Results 121 to 130 of about 17,709 (302)

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

Photoplethysmography using a smartphone [PDF]

, 2023
The diploma thesis deals with the use of digital photoplethysmography (PPG) technology. The thesis describes the process of acquisition of the photoplethysmographic curve using a smartphone, preprocessing of the PPG signal, calculation of parameters and ...
Dräxler, Vladislav
core   +2 more sources

Analysis of Melanin Concentration on Reflective Pulse Oximetry Using Monte Carlo Simulations

IEEE Access
We investigate the impact of melanin concentration on the accuracy of oxygen saturation SpO2 estimation using reflective photoplethysmography (PPG) measurements.
Maximilian Reiser, Oliver Amft, Andreas Breidenassel   +2 more
doaj   +1 more source

Development of an intraluminal intestinal photoplethysmography sensor [PDF]

, 2017
Intestinal ischemia is a serious medical condition and can lead to life threatening sepsis. Currently, there are no reliable techniques available for directly monitoring intestinal viability for prolonged periods of time, and intraoperatively, the ...
Patel, Z., Zaibaa Patel, Mohamed A. Thaha, Panayiotis A. Kyriacou, Thaha, M. A., Kyriacou, P. A.   +5 more
core   +1 more source

Vascular dysfunction in women with recurrent pregnancy loss: Possible association with antiphospholipid antibodies

International Journal of Gynecology &Obstetrics, Volume 169, Issue 1, Page 206-214, April 2025.
Abstract Objective Antiphospholipid antibodies (aPL) are recognized to have a pivotal role in recurrent pregnancy loss (RPL) and cardiovascular disease. Therefore, we assessed the vascular function of women with RPL and examined the association with each type of aPL.
Titi Yang, Emi Okada, Maho Todoroki, Siyu Liu, Rukmali Athurupana, Kumie Kataoka, Chiaki Kashino, Takashi Mitsui, Toru Hasegawa, Yasuhiko Kamada, Hisashi Masuyama, Mikiya Nakatsuka   +11 more
wiley   +1 more source

Structural and functional state of various zones of skin microcirculation in men with isolated diastolic hypertension

Russian Open Medical Journal
The objective of our study was to assess the structural and functional characteristics of various skin microcirculation zones in men with newly diagnosed isolated diastolic hypertension (IDH).
Andrei I. Korolev, Andrei A. Fedorovich, Aleksander Yu. Gorshkov, Valida A. Dadaeva, Mikhail G. Chaschin, Anna V. Strelkova, Ksenia V. Omelyanenko, Maria A. Mikhailova, Oxana M. Drapkina   +8 more
doaj   +1 more source

Série fracionada da extensão de joelho proporciona maiores respostas cardiovasculares que séries contínuas Discontinuous sets of knee extensions induce higher cardiovascular responses in comparison to continuous ones

Arquivos Brasileiros de Cardiologia, 2008
FUNDAMENTO: O exercício de força pode proporcionar significativas respostas cardiovasculares durante sua execução, sendo interessante traçar estratégias para reduzí-las sem comprometer a produção de força. OBJETIVO: Comparar as respostas cardiovasculares
Marcos Doederlein Polito, Roberto Simão, Vitor Agnew Lira, Antônio Cláudio Lucas da Nóbrega, Paulo de Tarso Veras Farinatti   +4 more
doaj   +1 more source

CardiacDP: An R package for rapid automated cardiac data processing, integrating autocorrelation, a genetic algorithm, and a tracking index

Limnology and Oceanography: Methods, EarlyView.
Abstract Heart rate is a popular proxy of physiological responses, but the highly complex and variable cardiac data obtained from organisms such as marine invertebrates pose a major challenge to efficient and accurate data processing. To address this, we developed a novel, integrative algorithm for rapid and automated cardiac data processing.
Sarah L. Y. Lau, Adrian T. C. Wong, Yi‐Fei Gu, Tin Yan Hui   +3 more
wiley   +1 more source

A Comparative Survey of Methods for Remote Heart Rate Detection From Frontal Face Videos

Frontiers in Bioengineering and Biotechnology, 2018
Remotely measuring physiological activity can provide substantial benefits for both the medical and the affective computing applications. Recent research has proposed different methodologies for the unobtrusive detection of heart rate (HR) using human ...
Chen Wang, Thierry Pun, Thierry Pun, Guillaume Chanel, Guillaume Chanel   +4 more
doaj   +1 more source

TRACC‐PHYSIO: Time‐Domain Resolution‐Aligned Cross‐Correlation to Estimate PHYSIOlogical Coupling and Time Delays in Dynamic MRI

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To validate a method to assess cardiac and respiratory brain pulsations in slowly sampled dynamic MR scans. Cardiac and respiratory pulsations are key drivers of neurofluid circulation. However, resolving their temporal dynamics requires fast imaging, which is not achievable in many dynamic MR acquisitions.
Adam M. Wright, Jianing Zhang, Yunjie Tong, Qiuting Wen   +3 more
wiley   +1 more source