Results 51 to 60 of about 16,166,191 (388)
Science Advances, 2019 We show that glymphatic influx into the brain occurs in direct proportion to slow cortical activity and inversely to heart rate. The glymphatic system is responsible for brain-wide delivery of nutrients and clearance of waste via influx of cerebrospinal ...
L. Hablitz +7 more
semanticscholar +1 more source
Physiological Measurement, 2020 Heart rate variability has been largely used for the assessment of cardiac autonomic activity, due to the direct relationship between cardiac rhythm and the activity of the sympathetic and parasympathetic nervous system.
E. Mejía-Mejía +3 more
semanticscholar +1 more source
A model of heart rate kinetics in response to exercise
, 2008 We present a mathematical model, in the form of two coupled ordinary differential equations, for the heart rate kinetics in response to exercise. Our heart rate model is an adaptation of the model of oxygen uptake kinetics of Stirling: a physiological ...
Refoyo Román, Ignacio +3 more
core +1 more source
Heart Rate Variability and Cognitive Function: A Systematic Review
Frontiers in Neuroscience, 2019 Background: Autonomic dysfunctions may precede the development of cognitive impairment, but the connection between these dimensions is unclear. This systematic review aims to analyze the relationship between heart rate variability (HRV) and cognitive ...
G. Forte, F. Favieri, M. Casagrande
semanticscholar +1 more source
Wearable radio-frequency sensing of respiratory rate, respiratory volume, and heart rate
npj Digital Medicine, 2020 Many health diagnostic systems demand noninvasive sensing of respiratory rate, respiratory volume, and heart rate with high user comfort. Previous methods often require multiple sensors, including skin-touch electrodes, tension belts, or nearby off-the ...
Pragya Sharma +4 more
semanticscholar +1 more source
Heart-rate pulse-shift detector [PDF]
, 1974 Detector circuit accurately separates and counts phase-shift pulses over wide range of basic pulse-rate frequency, and also provides reasonable representation of full repetitive EKG waveform.
Anderson, M.
core +1 more source
Interaction between Heart Rate and Heart Rate Variability [PDF]
Annals of Noninvasive Electrocardiology, 2014 Heart rate variability (HRV) is significantly associated with average heart rate (HR), therefore, HRV actually provides information on two quantities, that is, on HR and its variability. It is difficult to conclude which of these two plays a principal role in the HRV clinical value, or in other words, what is the HR contribution to the clinical ...
openaire +2 more sources
Pediatric Blood &Cancer, EarlyView.ABSTRACT Purpose Metabolic syndrome (MetS) is a common complication in survivors of childhood acute lymphoblastic and myeloid leukemia (AL), and a major risk factor for premature cardiovascular disease, type‐2‐diabetes, and metabolic dysfunction‐associated steatotic liver disease (MASLD).
Visentin Sandrine +10 more
wiley +1 more source
Lifestyle Behaviors and Cardiotoxic Treatment Risks in Adult Childhood Cancer Survivors
Pediatric Blood &Cancer, EarlyView.ABSTRACT Background Higher doses of anthracyclines and heart‐relevant radiotherapy increase cardiovascular disease (CVD) risk. This study assessed CVD and CVD risk factors among adult childhood cancer survivors (CCSs) across cardiotoxic treatment risk groups and examined associations between lifestyle behaviors and treatment risks.
Ruijie Li +6 more
wiley +1 more source
A Model for the Genesis of Arterial Pressure Mayer Waves from Heart Rate and Sympathetic Activity [PDF]
, 1997 Both theoretic models and cross-spectral analyses suggest that an oscillating sympathetic nervous outflow generates the low frequency arterial pressure fluctuations termed Mayer waves. Fluctuations in heart rate also have been suggested to relate closely
Myers, Christopher +3 more
core +3 more sources