Results 41 to 50 of about 3,756 (169)

Evaluating changes in pulse transit time drop index in patients with obstructive sleep apnea before and during CPAP therapy

The Clinical Respiratory Journal, 2022
Airflow limitation in patients with obstructive sleep apnea (OSA) leads to arousal, increased sympathetic nervous system activity, and elevated blood pressure, which causes a decrease in pulse transit time (PTT).
Elham Kalantari, Forough Kalantari, Maryam Edalatifard, Besharat Rahimi   +3 more
doaj   +1 more source

Effects of slow and regular breathing exercise on cardiopulmonary coupling and blood pressure [PDF]

, 2016
Investigation of the interaction between cardiovascular variables and respiration provides a quantitative and noninvasive approach to assess the autonomic control of cardiovascular function.
Chai, Xiaoke, Peng, Chung-Kang, Wang, Buqing, Wang, Weidong, Wu, Hao, Zhang, Zhengbo   +5 more
core   +1 more source

Cuffless and Continuous Blood Pressure Monitoring Using a Single Chest-Worn Device

IEEE Access, 2019
Continuous blood pressure (BP) monitoring in daily life is needed to enable early detection of hypertension and improve its control. Although pulse transit time (PTT)-based BP estimation represents a promising approach, it still lacks of performance in ...
Jonghyun Park, Seungman Yang, Jangjay Sohn, Joonnyong Lee, Saram Lee, Yunseo Ku, Hee Chan Kim   +6 more
doaj   +1 more source

Observational Study of Pulse Transit Time in Children With Sleep Disordered Breathing

Frontiers in Neurology, 2020
Background: Pulse transit time (PTT) is a non-invasive measure of arousals and respiratory effort for which we aim to identify threshold values that detect sleep disordered breathing (SDB) in children.
Michael P. Yanney, Andrew P. Prayle, Andrew P. Prayle, Nicola J. Rowbotham, Miguel Kurc, Sean Tilbrook, Nabeel Ali   +6 more
doaj   +1 more source

Beat-to-beat ambulatory blood pressure estimation based on random forest [PDF]

, 2016
Ambulatory blood pressure is critical in predicting some major cardiovascular events; therefore, cuff-less and noninvasive beat-to-beat ambulatory blood pressure measure-ment is of great significance.
He, R, Huang, ZP, Ji, LY, Li, H, Wu, JK, Zhang, ZQ   +5 more
core   +1 more source

Effect of a Percutaneous Coronary Intervention Procedure on Heart Rate Variability and Pulse Transit Time Variability: A Comparison Study Based on Fuzzy Measure Entropy

Entropy, 2016
Percutaneous coronary intervention (PCI) is a common treatment method for patients with coronary artery disease (CAD), but its effect on synchronously measured heart rate variability (HRV) and pulse transit time variability (PTTV) have not been well ...
Guang Zhang, Chengyu Liu, Lizhen Ji, Jing Yang, Changchun Liu   +4 more
doaj   +1 more source

Exploring the Potential of Pulse Transit Time as a Biomarker for Sleep Efficiency through a Comparison Analysis with Heart Rate and Heart Rate Variability

Sensors, 2023
The relationship between sleep dynamics and blood pressure (BP) changes is well established. Moreover, sleep efficiency and wakefulness during sleep (WASO) events have a significant impact on BP dipping.
Jenna Bridges, Hossein Hamidi Shishavan, Adrian Salmon, Mark Metersky, Insoo Kim   +4 more
doaj   +1 more source

Estimating Blood Pressure from Photoplethysmogram Signal and Demographic Features using Machine Learning Techniques

, 2020
Hypertension is a potentially unsafe health ailment, which can be indicated directly from the Blood pressure (BP). Hypertension always leads to other health complications. Continuous monitoring of BP is very important; however, cuff-based BP measurements
Chowdhury, Moajjem Hossain, Chowdhury, Muhammad E. H., Khandakar, Amith, Mahbub, Zaid B, Reaz, Mamun Bin Ibne, Shuzan, Md Nazmul Islam, Uddin, M. Monir   +6 more
core   +1 more source

Pulse transit time measured by photoplethysmography improves the accuracy of heart rate as a surrogate measure of cardiac output, stroke volume and oxygen uptake in response to graded exercise [PDF]

, 2015
Heart rate (HR) is a valuable and widespread measure for physical training programs, although its description of conditioning is limited to the cardiac response to exercise.
Dacso, C.C., Padhye, N.S., Pollonini, L., Re, R., Simpson, R.J., Torricelli, A.   +5 more
core   +1 more source

Pulse Transit Time and Finger to Finger ∆T Measurement in Reactive Hyperemia: A Comparative Study [PDF]

Kirkuk Journal of Medical Sciences
Background: Reactive hyperemia (RH) is a temporary increase in blood flow following ischemia and serves as a marker of vascular health by reflecting reductions in arterial stiffness.
Hassan Hussein, Fezaa Neda, Bassam AlGailani   +2 more
doaj   +1 more source