Results 111 to 120 of about 1,713,582 (410)
Mental Workload Alters Heart Rate Variability, Lowering Non-linear Dynamics
Frontiers in Physiology, 2019 Mental workload is known to alter cardiovascular function leading to increased cardiovascular risk. Nevertheless, there is no clear autonomic nervous system unbalance to be quantified during mental stress.
S. Delliaux +3 more
semanticscholar +1 more source
Heart Rate Variability as an Index of Resilience.
Military Medicine, 2020 INTRODUCTION Resilience is the ability to maintain or quickly return to a stable physical and psychological equilibrium despite experiencing stressful events.
Capt Eric An +5 more
semanticscholar +1 more source
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Purpose/objectives Recent technological advancements have increased efficiency for clinical deliverability of online‐adaptive‐radiotherapy (oART). Previous cone‐beam‐computed‐tomography (CBCT) generations lacked the ability to provide reliable Hounsfield‐units (HU), thus requiring oART workflows to rely on synthetic‐CT (sCT) images derived ...
Jingwei Duan +7 more
wiley +1 more source
Heart rate recovery after exercise: relations to heart rate variability and complexity
Brazilian Journal of Medical and Biological Research, 2002 Physical exercise is associated with parasympathetic withdrawal and increased sympathetic activity resulting in heart rate increase. The rate of post-exercise cardiodeceleration is used as an index of cardiac vagal reactivation.
M. Javorka +3 more
doaj +1 more source
Discrete Scale Invariance in the Cascade Heart Rate Variability Of Healthy Humans [PDF]
arXiv, 2004 Evidence of discrete scale invariance (DSI) in daytime healthy heart rate variability (HRV) is presented based on the log-periodic power law scaling of the heart beat interval increment. Our analysis suggests multiple DSI groups and a dynamic cascading process. A cascade model is presented to simulate such a property.
arxiv
Short-term Heart Rate Turbulence Analysis Versus Variability and Baroreceptor Sensitivity in Patients With Dilated Cardiomyopathy [PDF]
, 2004 New methods for the analysis of arrhythmias and their hemodynamic consequences have been applied in risk stratification, in particular to patients after myocardial infarction.
Bauernschmitt, Robert +4 more
core +1 more source
Heritability of Ambulatory Heart Rate Variability. [PDF]
, 2004 Background - Reduced heart rate variability (HRV) is a prognostic factor for cardiac disease and cardiac mortality. Understanding the sources of individual differences in HRV may increase its diagnostic use and provide new angles for preventive therapy ...
Berg, M. van den +6 more
core +1 more source
Spectral Analysis of Heart Rate Variability: Time Window Matters
Frontiers in Neurology, 2019 Spectral analysis of heart rate variability (HRV) is a valuable tool for the assessment of cardiovascular autonomic function. Fast Fourier transform and autoregressive based spectral analysis are two most commonly used approaches for HRV analysis, while ...
Kai Li, Heinz Rüdiger, T. Ziemssen
semanticscholar +1 more source
Heart rate variability in isolated rabbit heart
Journal of the American College of Cardiology, 1996 The presence of heart rate variability (HRV) in patients with cardiac denervation after heart transplantation raised our interest in HRV of isolated, denervated hearts. Hearts from seven adult white ELCO rabbits were transferred to a perfusion apparatus. All hearts were perfused in the working mode and in the Langendorff mode for 20 minutes each.
Christian Mayer +5 more
openaire +4 more sources
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Background To assess the dose‐sparing capabilities of a yaw‐limited volumetric modulated arc therapy (YL_VMAT) beam setup for adjacent organs at risk (OAR) in comparison with 3D‐conventional radiation therapy (3D‐CRT), intensity‐modulated radiation therapy (IMRT) and conventional VMAT for radiation therapy in left‐sided breast cancer patients.
Gerhard Pollul +4 more
wiley +1 more source