scholarly journals Non-invasive electrophysiological cardiac mapping from development to practice

2020 ◽  
Vol 24 (4) ◽  
pp. 33
Author(s):  
E. A. Artyukhina ◽  
M. V. Yashkov ◽  
A. Sh. Revishvili
Keyword(s):  
Real Time ◽  
Conflict Of Interest ◽  
Diagnostic Method ◽  
Cardiac Mapping ◽  
Russian Science ◽  
Non Invasive ◽  
Preoperative Stage ◽  
Optimal Technology ◽  
History Of ◽  
Mapping Systems

<p>In modern interventional arrhythmology, invasive endocardial mapping systems can eliminate arrhythmias with a high degree of efficiency. However, invasive mapping systems have several disadvantages, such as: the invasiveness of the method, which requires some preparation and has a number of limitations; the impossibility of simultaneous determination of electrophysiological processes occurring throughout the heart; the complexity of mapping when the arrhythmia focus is located in hard-to-reach anatomical structures; localization of the focus on the epicardial surface of the heart and occasional and difficult-to-induce arrhythmias during surgery.<br />In clinical practice, it became necessary to develop and implement systems for superficial non-invasive electrophysiological mapping of the heart. The main difference between superficial non-invasive electrophysiological mapping of the heart and other techniques is that after processing all the information, it is possible to receive a holistic picture of electrophysiological processes occurring throughout the heart in real time instead of receiving separately recorded signals and information from several chambers of the heart.<br />In this article, we describe the history of the development and implementation of superficial non-invasive electrophysiological cardiac mapping and the potential use of the diagnostic method in treating the various types of arrhythmias. A brief technique of carrying out this diagnostic method is described. Further directions regarding the development and improvement of this research method are also discussed, such as developing and improving the system for visualizing heart processes occurring in real time, improving the treatment of patients with cardiac arrhythmias, introducing non-invasive mapping of heart data into the systems used for invasive electroanatomical mapping of the heart and integrating the method with systems for non-invasive ablation.<br />The non-invasive mapping system of the heart is a modern progressive and constantly evolving diagnostic method that enables visualizing the electrophysiological processes occurring in the human heart with high accuracy in a non-invasive manner. To determine tactics of treatment, decide on an interventional approach and select the optimal technology at the preoperative stage for treating patients with various rhythm disturbances in their hearts.</p><p>Received 19 November 2020 г. Revised 9 December 2020 г. Accepted 14 December 2020 г.</p><p><strong>Funding:</strong> The work is supported by a grant of the Russian Science Foundation (project No. 19-15-00406).</p><p><strong>Conflict of interest:</strong> Authors declare no conflict of interest.</p>

INVESTIGATION OF HAND KINEMATICS TOWARDS FRONT CRAWL SWIMMING USING NON-INVASIVE REAL-TIME MONITORING SYSTEM

2014 ◽  
Author(s):  
Rozaimi Ghazali ◽  
◽  
Asiah Mohd Pilus ◽  
Wan Mohd Bukhari Wan Daud ◽  
Mohd Juzaila Abd Latif ◽  
...  
Keyword(s):  
Real Time ◽  
Monitoring System ◽  
Real Time Monitoring ◽  
Front Crawl ◽  
Non Invasive ◽  
Hand Kinematics

Cardiac Mapping Systems

2007 ◽  
pp. 361-369 ◽  
Author(s):  
Nicholas D. Skadsberg ◽  
Timothy G. Laske ◽  
Paul A. Iaizzo
Keyword(s):  
Cardiac Mapping ◽  
Mapping Systems

scholarly journals Architectural ruins: geoculture of the anatomy of buildings as illustrated by Casa Ippolito, Malta

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Lino Bianco
Keyword(s):  
Material Culture ◽  
Building Materials ◽  
Raw Materials ◽  
Primary Source ◽  
Secondary Sources ◽  
Non Invasive ◽  
History Of ◽  
Aerial Vehicle ◽  
Materials Used ◽  
Building Physics

