradual increase as the age of the study subjects increases and there was no statistically significant difference in the blood pressure between males and females (p>0.05). Supine posture shows a comparatively higher systolic pressure and a lower diastolic pressure reading than the sitting and standing posture. The mean difference in systolic blood pressure between sitting and supine posture was less than the mean difference between sitting and standing and the mean difference between supine and standing, which was found to be very high and a similar type of result was also shown in the diastolic blood pressure and this mean difference between the postures was found to be statistically significant (p<0.05). Conclusions: Postural changes in systolic and diastolic deserve further study as a potential risk factor for the development of hypertension as this could be easily measured in clinical practice and in epidemiological studies.

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“…First, we examined several vagal characteristics by examining not only vagal baseline, but also reactivity to the CFT (acute vagal stimulation) and the MIST-S (acute vagal inhibition). Second, by favoring the MIST-S over other strong stressors known to induce a multidimensional stress response (e.g., Trier Social Stress Test, TSST; Kirschbaum, Pirke, & Hellhammer, 1993), several potentially disruptive factors such as postural changes or walking (Chan, Lin, Chao, & Lin, 2007;Nater, La Marca, Florin, Moses, Langhans, Koller, & Ehlert, 2006), and vocalization (Bernardi, Wdowczyk-Szulc, Valenti, Castoldi, Passino, et al, 2000;Sloan, Korten, & Myers, 1991) were controlled for. Therefore, the MIST-S seems particularly useful to investigate the relationship between different response variables that are not equally susceptible to the potentially disruptive factors.…”

Section: Discussionmentioning

confidence: 99%

Association between Cold Face Test‐induced vagal inhibition and cortisol response to acute stress

et al. 2011

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Low vagal function is related to several disorders. One possible underlying mechanism linking the vagus nerve and disorders is the HPA axis. Thirty-three healthy male subjects participated in a stress task, while heart rate (HR), respiratory sinus arrhythmia (RSA), salivary cortisol, and mood were assessed. Vagal function was determined using baseline, stress-induced inhibition, and Cold Face Test (CFT)-induced stimulation. The stress task induced a significant increase in cortisol and HR, a decrease in RSA, and a worsening of mood. A linear regression model with the time from CFT onset until maximum bradycardia as the independent variable explained 17.9% of the total variance in cortisol in response to the stressor (mood: 36.5%). The results indicate that a faster CFT response is associated with reduced cortisol increase and enhanced mood after acute stress. Our data support an inverse relationship between vagal function and the HPA axis.

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Correlates of the shift in heart rate variability with postures and walking by time–frequency analysis

Cited by 48 publications

References 25 publications

Evaluation of the autonomic response in healthy subjects during treadmill training with assistance of a robot-driven gait orthosis

Evaluation of the autonomic response in healthy subjects during treadmill training with assistance of a robot-driven gait orthosis

Study on variation of blood-pressure in relation to posture among children aged 4-14 years

Association between Cold Face Test‐induced vagal inhibition and cortisol response to acute stress

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