analysis of heart rate variability

... 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 ... “Time-frequency analysis of heart rate variability signals in patients with autonomic dysfunction,” in Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis, ... 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...

Ngày tải lên: 22/06/2014, 20:20

... infection with heart rate variability analysis Several studies have examined the usefulness of HRV analysis for early diagnosis of infection, particularly in neonates and infants The majority of work ... warranted to realize the full potential of HRV analysis for the early diagnosis of infection Prognostication of infection with heart rate variability analysis Determining prognosis, namely mortality ... 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...

Ngày tải lên: 13/08/2014, 19:20

... 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, ... 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 ... Spectral analysis of the heart rate variability in sleep Physiol Res 2005, 54(4):369-376 in printing Graybiel A, Wood CD, Miller EF, Cramer DB: Diagnostic criteria for grading the severity of acute...

Ngày tải lên: 19/06/2014, 10:20

... spectral 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 ... Brusca A, Malliani A Heart rate variability in the early hours of an acute myocardial infarction Am J Cardiol 1996; 77(12): 1037-44 216 Lombardi F Spectral analysis of heart rate variability Card ... 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...

Ngày tải lên: 15/09/2015, 17:10

... 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 ... -2.9 2613.5 76.4 1.1 5547.8 SD of difference 189 Comparison of novel versus commercial HRV softwares Table 11-3: Bland-Altman analysis (mean percent difference) of time- and frequency-domain variables...

Ngày tải lên: 15/09/2015, 17:11

... 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 ... 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 ... 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...

Ngày tải lên: 15/09/2015, 17:11

... mean foetal heart rate, mean RR interval, SDNN, rMSSD and pNN27 Mean heart rate is the mean foetal heart rate measured in beats per minute The mean RR interval is the average duration of all the ... 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) ... 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...

Ngày tải lên: 15/09/2015, 17:11

... 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…………………………………………...

Ngày tải lên: 15/09/2015, 17:11

... 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...

Ngày tải lên: 22/06/2014, 20:20

... evresbo ot tuo deirrac saw ypocsoroulf yar-X ]3[ S + L = SHV :alumrof gniwollof eht gnisu detaluclac saw SHV ehT arbetrev cicaroht htruof eht fo egde lainarc eht htiw gninnigeb ,arbetrev fo rebmun ... SF% ,001 × emulov cilotsaid -dne/)emulov cilotsys-dne − emulov cilotsaid-dnE( = FE :salumrof gniwollof eht ot gnidrocca yhpargoidracohce edom-M yb )SF%( gninetrohs lanoitcarf dna )FE( noitcarf ... laudividni hcae rof semit evif derusaem saw erusserp doolB )1 elbaT( sgiporcim eht ni gk 92.1 ± 01.23 dna sgip lanoitnevnoc eht ni gk 54.0 ± 05.03 saw thgiew ydob naem ehT sgiporcim eht rof syad 063...

Ngày tải lên: 07/08/2014, 20:23

... 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 ... sampling rate of 1024 Hz and were analyzed offline Noise free data were used for analysis The data were analyzed using software developed by the Biomedical Signal Analysis Group, University of Kuopio, ... 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...

Ngày tải lên: 11/08/2014, 16:22

... for twinning rate; 5.9% and 9.1%, by the LM and TM analyses, respectively The twinning rate of calvings of daughters by Shafan was 10.8% (repeatability 95%), and the twinning rate of his granddaughters ... twinning rate of 112 daughters of the sire Shafan was 10.6% His evaluation for twinning rate was SD units above the mean in the LM analysis, but only SD units greater than the mean in the TM analysis ... twinning on the basis of high initial twinning rate of foundation dams and bulls (Morris, 1984) In a recent experiment, the first generation of daughters had a twinning frequency of 12.8% (Foulley...

Ngày tải lên: 14/08/2014, 20:20

... risk profile of mortgages Using OPMs, we can derive the market value of default, prepayment and the mortgage One may think of the value of an option as the product of the probability of exercising ... include endogenous response of supply credit to both the strategic timing of default or prepayment of borrower, and simultaneously to the characteristics of the collateral offered by the borrower, ... asymptotically Gaussian A detailed analysis of LSM is also carried recently by Stentoft (2003) The author, based on the analysis of various specifications of the cross-sectional regressions,...

Ngày tải lên: 15/09/2015, 22:51

... 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...

Ngày tải lên: 25/10/2012, 11:04

... analyses of the data were performed using x analysis of variance (ANOVA) For the first data analysis, treatment and time were the independent factors using all 23 subjects The second analysis separated ... 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 ... 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...

Ngày tải lên: 25/10/2012, 11:10

... 0.60 ± 0.35 s-1 The analysis of tissue velocities demonstrated a gradient of systolic (S´) and diastolic (early E´ and late A´) velocities from the apex to the basis of the heart with significant ... cut-off value 15 for strain of –6.5 % a sensitivity of 23 % and specificity of 87 % was calculated for the detection of infarcted segments (AUC 0.6, confidence interval 0.53 – 0.64) A 111 cut-off ... images the quality of VVI data is strictly dependent on the quality of the echocardiographic loops A problem of all Strain Rate Imaging algorithms is the huge variability of comparable parameters...

Ngày tải lên: 25/10/2012, 11:15

... intensive sun heating of the land surface, but the breeze has some cooling effect The combination of rain shortage and extreme heat makes much of Iraq a desert Because of very high rates of evaporation, ... Afaaj A.H Study of air pollution at Bayje city, environmental researches office, Iraqi Organization of Atomic Energy, Tech report, 2000 [18] Barnston A.G Time-Scales of variability of the atmosphere, ... Journal of Remote Sensing 2003, 24, 1361 – 1367 [7] Ogunjobi K.O Temporal and spatial patterns of Inter annual variability of total column ozone in Africa from ground – based observation Journal of...

Ngày tải lên: 05/09/2013, 15:28

... In that analysis, inhibitory active PAI-1 will migrate as a complex with uPA while PAI-1 exhibiting substrate behaviour will migrate slightly faster than native PAI-1 due to cleavage of the C-terminal ... 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...

Ngày tải lên: 20/02/2014, 11:20

... level of the rate shock An Analysis of Commercial Bank Exposure to Interest Rate Risk provide an estimate of the net change in the economic value of an institution’s assets, liabilities, and offbalance-sheet ... important part of the management of interest rate risk at certain banks The notional amount of interest rate contracts—such as interest rate options, swaps, futures, and forward rate agreements—has ... shortcoming of assuming that the rate of change in an instrument’s price is linear, whether for rate moves of or 500 basis points The second approach, analyzing present values for a specific rate scenario,...

Ngày tải lên: 06/03/2014, 02:21

... this paper are those of the authors and not necessarily reflect the position of the Federal Reserve Bank of New York or the Federal Reserve System An Analysis of OTC Interest Rate Derivatives Transactions: ... meaningful degree of customization in contract terms, particularly in payment frequencies and floating rate tenors Because of the unique and disparate characteristics of some of these transactions, ... floating rate coupon and the fixed rate coupon payments is exchanged Market participants often employ interest rate derivatives for one of two reasons, either (a) to hedge interest rate risk;...

Ngày tải lên: 06/03/2014, 03:20