AbstractRuins are a statement on the building materials used and the construction method employed. Casa Ippolito, now in ruins, is typical of 17th-century Maltese aristocratic country residences. It represents an illustration of secondary or anthropogenic geodiversity. This paper scrutinises these ruins as a primary source in reconstructing the building’s architecture. The methodology involved on-site geographical surveying, including visual inspection and non-invasive tests, a geological survey of the local lithostratigraphy, and examination of notarial deeds and secondary sources to support findings about the building’s history as read from its ruins. An unmanned aerial vehicle was used to digitally record the parlous state of the architectural structure and karsten tubes were used to quantify the surface porosity of the limestone. The results are expressed from four perspectives. The anatomy of Casa Ippolito, as revealed in its ruins, provides a cross-section of its building history and shows two distinct phases in its construction. The tissue of Casa Ippolito—the building elements and materials—speaks of the knowledge of raw materials and their properties among the builders who worked on both phases. The architectural history of Casa Ippolito reveals how it supported its inhabitants’ wellbeing in terms of shelter, water and food. Finally, the ruins in their present state bring to the fore the site’s potential for cultural tourism. This case study aims to show that such ruins are not just geocultural remains of historical built fabric. They are open wounds in the built structure; they underpin the anatomy of the building and support insights into its former dynamics. Ruins offer an essay in material culture and building physics. Architectural ruins of masonry structures are anthropogenic discourse rendered in stone which facilitate not only the reconstruction of spaces but also places for human users; they are a statement on the wellbeing of humanity throughout history.

scholarly journals Increasing Electric Vehicles Reliability by Non-Invasive Diagnosis of Motor Winding Faults

Energies ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2510
Author(s):  
Konrad Górny ◽  
Piotr Kuwałek ◽  
Wojciech Pietrowski
Keyword(s):  
Electric Vehicles ◽  
Diagnostic Method ◽  
Induction Motors ◽  
Early Stage ◽  
Short Circuit ◽  
Damage Classification ◽  
Non Invasive ◽  
Signal Features ◽  
Empirical Wavelet Transform ◽  
Simulation Results

The article proposes a proprietary approach to the diagnosis of induction motors allowing increasing the reliability of electric vehicles. This approach makes it possible to detect damage in the form of an inter-turn short-circuit at an early stage of its occurrence. The authors of the article describe an effective diagnostic method using the extraction of diagnostic signal features using an Enhanced Empirical Wavelet Transform and an algorithm based on the method of Ensemble Bagged Trees. The article describes in detail the methodology of the carried out research, presents the method of extracting features from the diagnostic signal and describes the conclusions resulting from the research. Phase current waveforms obtained from a real object as well as simulation results based on the field-circuit model of an induction motor were used as a diagnostic signal in the research. In order to determine the accuracy of the damage classification, simple metrics such as accuracy, sensitivity, selectivity, precision as well as complex metrics weight F1 and macro F1 were used.

scholarly journals Serial Ultrasonographic and Real-Time Elastosonographic Assessment of the Ovine Common Calcaneal Tendon, after an Experimentally Induced Tendinopathy

2021 ◽  
Vol 8 (4) ◽  
pp. 54
Author(s):  
Daniele Serrani ◽  
Antonella Volta ◽  
Franco Cingolani ◽  
Luca Pennasilico ◽  
Caterina Di Bella ◽  
...  
Keyword(s):  
Real Time ◽  
Statistical Significance ◽  
Healing Process ◽  
Tendon Healing ◽  
Tissue Elasticity ◽  
Calcaneal Tendon ◽  
Non Invasive ◽  
Type Ia ◽  
Single Operator ◽  
Experimentally Induced

Real-time elastosonography (RTE) is a recently described, non-invasive, ultrasonographic technique developed to assess tissue elasticity. The main aim of this study was to investigate the ultrasonographic and elastosonographic appearance of the common calcaneal tendon (CCT) in an ovine model, and to monitor the progression of tendon healing after an experimentally-induced tendinopathy. Sound tendons were initially evaluated (T0) with a caliper and by a single operator with ultrasound. Ultrasonographic and elastosonographic images were then acquired. Subsequently, ultrasound-guided tendon lesions were induced by injecting 500 IU of Type IA collagenases proximally to the calcaneal tuberosity. Caliper measurement, ultrasonography and elastosonography were then repeated at 15 (T1), 30 (T2) and 60 (T3) days. Clinically measured width of the tendon, ultrasonographic thickness and width and percentage of hard (Elx-t%hrd) and soft (Elx-t%sft) tissue were recorded. Statistical analysis was performed on the data collected; statistical significance was set at p < 0.05. Intra-class correlation coefficient (ICC) revealed good (0.68) repeatability of elastosonographic evaluation of the CCT. The tendon width was significantly increased when comparing T0 with T1–2 and decreased when comparing T1–2 with T3. Ultrasound-assessed thickness was significantly increased between T0–T1 and decreased between T1-T2–3. Elx-t%hrd was significantly decreased at T1–2–3 and Elx-t%sft was significantly increased at T1–2–3. In conclusion, the ovine CCT is a highly stiff structure that undergoes a severe loss of stiffness during the healing process. Thickness and width of the tendon increased during the first 30 days and then reduced progressively along the subsequent 30 days. Ultrasonographic appearance of the tendon remained severely abnormal and the tendon showed severely reduced elastic proprieties 60 days after lesion induction.

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