Results 111 to 120 of about 7,515 (209)

Pulmonary arterial mechanoreceptors modulate exercise‐induced sympathetic activation in healthy humans during moderate‐intensity hypoxic exercise

The Journal of Physiology, EarlyView.
Abstract figure legend This randomized cross‐over trial (N = 12) addressed the hypothesis that selective reduction of pulmonary arterial pressure (i.e. manipulation of pulmonary arterial mechanoreceptor activation) during hypoxic exercise would reduce sympathetic outflow (muscle sympathetic nerve activity (MSNA)) in healthy humans.
Michiel T. Ewalts, Thomas D. Griffiths, Andrew J. M. Douglas, Elliott J. Jenkins, Guto Wyn Hughes, Craig D. Steinback, Lydia L. Simpson, Samuel J. Oliver, Mike Stembridge, Jonathan P. Moore   +9 more
wiley   +1 more source

Physiological mechanisms underlying enhanced performance with blood flow restriction training: neuromuscular, vascular and metabolic adaptations

The Journal of Physiology, EarlyView.
Abstract figure legend We investigated how 6 weeks of dynamic knee‐extensor interval training with blood flow restriction (BFR‐leg) and without (CTRL‐leg) impacts performance and its mechanisms using non‐invasive methods. Specifically, we used gold‐standard methods to assess neuromuscular function, vascular function using Doppler ultrasound, and near ...
Colin Lavigne, Valentin Mons, Clément Lemineur, Oliver Meste, Georges Lefthériotis, Grégory M. Blain   +5 more
wiley   +1 more source

An image-processing toolkit for remote photoplethysmography

Multimedia Tools and Applications
Abstract Objective. Image-processing-based remote photoplethysmography algorithms are usually composed of steps where different methods are used, and often, researchers perform these steps using methods that are not necessarily the best for their application.
Javier Montalvo, Álvaro García-Martín, José M. Martínez   +2 more
openaire   +1 more source

Role of reactive oxygen species in mediating peripheral hypoxic vasodilation and sympathoexcitation at high altitude

The Journal of Physiology, EarlyView.
Abstract figure legend High‐altitude acclimatisation increases muscle sympathetic nerve activity (MSNA) via activation of the arterial chemoreflex, pulmonary arterial baroreceptors and resetting of the sympathetic vascular baroreflex. However attempting to silence these mechanisms only partially normalises MSNA, implicating other contributory ...
Liam D. Corr, Andrew J. M. Douglas, Elliott J. Jenkins, Lauren E. Maier, Jodie L. Koep, Travis D. Gibbons, Adam Field, James D. Anholm, Katharine Foster, Zoe H. Adams, Lydia L. Simpson, Jonathan P. Moore, Tinna Traustadottir, Christoph Siebenmann, Joshua C. Tremblay, Mike Stembridge   +15 more
wiley   +1 more source

Imaging Photoplethysmography: a Real-time Signal Quality Index

Computing in Cardiology Conference (CinC), 2017
Imaging photoplethysmography (iPPG) is a promising technology for contactless heart rate (HR) monitoring. However iPPG signals are easily deteriorated by subject movements and illumination changes. The purpose of this study was to develop a signal quality index (SQI) for realtime HR monitoring applications and to assess its performance on a challenging
Sibylle Fallet, Yann Schoenenberger, Lionel Martin, Fabian Braun, Virginie Moser, Jean-Marc Vesin   +5 more
openaire   +1 more source

Revolutionizing Heart Failure Management With Artificial Intelligence: A Narrative Review of Diagnostic, Prognostic, and Therapeutic Innovations

Health Science Reports, Volume 9, Issue 4, April 2026.
ABSTRACT Background and Aims Heart failure (HF) remains a major global health burden, affecting over 64 million individuals worldwide. Early detection and optimal management are often limited by subjective interpretation of diagnostic tests and variable clinical expertise. Artificial intelligence (AI) has emerged as a transformative technology that can
Farrukh Ansar, Muhammad Aamir Waheed, Usman Zafar, Abdulrahman Kolapo, Walid Sarfaraz, Khalid Rashid   +5 more
wiley   +1 more source

Exploring heart rate variability as a biomarker for frailty: A narrative review

European Journal of Clinical Investigation, Volume 56, Issue 4, April 2026.
Frailty arises from progressive multisystem dysregulation, prompting interest in biomarkers that capture declining physiological reserve. This review positions heart rate variability (HRV) within this evolving biomarker landscape, outlining its physiological basis, analytical domains and relevance to clinical research.
Luca Tagliafico, Silvia Ottaviani, Riccardo Balzano, Stefania Peruzzo, Alessio Nencioni, Fiammetta Monacelli   +5 more
wiley   +1 more source

Development of a Dynamic Fluid Phantom - Setup and Validation for an Optical Sensor

Current Directions in Biomedical Engineering
We present a custom fluid phantom usable in the development of sensing technologies to assess the pulse wave. The phantom provides adjustable flow and pressure to an interchangeable target volume and integrates sensors to provide reference readings on ...
Hruschka David, Wiedenhoff Henri, Fleischhauer Vincent, Woyczyk Alexander, Zaunseder Sebastian   +4 more
doaj   +1 more source

Vasomotor assessment by camera-based photoplethysmography

Current Directions in Biomedical Engineering, 2016
Camera-based photoplethysmography (cbPPG) is a novel technique that allows the contactless acquisition of cardio-respiratory signals. Previous works on cbPPG most often focused on heart rate extraction.
Trumpp Alexander, Schell Joachim, Malberg Hagen, Zaunseder Sebastian   +3 more
doaj   +1 more source

Cerebral and Peripheral Hemodynamics Across Wakefulness and NREM Sleep

Journal of Sleep Research, Volume 35, Issue 2, April 2026.
ABSTRACT Wake/sleep‐related changes in cerebral hemodynamic oscillations are well established, but similar changes in peripheral hemodynamics remain largely understudied. Moreover, how the relationship between cerebral and peripheral hemodynamics varies across sleep–wake states is not well understood, despite evidence that these oscillations in the low‐
Vidhya V. Nair, Brianna R. Kish, Hideyuki Oshima, Qiuting Wen, Yunjie Tong, A. J. Schwichtenberg   +5 more
wiley   +1 more source