Results 61 to 70 of about 1,713,582 (410)

A Self-Supervised Algorithm for Denoising Photoplethysmography Signals for Heart Rate Estimation from Wearables [PDF]

arXiv, 2023
Smart watches and other wearable devices are equipped with photoplethysmography (PPG) sensors for monitoring heart rate and other aspects of cardiovascular health. However, PPG signals collected from such devices are susceptible to corruption from noise and motion artifacts, which cause errors in heart rate estimation.
arxiv  

Time Series Analysis using Embedding Dimension on Heart Rate Variability [PDF]

, 2018
Heart Rate Variability (HRV) is the measurement sequence with one or more visible variables of an underlying dynamic system, whose state changes with time. In practice, it is difficult to know what variables determine the actual dynamic system.
Abarbanel, Casimiro, Chatfield, Chun-Hua, Frank, Kennel, Kruskal, Malik, McCraty, Ng, Robinson, Takens, Tough, Wendi, Zhong   +14 more
core   +1 more source

Taurine promotes glucagon‐like peptide‐1 secretion in enteroendocrine L cells

FEBS Letters, EarlyView.
Taurine, a sulfur‐containing amino acid, is likely taken up by enteroendocrine L cells via the taurine transporter. This process increases the levels of cytosolic ATP. The increase in intracellular Ca2+ concentrations and glucagon‐like peptide‐1 secretion through membrane depolarization is caused by the closure of ATP‐sensitive potassium channels ...
Yuri Osuga, Kazuki Harada, Takuya Yamauchi, Tetsuya Kitaguchi, Masami Yokota Hirai, Mitsuharu Matsumoto, Takashi Tsuboi   +6 more
wiley   +1 more source

Heart Rate Variability in Newborns

Physiological Research, 2017
Heart rate (HR) and heart rate variability (HRV) in newborns is influenced by genetic determinants, gestational and postnatal age, and other variables. Premature infants have a reduced HRV. In neonatal HRV evaluated by spectral analysis, a dominant activity can be found in low frequency (LF) band (combined parasympathetic and sympathetic component ...
Mirko Zibolen, Z. Lehotska, Zuzana Uhrikova, Michal Javorka, Marek Kozar, Kamil Javorka, Branislav Kolarovszki   +6 more
openaire   +3 more sources

The accumulation of myeloid‐derived suppressor cells participates in abdominal infection‐induced tumor progression through the PD‐L1/PD‐1 axis

Molecular Oncology, EarlyView.
This study explores how sepsis affects GC progression by creating an immunosuppressive environment. Our findings reveal that sepsis promotes immune dysregulation, enhancing tumor growth and metastasis. Targeting the PD‐1/PD‐L1 pathway with monoclonal antibodies shows potential for restoring immune function and improving outcomes in cancer patients ...
Yiding Wang, Ting Guo, Xiaofang Xing, Xijuan Liu, Xuejun Gan, Yingai Li, Yan Liu, Fei Shan, Zhouqiao Wu, Jiafu Ji, Ziyu Li   +10 more
wiley   +1 more source

Decreased Heart Rate Variability in COVID-19

Intensive Care Research, 2022
Purpose Coronavirus disease 2019 (COVID-19) is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which primarily infects the lower airways and binds to angiotensin-converting enzyme 2 (ACE2) on alveolar epithelial cells.
Chengfen Yin, Jianguo Li, Zhiyong Wang, Yongle Zhi, Lei Xu   +4 more
doaj   +1 more source

Predict Daily Life Stress based on Heart Rate Variability [PDF]

, 2020
Department of Human Factors EngineeringThe purpose of this study is to investigate the feasibility of predicting a daily mental stress level from analyzing Heart Rate Variability (HRV) by using a Photoplethysmography (PPG) sensor which is integrated in ...
Park, Jongwoo
core  

Assessment of fetal heart rate variability and velocity variability by Doppler velocimetry of the descending aorta at 10-20 weeks of gestation [PDF]

, 1999
Objectives: Determination of gestational age-related modulations in fetal heart rate and descending aorta blood flow velocity in the early human fetus and comparison of aortic variability data with data obtained from the umbilical artery.
Clark, E.B., Hop, W.C.J. (Wim), Keller, B.B. (Bradley), Ursem, N.T.C. (Nicolette), Wladimiroff, J.W. (Juriy)   +4 more
core   +3 more sources

Circadian rhythm of heart rate and heart rate variability [PDF]

Archives of Disease in Childhood, 2000
Measurements of heart rate variability (HRV) are increasingly used as markers of cardiac autonomic activity.To examine circadian variation in heart rate and HRV in children.A total of 57 healthy infants and children, aged 2 months to 15 years, underwent ambulatory 24 hour Holter recording.
Krystel Maeyns, Martial M. Massin, Françoise Ravet, Nadia Withofs, Paul Gérard   +4 more
openaire   +3 more sources

Inhibition of acyl‐CoA synthetase long‐chain isozymes decreases multiple myeloma cell proliferation and causes mitochondrial dysfunction

Molecular Oncology, EarlyView.
Triacsin C inhibition of the acyl‐CoA synthetase long chain (ACSL) family decreases multiple myeloma cell survival, proliferation, mitochondrial respiration, and membrane potential. Made with Biorender.com. Multiple myeloma (MM) is an incurable cancer of plasma cells with a 5‐year survival rate of 59%.
Connor S. Murphy, Heather Fairfield, Victoria E. DeMambro, Samaa Fadel, Carlos A. Gartner, Michelle Karam, Christian Potts, Princess Rodriguez, Ya‐Wei Qiang, Habib Hamidi, Xiangnan Guan, Calvin P. H. Vary, Michaela R. Reagan   +12 more
wiley   +1 more source