Results 81 to 90 of about 24,907 (232)

Baroreflex Sensitivity Measured by Pulse Photoplethysmography

open access: yesFrontiers in Neuroscience, 2019
Novel methods for assessing baroreflex sensitivity (BRS) using only pulse photoplethysmography (PPG) signals are presented. Proposed methods were evaluated with a data set containing electrocardiogram (ECG), blood pressure (BP), and PPG signals from 17 ...
Jesús Lázaro   +9 more
doaj   +1 more source

An Interpretable Machine Vision Approach to Human Activity Recognition using Photoplethysmograph Sensor Data [PDF]

open access: yes, 2018
The current gold standard for human activity recognition (HAR) is based on the use of cameras. However, the poor scalability of camera systems renders them impractical in pursuit of the goal of wider adoption of HAR in mobile computing contexts ...
Brophy, Eoin   +4 more
core   +1 more source

Reflectance Photoplethysmography as Non-Invasive Monitoring of Tissue Blood Perfusion. [PDF]

open access: yes, 2015
In the last decades Photoplethysmography (PPG) has been used as noninvasive technique for monitoring arterial oxygen saturation by Pulse Oximetry (PO), whereas Near Infrared Spectroscopy (NIRS) has been employed for monitoring tissue blood perfusion ...
Abay, T., Kyriacou, P. A.
core   +1 more source

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

open access: yesInternational 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   +11 more
wiley   +1 more source

Intestinal perfusion monitoring using photoplethysmography [PDF]

open access: yesJournal of Biomedical Optics, 2013
In abdominal trauma patients, monitoring intestinal perfusion and oxygen consumption is essential during the resuscitation period. Photoplethysmography is an optical technique potentially capable of monitoring these changes in real time to provide the medical staff with a timely and quantitative measure of the adequacy of resuscitation.
Tony J, Akl   +3 more
openaire   +2 more sources

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

open access: yes, 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  

Accuracy of reflectance photoplethysmography on detecting cuff-induced vascular occlusions [PDF]

open access: yes, 2015
Photoplethysmography (PPG) is a noninvasive optical technique, which can also be used to derive important parameters other than arterial oxygen saturation (SpO2).
Abay, T., Kyriacou, P. A.
core   +1 more source

Dynamic Mode Decomposition (DMD) for Low‐Latency Real‐Time Cardiac MRI

open access: yesMagnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To demonstrate dynamic mode decomposition (DMD) for high spatiotemporal low‐latency online reconstruction in 2D real‐time cardiac MRI. Methods DMD was applied to 2D spiral balanced steady state free precession (bSSFP) real‐time adult and fetal cardiac MRI at 0.55 T, with data from 10 healthy adult volunteers (3F/7M; age: 21–49; BMI: 20–
Ecrin Yagiz   +5 more
wiley   +1 more source

Exploring the Possibility of Photoplethysmography-Based Human Activity Recognition Using Convolutional Neural Networks

open access: yesSensors
Various sensing modalities, including external and internal sensors, have been employed in research on human activity recognition (HAR). Among these, internal sensors, particularly wearable technologies, hold significant promise due to their lightweight ...
Semin Ryu   +3 more
doaj   +1 more source

Sympatho‐Excitation in Pulmonary Hypertension: The Potential Role of Pulmonary Arterial Baroreceptors: An Acute Physiologic Intervention Study

open access: yesRespirology, EarlyView.
Pulmonary arterial baroreceptors reflexively stimulate sympathetic nerve activity (SNA) in response to elevated pulmonary artery pressure and distension. In pulmonary hypertension patients, changes in muscle SNA were proportional to changes in pulmonary haemodynamics following nebulised iloprost.
Michael J. Plunkett   +6 more
wiley   +1 more source

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