Wszystkie pola: Heart rate - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Zmiany częstości tętna u uczniów klas I i V w czasie lekcji
Changes of heart rate in children in 1st and 5th classes of elementary schools during lessons
Autorzy:: Zdunkiewicz, L.
Gorynski, P.
Polus-Szeniawska, E.
Powiązania:: https://bibliotekanauki.pl/articles/871454.pdf
Data publikacji:: 1976
Wydawca:: Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:: szkoly podstawowe
uczniowie
zajecia lekcyjne
nauka
praca
praca umyslowa
obciazenie praca
uklad krazenia
tetno
serce
skurcze serca
czestosc skurczow serca
Źródło:: Roczniki Państwowego Zakładu Higieny; 1976, 27, 4
0035-7715
Pojawia się w:: Roczniki Państwowego Zakładu Higieny
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Nonlinear methods in heart rate variability
Autorzy:: Barczyński, Ryszard J.
Kubasik, Andrzej
Powiązania:: https://bibliotekanauki.pl/articles/1953450.pdf
Data publikacji:: 1997
Wydawca:: Politechnika Gdańska
Opis:: In recent years, analysis of heart rate variability (HRV) has become a common tool for prediction of cardiac mortality. The universal rule is that a reduced variability is a signature for enhanced risk. However, the clinical value of the usual methods (the calculation of averages, standard deviations and variances of RR interval subsets, analysis of the power spectra in frequency domain) is very limited: false positive results cut the positive predictive value down to about 30%. We applied a net information flow method of determination of complexity in deterministic chaos (associated with nonlinear dynamics) to 24 hour recordings of beat-to-beat heart-rate. It is likely that analysis of HRV by the means of nonlinear dynamics may open a way for a new classification of HRV.
Źródło:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 1997, 1, 2; 195-207
1428-6394
Pojawia się w:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The Effects of Local Cooling on Thermophysiological Response in Participants Wearing Dust-Free Garments
Autorzy:: Kwon, O. K.
Kwon, A. H.
Kato, M.
Hayashi, C.
Tokura, H.
Powiązania:: https://bibliotekanauki.pl/articles/90860.pdf
Data publikacji:: 1998
Wydawca:: Centralny Instytut Ochrony Pracy
Tematy:: dust-free garment
frozen gel strip
skin temperature
heart rate
clothing microclimate
odzież bezpyłowa
temperatura ciała
obciążenie cieplne
Opis:: This study was designed to find the effects of two kinds of dust-free garments with (A) and without (B) frozen gel strip (FGS), and half-naked clothing (brassiere and shorts; C) on thermophysiological parameters and on temperature and humidity within clothing. The heart rate, rectal, and skin temperatures as well as sweat rate and clothing microclimate were measured during 140 min in 9 healthy females. Inquiries were also made into the subjective rating of thermal, humidity, and comfort sensations. The main findings in our experiments are as follows: (a) Physiological parameters such as rectal and skin temperatures (chest and forehead), heart rate, and sweat rate were clearly lowest in garb C, intermediate in garb A, and highest in garb B throughout the experiment; (b) Temperature and humidity within clothing were lower in garb A than in garb B; (c) More than half of the 9 participants decreased thermal sensation by wearing garb A. These results suggest that the usage of FGS could improve the heat load in lightly working participants wearing dust-free garments.
Źródło:: International Journal of Occupational Safety and Ergonomics; 1998, 4, 1; 57-67
1080-3548
Pojawia się w:: International Journal of Occupational Safety and Ergonomics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Heart Rate Variability in Exposure to High Altitude Hypoxia of Short Duration
Autorzy:: Zużewicz, K.
Biernat, B.
Kempa, G.
Kwarecki, K.
Powiązania:: https://bibliotekanauki.pl/articles/91083.pdf
Data publikacji:: 1999
Wydawca:: Centralny Instytut Ochrony Pracy
Tematy:: heart rate variability
hypoxic hypoxia
autonomic nervous system
zmienność rytmu serca
układ nerwowy
niedotlenienie
Opis:: The objective of the study is to attempt an evaluation of heart rate (HR) and heart rate variability (HRV) regulatory mechanisms in the presence of autonomous nervous system (ANS) components in transient exposure to high altitude hypoxia. During 24 hrs including a stay in hypobaria, the participants had their HR continuously recorded using the Holter method. The following parameters were calculated at rest and during the stay in a thermobarochamber: spectral power in low frequency bands (LF) 0.04-0.15 Hz and high frequency bands (HF) 0.15-0.5 Hz, and the sympathetic-parasympathetic balance index LF/HF. Under hypobaric conditions, a decrease in mean spectral power of R-R intervals was noted within both frequency ranges, compared with the study performed in normobaria. The observed differences were larger at daytime.
