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Abstract

Welcome to this Frontiers in Physiology Research Topic Collection on the Advances in Basic and Applied Research in Photoplethysmography.

Photoplethysmography (PPG) is a vascular optics technique that can be used to detect blood volume changes in the microvascular bed of tissue with each heartbeat (Allen 2007, Kyriacou and Allen 2021). In recent decades there has been a significant increase in the number of published articles describing basic and applied research in PPG, hailing it as a non-invasive, low cost, and simple optical measurement technique applied at the surface of the skin to measure a whole host of physiological parameters. The popularity of this topic can be attributed to the realization that PPG has important implications for a wide range of applications including cardiovascular system assessment, vital signs monitoring including non-invasive blood pressure estimation and heart rate, and the study of pain. In addition, the recent significant contributions of PPG to wearable devices have had a major impact on the popularity and usability of PPG. There is currently a large body of literature contributing new knowledge on the relation of the PPG pulse morphology, pulse wave analysis and pulse features extraction with the physiological status of peripheral blood vessels, such as vascular ageing and stiffness, blood pressure and compliance, microvascular disease, autonomic function, amongst others. There are also significant efforts in the utilization of the PPG for the detection of heart arrhythmias such as Atrial Fibrillation (AF). Researchers are continuing to strive in combining the PPG sensory capabilities of wearables, such as smartwatches, with Artificial Intelligence (AI) machine learning approaches in delivering ubiquitous health monitoring solutions that go beyond the current available consumer devices. The motivation and aim of this Research Topic is to bring together the latest cutting edge basic and applied research in the field of Photoplethysmography. The Research Topic for Frontiers in Physiology: Computational Physiology and Medicine showcases 16 original research papers covering a diverse range of contributions in the broad field of PPG measurement and analysis.

Publication Type:	Article
Additional Information:	© 2024 Allen and Kyriacou. This is an openaccess article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Publisher Keywords:	photoplethysmography, pulse wave analysis, diagnostic, physiology, optical, machine learning, cardiovascular
Subjects:	Q Science > QA Mathematics > QA75 Electronic computers. Computer science R Medicine > RC Internal medicine R Medicine > RE Ophthalmology T Technology
Departments:	School of Science & Technology School of Science & Technology > Engineering
SWORD Depositor:	Symplectic Administrator

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