Results 21 to 30 of about 3,314 (208)

A comparative study of single-channel signal processing methods in fetal phonocardiography.

PLoS ONE, 2022
Fetal phonocardiography is a non-invasive, completely passive and low-cost method based on sensing acoustic signals from the maternal abdomen. However, different types of interference are sensed along with the desired fetal phonocardiography.
Katerina Barnova, Radana Kahankova, Rene Jaros, Martina Litschmannova, Radek Martinek   +4 more
doaj   +1 more source

A Semi-automatic Heart Sounds Identification Model and Its Implementation in Internet of Things Devices

Advances in Electrical and Computer Engineering, 2021
Identification of heart sound signals in the form of a phonocardiogram (PCG) has recently attracted the attention of many researchers along with the development of small devices and global Internet connection in a way to offer automatic illness ...
JUSAK, J., PUSPASARI, I., KUSUMAWATI, W. I.   +2 more
doaj   +1 more source

Deep Learning Algorithm for Heart Valve Diseases Assisted Diagnosis

Applied Sciences, 2022
Heart sounds are mainly the expressions of the opening and closing of the heart valves. Some sounds are produced by the interruption of laminar blood flow as it turns into turbulent flow, which is explained by abnormal functioning of the valves.
Santiago Isaac Flores-Alonso, Blanca Tovar-Corona, René Luna-García   +2 more
doaj   +1 more source

Novel Approach to Assess Cardiac Function Using Systolic Performance and Myocardial Performance Indices From Simultaneous Electrocardiography and Phonocardiography Recordings in Dogs With Various Stages of Myxomatous Mitral Valve Disease

Frontiers in Veterinary Science, 2021
Background and Objective: Myxomatous mitral valve disease (MMVD) progression entails changes in the structural and functional properties of the heart affecting cardiac timings and intervals within the cardiac cycle.
Karlo Romano B. Gicana, Karlo Romano B. Gicana, Tuchakorn Lertwanakarn, Kittipong Tachampa   +3 more
doaj   +1 more source

Health Monitoring via Heart, Breath, and Korotkoff Sounds by Wearable Piezoelectret Patches

Advanced Science, Volume 10, Issue 28, October 6, 2023., 2023
Flexible piezoelectret patches are developed to examine audio physiological signals from cardiovascular and respiratory systems, including heart, Korotkoff, and breath sounds. A customized electromagnetic shielding structure is designed for precision and high‐fidelity measurements and several unique physiological sound patterns have been collected and ...
Liuyang Han, Weijin Liang, Qisen Xie, JingJing Zhao, Ying Dong, Xiaohao Wang, Liwei Lin   +6 more
wiley   +1 more source

Low‐Intensity Sensitive and High Stability Flexible Heart Sound Sensor Enabled by Hybrid Near‐Field/Far‐Field Electrospinning

Advanced Functional Materials, Volume 33, Issue 29, July 18, 2023., 2023
A hybrid near‐field/far‐field electrospinning approach is defined to achieve low‐cost fabrication and optimization of triboelectric heterostructures for heart sound sensing. The new near‐field patterned polyurethane grid spacers promote vibration enhancement and charge trapping, demonstrating record high sensitivity of 7027 mV Pa−1 and low detection ...
Yihao Li, Yan Huang, Ni Zhao
wiley   +1 more source

PRACTICAL IMPLEMENTATION OF IMPEDANCE REOGRAPHY IN CARDIOLOGY – NEW APPROACHES

Alʹmanah Kliničeskoj Mediciny, 2016
Background: The impedance rheocardiography is a  simple, inexpensive, noninvasive method of assessment of central hemodynamics that can be used for detection of cardiovascular remodeling and thus promote an improvement of cardiovascular mortality. Modern
A. A. Dumler, S. Yu. Podtaev, R. A. Stepanov, P. G. Frick   +3 more
doaj   +1 more source

Association of plasma bone morphogenetic protein‐4 levels with arterial stiffness in hypertensive patients

Journal of Clinical Laboratory Analysis, Volume 36, Issue 11, November 2022., 2022
Arterial stiffness can interact with hypertension, thereby becoming an early marker of hypertension‐mediated targeted organ damage. Plasma levels of BMP‐4 have the ability to identify increased arterial stiffness in patients with hypertension. CAVI, cardio‐ankle vascular index; BMP‐4, bone morphogenetic protein‐4. Abstract Background Arterial stiffness
Ning Wang, Ying Guo, Ying Dong, Xueting Li, Qian Liu, Qi Liu, Guohong Wang, Mingzhao Qin, Zhenzhou Zhang, Jiawei Song, Lirong Liang, Jiuchang Zhong   +11 more
wiley   +1 more source

Phonocardiopulmography: the future of perioperative auscultation [PDF]

Anesthesia and Pain Medicine
Traditionally, anesthesiologists have recommended performing auscultation of breath and heart sounds with a precordial or esophageal stethoscope during anesthesia.
Sung-Hoon Kim
doaj   +1 more source

A phonocardiographic-based fiber-optic sensor and adaptive filtering system for noninvasive continuous fetal heart rate monitoring [PDF]

, 2017
This paper focuses on the design, realization, and verification of a novel phonocardiographic-based fiber-optic sensor and adaptive signal processing system for noninvasive continuous fetal heart rate (fHR) monitoring.
Bilík, Petr, Fajkus, Marcel, Janků, Petr, Kahánková, Radana, Kepák, Stanislav, Konečný, Jaromír, Martinek, Radek, Nazeran, Homer, Nedoma, Jan   +8 more
core   +2 more sources