heart rate variability of healthy fetuses pdf
Assessment and quantification of foetal electrocardiography and heart rate variability of normal foetuses from early to late gestational periods 4
... advantage of the percent plot is that it gives an indication of the magnitude of the difference with reference to its mean Comparison of novel versus commercial HRV softwares 184 value, independent of ... standard deviation of the differences (indicated by the spreading out of Comparison of novel versus commercial HRV softwares 188 Table 11-2: Bland-Altman analysis (mean difference) of time- and frequencydomain ... the HRV values may be due to the different levels of accuracy in removal of non-sinus beats This demonstrates the importance of the processing of artifact beats, especially in foetal RR-intervals...
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Assessment and quantification of foetal electrocardiography and heart rate variability of normal foetuses from early to late gestational periods 3
... Heart rate variability of healthy foetuses 153 CHAPTER 10 HEART RATE VARIABILITY OF HEALTHY FOETUSES Heart rate variability of healthy foetuses 154 Introduction Evaluation of foetal heart rate ... gestation progresses Hence, one of the aims of this study was to evaluate the longitudinal changes in HRV Heart rate variability of healthy foetuses 155 of a cohort of healthy foetuses at regular ... week of gestation showed the baseline foetal heart rate (fHR) as 60-70 bpm Clinical application of non-invasive foetal ECG 132 Figure 8-2: The foetal heart rate (fHR) and maternal heart rate...
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Assessment and quantification of foetal electrocardiography and heart rate variability of normal foetuses from early to late gestational periods 2
... compared to the foetus The mean heart rate of 119 beats ECG of healthy foetuses 123 per minute (bpm) in the neonates was significantly lower than the mean heart rate of 138 bpm in ≥ 37 week-old foetuses ... dependent on the underlying heart rate A lower heart rate (longer RR intervals) has a higher chance of adjacent intervals differing by more than 50 ms than a higher heart rate (shorter RR intervals) ... using Prism 4.03 for Windows (GraphPad Software Inc., San Diego, CA, USA) 98 ECG of healthy foetuses CHAPTER CARDIAC TIME INTERVALS OF HEALTHY FOETUSES ECG of healthy foetuses 99 Introduction As...
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Assessment and quantification of foetal electrocardiography and heart rate variability of normal foetuses from early to late gestational periodsb 1
... Chapter Heart rate variability …………………………………… 35 Definition of heart rate variability ………………………………… 36 History of heart rate variability …………………………………… 36 Measurement of heart rate variability …………………………… ... Physiological significance of heart rate variability ……………… 48 4.1 Components of heart rate variability …………………… 49 4.2 Estimate of vagal activity…………………………………… 50 4.3 Estimate of sympathetic activity…………………………… ... Central control of foetal heart rate ……………………… 62 2.4 Different maturation rates of the autonomic branches……… 63 Causes of foetal heart rate variability …………………………… 64 Measurement of foetal HRV…………………………………………...
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Assessment and quantification of foetal electrocardiography and heart rate variability of normal foetuses from early to late gestational periods 5
... KA Prospective study of heart rate variability and mortality in chronic heart failure: results of the United Kingdom heart failure evaluation and assessment of risk trial (UKheart) Circulation ... frequency domain measures of heart rate variability J Med Eng Technol 2001; 25(6): 240-8 64 Carter JB, Banister EW, Blaber AP The effect of age and gender on heart rate variability after endurance ... analysis of the heart rate of the human foetus at 26 and 36 weeks of gestation Clin Phys Physiol Meas 1989; 10 Suppl B: 57-60 108 Firpo C, Hoffman JI, Silverman NH Evaluation of foetal heart dimensions...
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Báo cáo hóa học: " Research Article Time-Frequency Analysis of Heart Rate Variability for Neonatal Seizure Detection" pdf
... interpolated using cubic splines The instantaneous heart rate (IHR) is the inverse of the RR interval and shows the variability of heart rate Figure shows examples of IHR coinciding with the nonseizure and ... is the nonstationary behavior of heart beats Even for a normal healthy person, the heart beats tend to be timevariant This is because the interbeat interval of the heart rhythm varies markedly ... at a sampling rate of Hz Finally, the linear trend of the time series was removed The outcome of the preprocessing stage constitutes the HRV used in the analysis 3.3 Selection of the optimal...
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báo cáo hóa học: " Effect of predictive sign of acceleration on heart rate variability in passive translation situation: preliminary evidence using visual and vestibular stimuli in VR " ppt
... rest of the experiment All of the other subjects completed the observation and almost none of them reported a feeling of motion sickness Two of the 21 subjects reported the lowest degree of nausea ... Circular vection as a function of the relative sizes, distances, and positions of two competing visual displays Perception 1989, 18:657-665 Sayers BM: Analysis of heart rate variability Ergonomics 1973, ... sixteen minutes of ECG data We then calculated the time interval from one R wave to the next (Figure 2a) The set of these intervals, which we called "R-R intervals," shows the heart rate variability...
