Results 61 to 70 of about 20,121 (213)

A Novel Nonlinear Method for Cardiovascular Data Synchronization

IEEE Access
This study introduces and evaluates a novel nonlinear technique for synchronizing electrocardiogram (ECG) and photoplethysmogram (PPG) signals by embracing the intrinsic relationship between heart rate variability (HRV) and pulse rate variability (PRV ...
Daniele Padovano, Arturo Martinez-Rodrigo, Norbert Marwan, Santiago Mula Munoz, Jose J. Rieta, Raul Alcaraz   +5 more
doaj   +1 more source

Photoplethysmography for bovine heat detection: the preliminary results [PDF]

, 2020
In this study, we applied photoplethysmography (PPG) as an alternative, convenient, and affordable method for bovine heat detection. Heat detection is an essential part of effective herd reproduction management. Currently, there are many different heat
Janis Spigulis, Eva Štruc, Plavšić, Aleksandar, Štruc, Eva, Aleksandar Plavšic, Spīgulis, Jānis, Blaž Cugmas, Cugmas, Blaž   +7 more
core   +1 more source

A Review of Automatic Measurement of Learning Engagement Using Body Clues

Future in Educational Research, EarlyView.
ABSTRACT Learning engagement is an overarching multifaceted construct that includes behavioral, cognitive, and emotional dimensions. The static subjective measurements may lead to inaccurate results. Considering the authenticity and reliability of body signals, this study investigated the types of body cues used in measuring learning engagement and ...
Qi Xu, Yantao Wei, Yafei Shi, Qingtang Liu, You Yu, Guangrun Xiao   +5 more
wiley   +1 more source

Fully Automated Photoplethysmography-Based Wearable Atrial Fibrillation Screening in a Hospital Setting

Diagnostics
Background/Objectives: Atrial fibrillation (AF) remains a major risk factor for stroke. It is often asymptomatic and paroxysmal, making it difficult to detect with conventional electrocardiography (ECG).
Khaled Abdelhamid, Pamela Reissenberger, Diana Piper, Nicole Koenig, Bianca Hoelz, Julia Schlaepfer, Simone Gysler, Helena McCullough, Sebastian Ramin-Wright, Anna-Lena Gabathuler, Jahnvi Khandpur, Milene Meier, Jens Eckstein   +12 more
doaj   +1 more source

Monitoring and assessment for obstructive sleep apnea

FlexMat, EarlyView.
This review systematically classifies Obstructive Sleep Apnea (OSA) monitoring indicators into three categories: physical, biochemical, and electrophysiological indicators, and lists several methods for each category. Abstract Obstructive sleep apnea (OSA) is a common chronic sleep‐disordered breathing disease characterized by recurrent upper airway ...
Yaowen Xu, Feifei Lin, Shujiao Chen, Zhen You, Shujing Zhu, Weiwei Zhao, Qiang Zhao   +6 more
wiley   +1 more source

Body‐integrated photonic biosensors: Illuminating the path to active healthcare

FlexMat, EarlyView.
Body‐integrated photonic biosensors are promising tools for active healthcare. These optical devices can be worn, implanted, or swallowed to monitor health signals continuously. This review introduces key sensing modalities, including fluorescence, colorimetry, SPR, LSPR, SERS, and light‐modulating materials.
Jiayue Gu, Xingming Wen, Qihang Yan, Yining Zhao, Linghao Yuan, Siyuan Chen, Yue Ma, Zhengyue Fang, Dong Lei, Yuxin Liu, Ze Xiong   +10 more
wiley   +1 more source

Photoplethysmography‐Derived Arterial Stiffness Index Delivered Greater Cardiovascular Prevention Value to Non‐Elderly: A Retrospective Cohort Study Based on UK Biobank

The Journal of Clinical Hypertension
Photoplethysmography‐derived arterial stiffness index (ASI) has been proven to be associated with various cardiovascular diseases. The present study aims to determine whether the predictive value of ASI varies between elderly and non‐elderly and whether ...
Hongyu Chen, Fangfang Fan, Ziliang Ye, Zhe Liang, Xianhui Qin, Yan Zhang   +5 more
doaj   +1 more source

An Overview of Non-contact Photoplethysmography [PDF]

, 2017
Photoplethysmography (PPG) is a method which is used to extract physiological parameters such as heart pulse rate, respirotary rate, and their variation with respect to time by optically measuring the blood volume change in the tissue ...

core  

Flexible wearable electronics for cardiovascular monitoring from surface signals to deep physiological insights

FlexMat, EarlyView.
This review organizes flexible wearable electronics for cardiovascular monitoring into four interconnected information layers: surface electrophysiology, hemodynamic sensing, vascular imaging, and biofluid biomarker analysis. This framework clarifies how electrical rhythm, vascular loading, structural and flow‐related features, and biochemical states ...
Qiao Chen, Hongwen Chen, Yuanyuan Li, Pingan Yang, Rui Li, Zhihao Zhou   +5 more
wiley   +1 more source

Analysis of the Effect of Skin Pigmentation and Oxygen Saturation on Monte Carlo-Simulated Reflectance Photoplethysmography Signals

Sensors
The effect of skin pigmentation on photoplethysmography and, specifically, pulse oximetry has recently received a significant amount of attention amongst researchers, especially since the COVID-19 pandemic.
Raghda Al-Halawani, Meha Qassem, Panicos A. Kyriacou   +2 more
doaj   +1 more source