Źródło:: International Journal of Occupational Safety and Ergonomics; 1999, 5, 3; 337-346
1080-3548
Pojawia się w:: International Journal of Occupational Safety and Ergonomics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Cardiovascular, metabolic and plasma catecholamine responses to passive and active exercises
Autorzy:: Krzeminski, K.
Kruk, B.
Nazar, K.
Ziemba, A.W.
Cybulski, G.
Niewiadomski, W.
Powiązania:: https://bibliotekanauki.pl/articles/70316.pdf
Data publikacji:: 2000
Wydawca:: Polskie Towarzystwo Fizjologiczne
Tematy:: cardiovascular response
plasma adrenaline
heart rate
noradrenaline
stroke volume
plasma catecholamine
systolic time interval
passive exercise
metabolic response
blood pressure
active exercise
blood lactate
Źródło:: Journal of Physiology and Pharmacology; 2000, 51, 2
0867-5910
Pojawia się w:: Journal of Physiology and Pharmacology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Circadian Rhythm of Heart Rate, Urinary Cortisol Excretion, and Sleep in Civil Air Traffic Controllers
Autorzy:: Zużewicz, K.
Kwarecki, K.
Waterhouse, J.
Powiązania:: https://bibliotekanauki.pl/articles/90437.pdf
Data publikacji:: 2000
Wydawca:: Centralny Instytut Ochrony Pracy
Tematy:: heart rate
cortisol
sleep disorders
circadian rhythm
shift work
tętno
zaburzenia snu
praca zmianowa
Opis:: The examination of Air Traffic Controllers (ATCs) from the Warsaw Airport (Poland) included 24-hr ECG monitoring. The participants were 10 civil ATCs, 9 males and 1 woman. The study was carried out on a group of 19 ATCs during their duty periods, 14 of them working 12-hr shifts and 5 performing 24-hr duties. The participants collected urine every 4 hrs, and cortisol concentration was determined. Further, the survey included the quality and duration of sleep, and subjective fatigue in the 62 participants. In ATCs, shift work modifies natural rhythms of the circulatory system and decreases the ability for intensified mental work at night. In consequence ATCs experience frequent sleep disorders.
Źródło:: International Journal of Occupational Safety and Ergonomics; 2000, 6, 3; 383-392
1080-3548
Pojawia się w:: International Journal of Occupational Safety and Ergonomics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: A Heart Rate Evaluation Approach to Determine Cost-Effectiveness an Ergonomics Intervention
Autorzy:: Bedny, G. Z.
Karwowski, W.
Seglin, M. H.
Powiązania:: https://bibliotekanauki.pl/articles/90952.pdf
Data publikacji:: 2001
Wydawca:: Centralny Instytut Ochrony Pracy
Tematy:: fatigue
break time allowances
heart rate evaluations
energy expenditure
wydatek energetyczny
serce
zmęczenie
czas pracy
rozkład czasu odpoczynku
warunki pracy
Opis:: This paper describes a hear-rate methodology to determine the cost-effectiveness of an ergonomics intervention to reduce workload and improve working conditions. This is a practical approach as opposed to the energy expenditure technique that is difficult to implement in natural settings. This was a laboratory study using a large excavator cabin with devices to simulate excavation operations. Mean heart rate was used to calculate the required rest time during a shift with or without air-conditioning. The criterion for evaluation was differences in required rest time during a shift under these 2 conditions. The simplicity and objectivity of this approach invites use to solve the problem of the economic evaluation of ergonomics interventions.
Źródło:: International Journal of Occupational Safety and Ergonomics; 2001, 7, 2; 121-133
1080-3548
Pojawia się w:: International Journal of Occupational Safety and Ergonomics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: A Prescriptive Exercise Program for Health Maintenance
Autorzy:: Yamashita, A.
Kawakami, M.
Inagaki, Y.
Ohkubo, T.
Powiązania:: https://bibliotekanauki.pl/articles/89896.pdf
Data publikacji:: 2001
Wydawca:: Centralny Instytut Ochrony Pracy
Tematy:: health maintenance
prescriptive exercise program
aging society
heart rate
relative metabolic rate
myoelectric potential
starsi pracownicy
fizjologia
praca mięśni
wydolność
zdolność fizyczna
metabolizm
Opis:: The aim of this study was to design a prescriptive exercise program for people of various age and fitness basing on the popular in Japan Radio Physical Fitness Exercise, a program based on an experimental approach. The evaluation indices used in the experiment were heart rate (HR), oxygen consumption, and electrical activity of the rectus femoris, latissimus dorsi, and trapezius muscles, which measured during various motion elements of the program performed at various rate. The results of this study enable to calculate equations for predicting HR during exercise from relative metabolic rate (RMR). The data on HR, RMR, and myoelectric potential presented in this study may be a basis for designing individual exercise programs for elderly people.
