Toward continuous ambulatory monitoring using a wearable and wireless ECG- recording system: A study on the effects of signal quality on arrhythmia detection

2014 ◽  
Vol 24 (1) ◽  
pp. 391-404 ◽  
Author(s):  
Tanatorn Tanantong ◽  
Ekawit Nantajeewarawat ◽  
Surapa Thiemjarus
Keyword(s):  
Ambulatory Monitoring ◽  
Recording System ◽  
Signal Quality ◽  
Arrhythmia Detection ◽  
System A

Neural Network for Automatic Analysis of Motility Data

1994 ◽  
Vol 33 (01) ◽  
pp. 157-160 ◽  
Author(s):  
S. Kruse-Andersen ◽  
J. Kolberg ◽  
E. Jakobsen
Keyword(s):  
Neural Network ◽  
Muscular Activity ◽  
Recording System ◽  
Automatic Analysis ◽  
Biologically Relevant ◽  
System A ◽  
The Neural Network ◽  
Valuable Method ◽  
Motor Abnormalities ◽  
Trained Network

Abstract:Continuous recording of intraluminal pressures for extended periods of time is currently regarded as a valuable method for detection of esophageal motor abnormalities. A subsequent automatic analysis of the resulting motility data relies on strict mathematical criteria for recognition of pressure events. Due to great variation in events, this method often fails to detect biologically relevant pressure variations. We have tried to develop a new concept for recognition of pressure events based on a neural network. Pressures were recorded for over 23 hours in 29 normal volunteers by means of a portable data recording system. A number of pressure events and non-events were selected from 9 recordings and used for training the network. The performance of the trained network was then verified on recordings from the remaining 20 volunteers. The accuracy and sensitivity of the two systems were comparable. However, the neural network recognized pressure peaks clearly generated by muscular activity that had escaped detection by the conventional program. In conclusion, we believe that neu-rocomputing has potential advantages for automatic analysis of gastrointestinal motility data.

scholarly journals Cardiac arrhythmia detection outcomes among patients monitored with the Zio patch system: a systematic literature review

2019 ◽  
Vol 35 (10) ◽  
pp. 1659-1670 ◽  
Author(s):  
Mihran Yenikomshian ◽  
John Jarvis ◽  
Cody Patton ◽  
Christopher Yee ◽  
Richard Mortimer ◽  
...  
Keyword(s):  
Literature Review ◽  
Cardiac Arrhythmia ◽  
Systematic Literature Review ◽  
Arrhythmia Detection ◽  
System A

CONCEPT OF A SYSTEM DETERMINING TRAJECTORY AND FALL SITE OF FLYING OBJECTS

2020 ◽  
Vol 153 (1) ◽  
pp. 21-36
Author(s):  
Szymon Elert ◽  
Tomasz Kuczerski
Keyword(s):  
Data Transmission ◽  
Recording System ◽  
Computer Application ◽  
Transmission Channel ◽  
Data Recording ◽  
Basic Algorithm ◽  
Navigation Data ◽  
System A ◽  
Recorded Data ◽  
Initial Concept

The paper presents an initial concept of a flying object trajectory recording system employing a data recording algorithm (operating on the base of the raw recorded data) and radio transmittion modules. Operation of developed system is based on microcontroller Atmega, a magnetometer module, a gyroscope and acceleration meter, and a RF miniature transmitter and SDR receiver. The initial performance of application analysing and recording the data is provided. Moreover, subunits available on the market have been reviewed to select the modules dedicated to the system. A possibility for record-ing the transmitted navigation data was studied. Application of SDR receiver in combination with a computer application monitoring the data transmission channel up to 1 kilometre is described with the configuration of the system, and the schematic of measurement transmitting and receiving modules, and the surveillance of transmitted data quality. The basic algorithm of application using the received data for reconstruction of object’s flying path and prediction of a fall point is presented. Moreover an analysis is included for possible applications of the above mentioned system.

scholarly journals Demonstration of autonomous aerial acoustic recording systems to inventory Department of Defense bird populations

2021 ◽  
Author(s):  
David Buehler ◽  
Richard Fischer ◽  
John Wilkerson ◽  
Stacy Worley ◽  
David Smith ◽  
...  
Keyword(s):  
Department Of Defense ◽  
Recording System ◽  
Innovative Technology ◽  
Field Validation ◽  
Bird Populations ◽  
System A ◽  
Acoustic Recording ◽  
Validation Tests ◽  
Avian Populations ◽  
Avian Vocalizations