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Báo cáo y học: "Clinical review: A review and analysis of heart rate variability and the diagnosis and prognosis of infection" pps
... association with heart rate variability after a first acute myocardial infarction Heart 2001, 86:376-380 35 Kleiger RE, Stein PK, Bosner MS, Rottman JN: Time domain measurements of heart rate variability ... modulation of heart rate Hypertension 1993, 21: 236-247 Guzzetti S, Mezzetti S, Magatelli R, Porta A, De Angelis G, Rovelli G, Malliani A: Linear and non-linear 24 h heart rate variability in chronic heart ... employing spectral analysis of heart rate variability J Hypertens 1988, 6:711-717 Mussalo H, Vanninen E, Ikaheimo R, Laitinen T, Laakso M, Lansimies E, Hartikainen J: Heart rate variability and its determinants...
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Age- and sex-related effects on the neuroanatomy of healthy elderly pdf
... exhibited the same rate of fractional volume decrease (0.11% per year) The GM and WM fraction losses were compensated by a rate of CSF fraction increase of 0.23% per year for men and of 0.32% per year ... increase of the GM and WM rate of atrophy as compared to the rates they estimated in their previous cross-sectional analysis, showing that when a larger period of time (3 to years) separates two ... the global GM rate of atrophy We believe this lack of significance to be the consequence of higher residual standard errors of the regression slope estimated in this region (about twofold the average...
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Báo cáo y học: " Post traumatic stress symptoms and heart rate variability in Bihar flood survivors following yoga: a randomized controlled study" ppsx
... survivors [8] and had seven years of experience in using a polygraph to record heart rate variability and respiration (i) Autonomic and respiratory variables Heart rate variability was assessed using ... Psychol 1984, 40:5-14 Task Force of the European Society of Cardiology and the North American Society of Pacing and Electrophysiology: Heart rate variability standards of measurement, physiological ... group showed an increase in self-rated anxiety Neither group showed changes in heart rate variability or in breath rate Previously a one week yoga program reduced selfrated fear, anxiety, sadness...
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Báo cáo y học: "Effects of p-Synephrine alone and in Combination with Selected Bioflavonoids on Resting Metabolism, Blood Pressure, Heart Rate and Self-Reported Mood Changes"
... absence of thermogenic changes in the placebo group, the absence of adverse effects on blood pressure, heart- rate and self-reports in the four treatment groups, the consistency of the effects of p-synephrine ... 600 mg of naringin and 100 mg of hesperidin No increase in heart rate or blood pressure was observed over the 75 of the study nor were there any differences in a self-reported rating of 10 common ... the effects of 50 mg p-synephrine (as Advantra Z®) alone with three different amounts of hesperidin and naringin on: (1) resting metabolism rate, (2) blood pressure, (3) resting heart- rate, and...
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Báo cáo y học: "Effect of Acute Administration of an Herbal Preparation on Blood Pressure and Heart Rate in Humans"
... No significant effects of either treatment on heart rate were noted over the first three hours after ingestion of the products However, a significant increase in heart rate over control was noted ... of a single dose of bitter orange extract in healthy subjects Pharmacotherapy 2005; 25: 1719-1724 Bui LT, Nguyen DT, Ambrose PJ Blood pressure and heart rate effects following a single dose of ... maximal blood levels of the ingredients [11, 13] Expired air was then collected and analyzed during the next 10 of the session Heart rate and blood pressure were recorded at the end of expired air...
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Tài liệu Determinants of Healthy Eating in Community-dwelling Elderly People pdf
... were discussed and put into context at the discretion of the authors Determinants of healthy eating in older people Individual Determinants of Healthy Eating Individual components motivating dietary ... intake in seniors tends to be moderate,73 and light to moderate drinking is associated with a better nutrient profile in older people.47,73 Collective Determinants of Healthy Eating Food choice in ... evaluation of the effectiveness of provision and marketing of appropriate, affordable nutrient-dense foods and upgrading the food market and transportaCANADIAN JOURNAL OF PUBLIC HEALTH S29 HEALTHY...