Źródło:: International Journal of Occupational Safety and Ergonomics; 2001, 7, 2; 195-209
1080-3548
Pojawia się w:: International Journal of Occupational Safety and Ergonomics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Validation of Methods for Determination of Metabolic Rate in the Edholm Scale and ISO 8996
Autorzy:: Giedraityte, L.
Holmer, I.
Gavhed, D.
Powiązania:: https://bibliotekanauki.pl/articles/91003.pdf
Data publikacji:: 2001
Wydawca:: Centralny Instytut Ochrony Pracy
Tematy:: energy expenditure
heat production
light and moderate work
manual tasks
heart rate
wydatek energetyczny
fizjologia układu moczowo-płciowego
warunki pracy
metabolizm
Opis:: The aim of this study was to validate the Edholm scale (Edholm, 1966) and the ISO 8996 standard (International Organization for Standardization [ISO], 1990) by comparing the metabolic rates estimated for both methods with the actual measured metabolic rate (MMeas) in 6 manual material handling tasks simulated under laboratory conditions. The metabolic rate was calculated from oxygen consumption V˙ O2 (19 participants) according to Standard No. ISO 8996 (ISO, 1990). Additionally, the participants estimated perceived exertion using the Borg scale. The metabolic rates derived from the Edholm scale (MEdh) overestimated 5 of 6 activities by 34–50% (< =.05). The metabolic rates derived from ISO 8996 (MISO) overestimated all activities by 7–38% (< =.05).
Źródło:: International Journal of Occupational Safety and Ergonomics; 2001, 7, 2; 135-148
1080-3548
Pojawia się w:: International Journal of Occupational Safety and Ergonomics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Coincidence of maternal and fetal QRS complexes in view of fetal heart rate determination
Autorzy:: Kupka, T.
Jeżewski, J.
Matonia, A.
Wróbel, J.
Horoba, K.
Powiązania:: https://bibliotekanauki.pl/articles/333792.pdf
Data publikacji:: 2002
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: brzuszne EKG płodu
monitorowanie płodu
tętno płodu
abdominal fetal electrocardiogram
fetal monitoring
fetal heart rate
Opis:: Indirect fetal electrocardiography is a developing diagnostic method in perinatal medicine. Signals of electrical activity being recorded from maternal abdomen surface contain more information than in till now used method of mechanical heart activity measurement based on ultrasound signals. The main problem relies on separation of basic useful component from a signal containing also dominant maternal electrocardiogram and muscles activity artifacts. The algorithms of maternal electrocardiogram suppression via subtraction are commonly used. Although regarding their complexity, these algorithms have limited applicability in systems for long-term monitoring of fetal heart activity. Other solution relies on simple blanking of maternal QRS complexes. However, in case of coincidence of fetal and maternal QRS complexes, this leads to partial loss of information about fetal heart rate variability. For evaluation of how often such coincidence of both complexes takes place, the algorithm has been developed which is described in this paper.
Źródło:: Journal of Medical Informatics & Technologies; 2002, 4; MT49-55
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Computerized fetal monitoring based on bioelectric signals from maternal abdomen
Autorzy:: Matonia, A.
Jeżewski, J.
Gacek, A.
Kupka, T.
Horoba, K.
Wróbel, J.
Powiązania:: https://bibliotekanauki.pl/articles/333805.pdf
Data publikacji:: 2002
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: monitorowanie płodu
elektrokardiografia
tętno płodu
fetal monitoring
fetal abdominal
electrocardiography
fetal heart rate
Opis:: The paper presents an instrumentation set for effective diagnostics of early symptoms of fetal distress in high-risk pregnancy based on bioelectric signals recording. The representative database of records has been established that enabled the complex analysis of signals recorded on a surface of maternal abdomen. As an outcome, the effective algorithms have been developed for processing both the fetal electrocardiogram and the signal of electrical activity of a uterine muscle. This allowed the development of unique diagnostic system based on external biosignal measurement module connected to the standard personal computer. In this system, like in a classical fetal monitor, the fetal heart rate (FHR) signal together with contraction activity signal of uterine muscle and fetal movement become an essential source of information on fetal condition. In addition, there is a possibility for spectral analysis of FHR signal as well as a morphology assessment of fetal ECG signal.
Źródło:: Journal of Medical Informatics & Technologies; 2002, 4; MT37-47
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Inconsistency in evaluation of clinical patterns in fetal heart rate waveforms
Autorzy:: Jeżewski, J.
Horoba, K.
Wróbel, J.
Gacek, A.