This demonstration project addressed the Department of Defense need for innovative technology for monitoring avian populations in inaccessible areas. This report presents results from field validation tests for an autonomous aerial acoustic recording system, a helium-filled weather balloon that transported an instrument payload over inaccessible areas (e.g., ordnance impact areas) to record avian vocalizations.

scholarly journals Signal Quality Assessment of a Novel ECG Electrode for Motion Artifact Reduction

Sensors ◽  
2021 ◽  
Vol 21 (16) ◽  
pp. 5548
Author(s):  
Hesam Halvaei ◽  
Leif Sörnmo ◽  
Martin Stridh
Keyword(s):  
Ambulatory Monitoring ◽  
Motion Artifact ◽  
Detection Performance ◽  
Motion Artifacts ◽  
Signal Quality ◽  
The Novel ◽  
Quality Indices ◽  
Qrs Detection ◽  
Time Frequency ◽  
The Cost

Background: The presence of noise is problematic in the analysis and interpretation of the ECG, especially in ambulatory monitoring. Restricting the analysis to high-quality signal segments only comes with the risk of excluding significant arrhythmia episodes. Therefore, the development of novel electrode technology, robust to noise, continues to be warranted. Methods: The signal quality of a novel wet ECG electrode (Piotrode) is assessed and compared to a commercially available, commonly used electrode (Ambu). The assessment involves indices of QRS detection and atrial fibrillation detection performance, as well as signal quality indices (ensemble standard deviation and time–frequency repeatability), computed from ECGs recorded simultaneously from 20 healthy subjects performing everyday activities. Results: The QRS detection performance using the Piotrode was considerably better than when using the Ambu, especially for running but also for lighter activities. The two signal quality indices demonstrated similar trends: the gap in quality became increasingly larger as the subjects became increasingly more active. Conclusions: The novel wet ECG electrode produces signals with less motion artifacts, thereby offering the potential to reduce the review burden, and accordingly the cost, associated with ambulatory monitoring.

The nursing care recording system. A preliminary study of a system for assessment of nursing care demands in the ICU

1992 ◽  
Vol 36 (7) ◽  
pp. 610-614 ◽  
Author(s):  
E. Hjortsø ◽  
T. Buch ◽  
J. Ryding ◽  
K. Lundstrøm ◽  
P. Bartram ◽  
...  
Keyword(s):  
Nursing Care ◽  
Recording System ◽  
System A ◽  
Preliminary Study ◽  
Care Demands

scholarly journals Cross-Correlation based comparison between the conventional 12-lead ECG and an EASI derived 12-lead ECG

2018 ◽  
Vol 4 (1) ◽  
pp. 621-624
Author(s):  
Melanie Holderith ◽  
Thomas Schanze
Keyword(s):  
Visual Inspection ◽  
Cross Correlation ◽  
Quantitative Comparison ◽  
Recording System ◽  
Electrode Placement ◽  
Signal Quality ◽  
Time Lags ◽  
Electrical Sensing ◽  
Time Courses ◽  
High Degree

AbstractThe 12-channel ECG is an important tool used for the diagnosis and treatment of various cardiac and other related diseases. The recording procedure requires the exact placement of 10 electrodes on the patients, because incorrect placement can lead to improper signals and, consequently, to false diagnoses. In addition, the placement of 10 electrodes is time consuming, often interferes with clinical processes, and is less patient-friendly. One possible solution could be the usage of a vector-based, 5-electrode, 12-lead monitoring ECG system (EASI). The aim of this work is to establish a quantitative comparison between the conventional 12-lead ECG and an EASI ECG by cross-correlating signals of the same type. For this purpose, we used a conventional 12-lead ECG device, Schwarzer Cardiotek GmbH; and an EASI device, Schwarzer Cardiotek GmbH. All instruments were made available by the company CRS medical GmbH. Both devices were simultaneously connected to an informed, healthy volunteer and signals were recorded under resting conditions. Crosscorrelation functions were calculated and analysed by using Matlab R2015a between the same original and filtered signal types, e.g. conventional and EASI lead I. Time lags between the recordings were compensated adequately. All signals, up to two conventional signals, were of high quality. We found a high degree of correlations between 10 of 12 leads (r > 0.9). However, the conventional recording system is more sensible to artifacts, muscle activities and noise, very likely due to its more complex electrode configuration and larger electrical sensing area. A visual inspection of the conventional and EASI time courses by an expert also indicated that EASI is useful in clinical practice. We compared a conventional 12-lead ECG with an EASI ECG by signal correlations. The results indicate that EASI is well suited for cardiologic routine: simplified electrode placement and reasonable signal quality. However, additional investigations are required, especially to test EASI for diagnostic purposes and with more sophisticated statistical methods.

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