Reproducibility of heart rate variability parameters measured in healthy subjects at rest and after a postural change maneuver

Dantas, Eduardo Miranda; Gonçalves, Cristine; Silva, A.B.T.; Rodrigues, Sérgio Lamêgo; Ramos, Melissa; Andreão, Rodrigo Varejão; Pimentel, Enildo Broetto; Lunz, Wellington; Mill, José Geraldo

doi:10.1590/s0100-879x2010007500101

Cited by 34 publications

(33 citation statements)

References 32 publications

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“…3,17,18 In recent years, high frequency (HF) and low frequency (LF) spectra of the HRV have been employed to study the dynamic regulation of pacemaking activity. [19][20][21][22] In this study, we provide further evidence that the pacemaker activity and histological distribution of the isolated sinus venosus of the toad may be affected by ACh. We also observed that there were distinct changes of the pacemaker activity when the isolated sinus venosus was treated with ivabradine, the I f current inhibitor, whereas HRV change was significant distinctly with the increase of ACh and ivabradine concentration.…”

Section: Introductionsupporting

confidence: 55%

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Identification and detection of the isolated sinus venosus from the Asian toad

Deng

Guan

Wang

et al. 2013

Cell Biochemistry & Function

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The pacemaker activity of mammalian sinoatrial node (SAN) of the heart plays a fundamental role in the integration of vital functions. Studying factors such as drugs that influence pacemaker activity of SAN has its significance. In this study, we isolated sinus venosus, SAN from toads (Bufo gargarizans), and analysed its electronic signal, histological characteristics and the influence of acetylcholine (ACh) and ivabradine on its pacemaker activity using PowerLab® and Chart® 5.0 software. We found that when isolated sinus venosus was treated with ACh, its histological distribution was disorganized and inter-beat (RR) interval was also broadened. The high frequency normalized unit (HFnu) and Poincaré plot of heart rate variability (HRV) of the isolated sinus venosus was also altered upon ACh treatment in a time-dependent and dose-dependent manner. When treated with ivabradine, these parameters of HRV such as square root of the mean of the squared differences between adjacent NN intervals (RMSSD) and HFnu were in the upward tendency, but low frequency normalized unit and low frequency/high frequency were in the opposite tendency. Taken together, we have developed a new model for studying the influences of drugs on autorhythmicity using isolated sinus venosus of the toad. With this model, we showed that ACh and ivabradine may affect the pacemaker activity by stimulating muscarinic receptor or inhibiting If current, respectively.

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Section: Introductionsupporting

confidence: 55%

“…As the sinus venosus possesses plenty of adrenergic and muscarinic receptors, the influence of vagal input on pacemaking activity could be observed much distinctively . In recent years, high frequency (HF) and low frequency (LF) spectra of the HRV have been employed to study the dynamic regulation of pacemaking activity …”

Section: Introductionmentioning

confidence: 99%

Identification and detection of the isolated sinus venosus from the Asian toad

Deng

Guan

Wang

et al. 2013

Cell Biochemistry & Function

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“…The transition from a decubitus position to a sitting position causes sympathetic stimulation, an increase in LF, and a decrease in HF (30)(31)(32). In contrast to the studies above, we immediately placed the patients into a slight sitting position after subarachnoid block.…”

Section: Discussionmentioning

confidence: 99%

A comparison of the effects of hyperbaric and isobaric bupivacaine spinalanesthesia on hemodynamics and heart rate variability

Toptaş¹,

Uzman²,

İŞİTMEZ³

et al. 2014

Turk J Med Sci

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Molecular Electric Multipole Moment (MEMM) integrals have been derived for diatomic molecular systems, and then some lower multipole moments as dipole moments and quadrupole moments have been calculated for some diatomic molecules. The calculations have been performed by using our analytical formula over Slater-Type orbitals (STOs) with Cade and Huo's basis sets and the GAMESS program package working with Gaussian-Type basis sets (GTOs). The expressions which involve factorials are given in terms of binomial coefficients in order to speed up calculations. The results have been obtained in agreement with data found in the literature.

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“…The CV reported in this study during FLPA (19.99 and 29.05% for sitting and walking, respectively) is considerably higher compared to the CV of 12.27% found in the supine position of the OT in this study. Although our study design did not allow us to measure reliability of RMSSD in the standing position, high levels of reliability have previously been reported for this position [9]. It seems reasonable to infer that measuring HRV should be done in standardized conditions in order to obtain reliable and valid values that could be used to monitor training status.…”

Section: Discussionmentioning

confidence: 89%

Reliability and validity of time domain heart rate variability during daily routine activities – an alternative to the morning orthostatic test?

Mesquita

Kyröläinen

Olstad

2017

Biomedical Human Kinetics

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SummaryStudy aim: To determine the reliability and validity of a time domain heart rate variability (HRV) index during free-living physical activity (FLPA). Material and methods: Eight white-collar workers participated in this study. RR intervals (time between consecutive R-peaks of the PQRS complex) were recorded using the Polar V800 heart rate (HR) monitor upon awakening and at work on 16 different days. A total of 127 cycles of sitting periods followed by walking breaks were included for consecutive pairwise analysis for reliability. The HR values from the orthostatic test (OT) were compared with the corresponding values at work. Results:The HR values showed high levels of repeatability [the coefficient of variation (CV) during sitting and walking at work was 4.71 and 3.99%, respectively, with a typical error (TE) of 3.73 (3.34-4.25) and 3.65 (3.31-4.09)], but they did not correlate with the corresponding OT HR upon awakening (r = 0.28 for supine vs. sitting and r = 0.05 for standing vs. walking, p > 0.05). The root-mean-square difference of successive normal RR (RMSSD) was revealed not to be repeatable [CV values during sitting and walking were 19.99 and 29.05%, respectively, with a TE of 7.9 (7.15-8.85) and 9.43 (8.53-10.57)]. Conclusions: Analyzing RMSSD from daily routine activities was not reliable, and therefore validity cannot be assumed. RMSSD should therefore be calculated from RR intervals recorded in standardized conditions, such as during the OT upon awakening.

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Reproducibility of heart rate variability parameters measured in healthy subjects at rest and after a postural change maneuver

Cited by 34 publications

References 32 publications

Identification and detection of the isolated sinus venosus from the Asian toad

Identification and detection of the isolated sinus venosus from the Asian toad

A comparison of the effects of hyperbaric and isobaric bupivacaine spinalanesthesia on hemodynamics and heart rate variability

Reliability and validity of time domain heart rate variability during daily routine activities – an alternative to the morning orthostatic test?

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