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Tài liệu Báo cáo khoa học: Mutational analysis of plasminogen activator inhibitor-1 Interactions of a-helix F and its neighbouring structural elements regulates the activity and the rate of latency transition pdf
... increased the rate of latency transition more than twofold Three variants, I137A, V142A, and N152A, had a biphasic loss of activity, one component with a significantly faster latency transition rate and ... determinants of serpin stability located in and around hF and support the presence of a novel serpin conformation that, due to rearrangements in the top of hF, has a considerably delayed rate of RCL ... Engineering of plasminogen activator inhibitor-1 to reduce the rate of latency transition Nat Struct Biol 2, 442–445 12 Sui, G.C & Wiman, B (1998) Stability of plasminogen activator inhibitor-1: role of...
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Báo cáo hóa học: " Dual-task costs while walking increase in old age for some, but not for other tasks: an experimental study of healthy young and elderly persons" pdf
... order of pairs was used for each task repetition Subjects were instructed to scan the paper from top to bottom, column by column, and to check off the grey box of the first pair, the while box of ... box of the third, the white box on the fourth, etc We quantified their performance as the number of boxes checked correctly within 20 s of quiet stance (single-task condition), or during Page of ... (last column of Tab 1) The latter outcome reflects the lack of a significant Age*Condition interaction in the above ANOVAs Subjects' performance in Exp B is illustrated in the right part of Fig Again,...
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báo cáo hóa học: " Influence of passive leg movements on blood circulation on the tilt table in healthy adults" pdf
... orthostatic hypotension (decrease of blood pressure and increase of heart rate) , hypoadrenergic orthostatic hypotension (decrease of blood pressure without an increase of heart rate) and postural tachycardia ... increase of heart rate was larger in the group tested on the traditional tilt table A correlation between heart rate and appearance of syncope was described [16,36] An increase in heart rate > ... sensitivity of 90% and a specification of 100% Consequently, the positive effect of passive leg movement on heart rate is obvious Heart rate and blood pressure give an indication of the sympathetic...
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báo cáo hóa học: " Evaluation of adaptation to visually induced motion sickness based on the maximum cross-correlation between pulse transmission time and heart rate" docx
... The resolution of A/D converter and the sampling rate are 12 bit and kHz, respectively Analysis Heart rate (HR) was calculated from the reciprocal of the inter-R-wave interval of the ECG signal ... continuous estimation of ρmax Methods Experiments Figure shows a schematic illustration of the experiment A total of 21 healthy subjects participated in the study Due to the number of devices available ... course Figure of the mean ρ group on Day1 and Day3 max changes of TS-down and TS-up the course of the mean ρmax changes of TS-down and TS-up group on Day1 and Day3 *p < 0.05 Page of (page number...
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Báo cáo hóa học: "Assessment of skeletal muscle fatigue of road maintenance workers based on heart rate monitoring and myotonometry" docx
... http://www.occup-med.com/content/1/1/20 Table 3: Workers' heart rate (HR), Pearson's correlation (r), Cohen's Kappa (k), percentage of the heart rate range (%HRR), energy expenditure (E), the rate of perceived exertion (RPE, ... is the mass of the testing end of myometer; amax is the maximal amplitude of oscillation, and ∆l is the depth of the displacement of the testing end Measurements for determination of muscle tone ... should be taken immediately The rating of perceived exertion (RPE) of individuals depending on their age, physical conditions, subjective view of increased heart rate and muscle fatigue was also assessed...
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Báo cáo hóa học: " Research Article Diurnal Changes of Heart Rate and Sympathovagal Activity for Temporal Patterns of Transient Ischemic Episodes in 24-Hour Electrocardiograms" pptx
... Advances in Signal Processing Morning 125 100 Heart rate (bpm) Heart rate (bpm) 125 75 50 B6−3 B3−0 I0−3 100 75 50 I B6−3 (a) 125 Heart rate (bpm) Heart rate (bpm) I0−3 I (b) P < 005 (t, I0−3 , Sa, ... shows aggregate average heart rates for all sets during the intervals of records The lowest heart rate is exhibited for the salvo-episode set Generally, the highest heart rate for each set is during ... N Bairey Merz, and D S Krantz, “Changes in heart rate and heart rate variability before ambulatory ischemic events,” Journal of the American College of Cardiology, vol 38, no 3, pp 742–749, 2001...
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Báo cáo lâm nghiệp: "Variability of spruce (Picea abies [L.] Karst.) compression strength with present reaction wood" pdf
... compression strength of fresh spruce is (44%) higher than that of normal wood The objectives of this paper are to find out the limits of compression strength parallel to grain of spruce wood with ... and the directions of measurements were marked on them Then, blocks A21 B21C21 E21 D21 F21 30 30 Fig A diagram of the production of a sample out of the log and the dimensions of the sample (CW ... side zones) of wood were sawn out of the logs for individual zones (a block of CW – compression wood zone, CW/CW – a sample containing 25% of compression wood at minimum, a block of OW – opposite...
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