Efeitos agudos do tabagismo sobre a modulação autonômica: análise por meio do plot de poincaré

Manzano, Beatriz Martins; Vanderlei, Luiz Carlos Marques; Ramos, Ercy Mara Cípulo; Ramos, Dionei

doi:10.1590/s0066-782x2011005000013

Cited by 30 publications

(12 citation statements)

References 36 publications

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“…Lagged Poincaré plot analysis showed a significant increase in SD1, SD12 with higher lag numbers post stimulation thus indicating an increase in parasympathetic modulation. Previous studies with HRV analysis using Lagged Poincaré plot have shown a decrease in Vagal modulation (SD1, SD12) with exposure to hazardous stimulus like smoking and disease conditions like diabetes [32, 33]. So, it can be argued this post stimulus improvement in parasympathetic modulation, measured by SD1, SD12, is a favorable outcome of the stimulus.…”

Section: Discussionmentioning

confidence: 97%

Effect of Rotating Acoustic Stimulus on Heart Rate Variability in Healthy Adults

Roy

Choudhuri

Pandey³

et al. 2012

TONEUJ

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Acoustic stimulus can modulate the Autonomic Nervous System. However, previous reports on this topic are conflicting and inconclusive. In this study we have shown, how rotating acoustic stimulus, a novel auditory binaural stimulus, can change the autonomic balance of the cardiac system. We have used Heart rate Variability (HRV), an indicator of autonomic modulation of heart, both in time and frequency domain to analyze the effect of stimulus on 31 healthy adults.A decrease in the heart rate accompanied with an increase in SD and RMSSD indices on linear analysis was observed post-stimulation. In the Poincaré Plot, Minor Axis (SD1), Major Axis (SD2) and the ratio SD12 (SD1/SD2) increased after the stimulation. Post stimulus greater increment of SD12 with higher lag numbers of (M) beat to beat intervals, when compared to pre stimulus values, resulted in increased curvilinearity in the SD12 vs. Lag number plot. After stimulation,value of exponent alpha of Dretended Flactuation Analysis of HRV was found to be decreased. From these characteristic responses of the heart after the stimulus, it appears that rotating acoustic stimulus may be beneficial for the sympathovagal balance of the heart.

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Section: Discussionmentioning

confidence: 97%

Effect of Rotating Acoustic Stimulus on Heart Rate Variability in Healthy Adults

Roy

Choudhuri

Pandey³

et al. 2012

TONEUJ

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“…Following digital filtering complemented with manual filtering for the elimination of premature ectopic beats and artifacts, at least 256 R–R intervals were used for the data analysis. Only series with more than 95% sinus rhythm was included in the study [15-17]. HRV was analyzed at four moments: seated rest with spontaneous breathing, 0–5 minutes, 5–10 minutes and 10–15 minutes at standing position.…”

Section: Methodsmentioning

confidence: 99%

Fractal correlation property of heart rate variability in response to the postural change maneuver in healthy women

Souza¹,

Cisternas²,

Abreu³

et al. 2014

Int Arch Med

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BackgroundWe evaluated the effects of the PCM on the fractal analysis of the HRV in healthy womenMethodWe evaluated healthy women between 18 and 30 years old. HRV was analyzed in the time (SDNN, RMSSD, NN50 and pNN50) and frequency (LF, HF and LF/HF ratio) domains as well as short and long-term fractal exponents (alpha-1 and alpha-2) of the detrended fluctuation analysis (DFA). HRV was recorded at rest for ten minutes at seated rest and then the women quickly stood up from a seated position in up to three seconds and remained standing for 15 minutes. HRV was recorded at the following time: rest, 0–5 min, 5–10 min and 10–15 min during standing.ResultsWe observed decrease (p < 0.05) in the time-domain indices of HRV between seated and 10–15 minutes after the volunteer stood up. The LF (ms2) and HF (ms2) indices were also reduced (p < 0.05) at 10–15 minutes after the volunteer stood up compared to seated while the LF (nu) was increased at 5–10 min and 10–15 min (p < 0.05). The short-term alpha-1 exponent was increased (p < 0.05) at all moments investigated compared to seated. Increase in the properties of short-term fractal correlations of heart rate dynamics accompanied by a decrease in the parasympathetic modulation and global HRV was observed in response to the postural change maneuver.ConclusionWe suggest that fractal analysis of HRV is more sensitive than frequency and time-domain analysis of HRV during the postural change maneuver.

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“…No exclusion criteria were applied regarding behaviours that are known to influence heart rate variability (HRV) and GSR, such as coffee consumption less than 2 h before the start of the experiment (11 participants), or being a smoker (2 participants) (Barutcu et al 2005;Manzano et al 2011;Villarejo, Zapirain, and Zorrilla 2012). However, it was not permitted to smoke or drink coffee in between the experimental sessions.…”

Section: Present Studymentioning

confidence: 99%

What determines drivers’ speed? A replication of three behavioural adaptation experiments in a single driving simulator study

et al. 2018

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We conceptually replicated three highly cited experiments on speed adaptation, by measuring drivers' experienced risk (galvanic skin response; GSR), experienced task difficulty (self-reported task effort; SRTE) and safety margins (time-to-line-crossing; TLC) in a single experiment. The three measures were compared using a nonparametric index that captures the criteria of constancy during self-paced driving and sensitivity during forced-paced driving. In a driving simulator, 24 participants completed two forced-paced and one self-paced run. Each run held four different lane width conditions. Results showed that participants drove faster on wider lanes, thus confirming the expected speed adaptation. None of the three measures offered persuasive evidence for speed adaptation because they failed either the sensitivity criterion (GSR) or the constancy criterion (TLC, SRTE). An additional measure, steering reversal rate, outperformed the other three measures regarding sensitivity and constancy, prompting a further evaluation of the role of control activity in speed adaptation. Practitioner Summary: Results from a driving simulator experiment suggest that it is not experienced risk, experienced effort or safety margins that govern drivers' choice of speed. Rather, our findings suggest that steering reversal rate has an explanatory role in speed adaptation.

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Efeitos agudos do tabagismo sobre a modulação autonômica: análise por meio do plot de poincaré

Abstract: Background: Smoking affects the autonomic function.

Cited by 30 publications

References 36 publications

Effect of Rotating Acoustic Stimulus on Heart Rate Variability in Healthy Adults

Effect of Rotating Acoustic Stimulus on Heart Rate Variability in Healthy Adults

Fractal correlation property of heart rate variability in response to the postural change maneuver in healthy women

What determines drivers’ speed? A replication of three behavioural adaptation experiments in a single driving simulator study

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