Search results for "HEART"
showing 10 items of 3201 documents
Pink Floyd et la tentation symphonique : l'expérience Atom Heart Mother
2012
International audience
Longitudinal and cross-sectional associations of adherence to 24-hour movement guidelines with cardiometabolic risk
2022
This study aimed to examine 1) adherence to 24-hour movement guidelines over a 2-year follow-up in children aged 6-8 years and 2) association of this adherence with cardiometabolic risk factors. Physical activity and sleep were assessed by a monitor combining heart rate and accelerometry measurements. Screen time was reported by the parents. Body fat percentage, waist circumference, blood glucose, serum insulin, plasma lipids and blood pressure were assessed, and a cardiometabolic risk score was calculated using z-scores. Children were classified as meeting the guidelines if they had on average ≥60min/day of moderate-to-vigorous physical activity during the valid days; ≤120min/day of screen…
Intravenous iron therapy in patients with heart failure. A double-edged sword
2013
We read with interest the article of Beck-da-Silva et al., who recently concluded that intravenous (IV) iron seems to be superior over oral supplementation for improving functional capacity of heart failure patients [1]. Irrespective of the study design, involving comparison of functional outcomes between two different means of iron supplementation, we raise some clinical issues about the rationale underlying this investigation. According to the data published by Beck-da-Silva et al., the modest number of patients (n = 23) enrolled in this multicenter investigation had moderate anemia (i.e., hemoglobin concentration comprised between 90 and 120 g/L) but no evidence of iron deficiency, which…
The effects of heart rate variability and cardiac cycle time on learning in trace eye-blink conditioning
2017
Ärsykkeen sydämen sykkeeseen ajastamisella on huomattu olevan yhteyttä sensoriseen havainnointiin ja korkeampaan kognitiiviseen prosessointiin, kun sykevälivaihtelu (HRV)puolestaan on yhdistetty tarkkaavaisuuteen. Tässä tutkimuksessa tarkasteltiin sykevälivaihtelun sekä ärsykkeen sydämen sykkeeseen ajastamisen yhteyksiä oppimiseen. Koehenkilöt osallistuivat silmäniskuehdollistumiskokeeseen, missä ärsykkeet oli ajastettu joko sydämen sykkeen systoliseen tai diastoliseen vaiheeseen. HRV:n ja EEG:n mittaaminen aloitettiin viisi minuuttia ennen kokeen alkua ja sitä jatkettiin viisi minuuttia kokeen loppumisen jälkeen. Tutkimuksessa tarkasteltiin kuutta HRV-muuttujaa: sykevälin keskiarvo (MRR), …
3D Printing and Computational Modeling for the Evaluation of LVOT obstruction in Transcatheter Mitral Valve Replacement
2022
Transcatheter mitral valve replacement (TMVR) is an emerging alternative treatment for those patients not qualified for surgery. However, TMVR can determine an obstruction of the left ventricular outflow tract (namely, neo-LVOT) induced by the transcatheter heart valve (THV) displacing the native mitral valve leaflet towards the myocardial wall. This condition can lead to haemodynamic impairment and ultimately patient death. We sought to predict the neo-LVOT obstruction by first developing patient-specific simulations of the THV deployment and then comparing predictions with post-TMVR diagnostic images and 3D printed human models. Using pre-TMVR computed-tomography (CT) imaging, patient-spe…
Using Heart Rate Variability Methods for Health-Related Outcomes in Outdoor Contexts : A Scoping Review of Empirical Studies
2023
Heart rate variability (HRV) is a psychophysiological variable that is often used in applied analysis techniques to indicate health status because it provides a window into the intrinsic regulation of the autonomic nervous system. However, HRV data analysis methods are varied and complex, which has led to different approaches to data collection, analysis, and interpretation of results. Our scoping review aimed to explore the diverse use of HRV methods in studies designed to assess health outcomes in outdoor free-living contexts. Four database indexes were searched, which resulted in the identification of 17,505 candidate studies. There were 34 studies and eight systematic reviews that met t…
Rakkaudesta lajiin ja paskaan läppään : Icehearts-urheilujoukkue ja poikien sosiaalinen pääoma
2016
Jonne Silonsaari (2016). Rakkaudesta lajiin ja paskaan läppään. Icehearts-urheilujoukkue ja poikien sosiaalinen pääoma. Liikuntakasvatuksen laitos, Jyväskylän yliopisto, liikunnan yhteiskuntatieteiden pro-gradu -tutkielma, 119 s., 2 liitettä. Tämä liikunnan yhteiskuntatieteiden opinnäyte käsittelee Icehearts-joukkuetta poikien erityisen tuen mallina. Icehearts on innovatiivinen nuoriso- ja sosiaalityön toimintamalli, joka perustuu joukkueurheiluharrastukselle ja pitkäaikaiselle kasvattajasuhteelle. Tutkimus keskittyy toimintamallin vaikuttavuuden ja yhteiskunnallisten hyötyjen sijaan tarkastelemaan joukkueen sosiaalisia käytäntöjä ja prosesseja. Niitä kuvataan kiinnittymisenä kasvattajaan, …
Assessing Transfer Entropy in cardiovascular and respiratory time series: A VARFI approach
2021
In the study of complex biomedical systems represented by multivariate stochastic processes, such as the cardiovascular and respiratory systems, an issue of great relevance is the description of the system dynamics spanning multiple temporal scales. Recently, the quantification of multiscale complexity based on linear parametric models, incorporating autoregressive coefficients and fractional integration, encompassing short term dynamics and long-range correlations, was extended to multivariate time series. Within this Vector AutoRegressive Fractionally Integrated (VARFI) framework formalized for Gaussian processes, in this work we propose to estimate the Transfer Entropy, or equivalently G…
Porównanie stopnia uszkodzenia mięśnia sercowego po zastosowaniu kardioplegii krwistej i krystaloidowej u pacjentów poddanych zabiegowi izolowanej wy…
2016
Wstęp: Kardioplegina jest środkiem używanym do tymczasowego zatrzymywania czynności elektromechanicznej serca w zabiegach kardiochirurgicznych. Jest to roztwór o wysokiej zawartości jonów potasu podawany do tętnic wieńcowych w postaci zmieszanej z krwią pacjenta z oksygenatora (kardioplegina krwista) lub w postaci roztworu krystaloidowego (kardioplegina krystaloidowa). W dotychczasowych badaniach w większości wykazano wyższość kardiopleginy krwistej nad krystaliczną w operacjach pomostowania aortalno-wieńcowego (CABG). Celem niniejszego badania było sprawdzenie, czy u pacjentów poddanych izolowanemu zabiegowi wymiany zastawki aortalnej (AVR), podobnie jak w przypadku pacjentów poddanych CAB…
Impact of using different levels of threshold-based artefact correction on the quantification of heart rate variability in three independent human co…
2020
Heart rate variability (HRV) is a non-invasive indicator of autonomic nervous system function. HRV recordings show artefacts due to technical and/or biological issues. The Kubios software is one of the most used software to process HRV recordings, offering different levels of threshold-based artefact correction (i.e., Kubios filters). The aim of the study was to analyze the impact of different Kubios filters on the quantification of HRV derived parameters from short-term recordings in three independent human cohorts. A total of 312 participants were included: 107 children with overweight/obesity (10.0 ±