Powiązania:: https://bibliotekanauki.pl/articles/333801.pdf
Data publikacji:: 2002
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: monitorowanie płodu
tętno płodu
przyspieszanie / zwalnianie
fetal monitoring
fetal heart rate
acceleration/deceleration
expert inconsistency
Opis:: Acceleration and deceleration patterns in fetal heart rate (FHR) are widely used as an assessment of fetal condition. The basis for both visual and automated quantitative analysis is correctly determined fetal heart rate baseline. There are many methods for automated fetal heart rate baseline estimation. Since there are no definitive criteria or "gold standard" to evaluate algorithms for baseline determination, a clinical expert could be considered as a reference. Taking into account that not the shape of baseline itself but the results of quantitative analysis obtained using this baseline are important, we stated that such evaluation should be done only on the basis of comparison of effects - the recognized accelerations and decelerations. However, the first step for such comparison is to check how well expert meets established FIGO definition of accelerations and decelerations patterns in FHR trace. The paper presents a method for evaluation of expert's interpretation of these definitions. Two indices describing the inconsistency among fetal monitoring system and experts have been defined. The results obtained indicate the essential differences in procedure of accelerations/decelerations recognition by the computerized system and human expert.
Źródło:: Journal of Medical Informatics & Technologies; 2002, 4; MT27-35
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Combined analysis of fetal electrocardiogram and systolic time intervals
Autorzy:: Matonia, A.
Jeżewski, J.
Kupka, T.
Horoba, K.
Wróbel, J.
Widera, M.
Powiązania:: https://bibliotekanauki.pl/articles/334019.pdf
Data publikacji:: 2003
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: monitorowanie płodu
wybrany termin cyklu sercowego
EKG płodu
tętno płodu
fetal monitoring
cardiac cycle timing
fetal electrocardiography
fetal heart rate
Opis:: Cardiotocography as a simultaneous recording of fetal heart rate (FHR) and uterine contraction activity is a basic method of evaluation of fetal condition. Correct variability of the fetal heart rate is an indirect sign of adequate oxygenation of a fetus. Unfortunately, the reverse case is not always true, signs suggesting pathological changes can also appear in recording when the fetal is not at risk. The cardiotocography shall then be recognized as a more screening than diagnostic method. It will be interesting to develop a non-invasive method being complementary to routine cardiotocography. This method should allow the adequate prediction of a bad neonatal outcome when the test is abnormal. The paper shows the system that makes possible cardiotocograms analysis in parallel with the assessment of additional parameters determined from comparison of mechanical and electrical fetal heart activity signals. The studies are aimed at development of set of parameters that are high correlated with clinical outcome.
Źródło:: Journal of Medical Informatics & Technologies; 2003, 6; IT27-34
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Comparison Between the Strain Indicator HRV of a Head-Based Virtual Retinal Display and LC-Head Mounted Displays for Augmented Reality
Autorzy:: Oehme, O.
Schmidt, L.
Luczak, H.
Powiązania:: https://bibliotekanauki.pl/articles/90667.pdf
Data publikacji:: 2003
Wydawca:: Centralny Instytut Ochrony Pracy
Tematy:: virtual retinal display
heart rate variability
workload
strain
augmented reality
stres
komputer
obciążenie pracą umysłową
zagrożenia zdrowia
praca przy komputerze
Opis:: Augmented Reality uses Head Mounted Displays (HMD) to overlay the real word with additional virtual information. Virtual Retinal Displays (VRD), a new display technology, no longer requires Liquid Crystal Displays (LCD). VRD technology addresses the retina directly with a single laser stream of pixels. There are no studies on the user’s informational strain in this new VRD technology. Various papers have shown that Heart Rate Variability (HRV) is a valid indicator for the user’s informational strain. An empirical test revealed no difference in the user’s HRV between VRD technology and LCD technology. Consequently, there seems to be a comparable user informational strain regarding the display types.
Źródło:: International Journal of Occupational Safety and Ergonomics; 2003, 9, 4; 419-430
1080-3548
Pojawia się w:: International Journal of Occupational Safety and Ergonomics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Reliability and quality of ultrasound measurements of fetal heart rate variability
Autorzy:: Jeżewski, J.
Wróbel, J.
Kupka, T.
Matonia, A.
Horoba, K.
Widera, M.
Powiązania:: https://bibliotekanauki.pl/articles/334011.pdf
Data publikacji:: 2003
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: zmienność tętna płodu
USG metodą Dopplera
EKG płodu
fetal heart rate variability
Doppler ultrasound method
fetal electrocardiogram
Opis:: This work was aimed at assessment of usability of Doppler ultrasound method for the analysis of fetal heart rate variability at a level of single heart beats. The purpose of this study was to check if today fetal monitors provide the signal of accuracy comparable with an electrocardiography method. The virtual instrumentation software for measurement system and processing of acquired signals was implemented using LABVIEW environment. The results obtained reveal that accuracy of today monitors which use Doppler ultrasound technique is sufficient for visual analysis of the FHR traces. However, for the computerized analysis at a beat-to-beat level, this accuracy is below the acceptable value.
Źródło:: Journal of Medical Informatics & Technologies; 2003, 6; IT21-26
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

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