Zobrazeno 1 - 10
of 124
pro vyhledávání: '"Alfonsas, Vainoras"'
Autor:
Naseha Wafa Qammar, Alfonsas Vainoras, Zenonas Navickas, Gediminas Jaruševičius, Minvydas Ragulskis
Publikováno v:
Applied Sciences, Vol 14, Iss 14, p 6191 (2024)
This study presents three different matrix architectures for the analysis of ECG parameters, aimed at detecting atrial fibrillation episodes. The evaluation involves a cohort of 15 individuals, utilizing these matrix architectures across various orde
Externí odkaz:
https://doaj.org/article/d11b5c6976ce4bb4b28fbc42f9d68fb6
Autor:
Naseha Wafa Qammar, Minvydas Ragulskis, Loreta Saunoriene, Rasa Smidtaite, Alfonsas Vainoras, Gediminas Jaruševičius
Publikováno v:
Diagnostics, Vol 14, Iss 13, p 1410 (2024)
The dynamics of the collapse of complexity observable in the performance of the cardiovascular system during the stress test is investigated in this paper. For this purpose, the interplay between the RR and JT cardiac intervals is measured and assess
Externí odkaz:
https://doaj.org/article/19407a86104949c49f730fd80ad0ad64
Autor:
Ugnė Orinaitė, Darius Petronaitis, Arvydas Jokimaitis, Mantas Landauskas, Minvydas Ragulskis, Alfonsas Vainoras, Rollin McCarty, Mike Atkinson, Nachum Plonka
Publikováno v:
Applied Sciences, Vol 14, Iss 8, p 3332 (2024)
The main scientific result of this paper is the demonstration of the fact that tidal effects induced by the Moon affect the Schumann resonance amplitudes measured at magnetometers located at different geographical locations of the Global Coherence Mo
Externí odkaz:
https://doaj.org/article/23418df96e7d4dba8e8dae878104e659
Autor:
Naseha Wafa Qammar, Darius Petronaitis, Arvydas Jokimaitis, Minvydas Ragulskis, Vilmantas Smalinskas, Greta Žiubrytė, Gediminas Jaruševičius, Alfonsas Vainoras, Rollin McCraty
Publikováno v:
Atmosphere, Vol 14, Iss 8, p 1234 (2023)
A substantial body of research has demonstrated the relationships between cardiac arrhythmias and geomagnetic activity. In this work, the idea is centered on finding the relationship between the local magnetic field (LMF) and acute myocardial infarct
Externí odkaz:
https://doaj.org/article/93027835687144caa66682677f734da0
Autor:
Naseha Wafa Qammar, Vaiva Šiaučiūnaitė, Vytautas Zabiela, Alfonsas Vainoras, Minvydas Ragulskis
Publikováno v:
Diagnostics, Vol 12, Iss 12, p 2919 (2022)
In this study, the notion of perfect matrices of Lagrange differences is employed to detect atrial fibrillation episodes based on three ECG parameters (JT interval, QRS interval, RR interval). The case study comprised 8 healthy individuals and 7 unhe
Externí odkaz:
https://doaj.org/article/02944f02ded44ec1a452ec90e5eea4e8
Autor:
Naseha Wafa Qammar, Ugnė Orinaitė, Vaiva Šiaučiūnaitė, Alfonsas Vainoras, Gintarė Šakalytė, Minvydas Ragulskis
Publikováno v:
Diagnostics, Vol 12, Iss 5, p 1256 (2022)
In this study, two categories of persons with normal and high ABP are subjected to the bicycle stress test (9 persons with normal ABP and 10 persons with high ABP). All persons are physically active men but not professional sportsmen. The mean and th
Externí odkaz:
https://doaj.org/article/d18ebef0285f432bac42cac8779b92ca
Publikováno v:
Baltic Journal of Sport and Health Sciences, Vol 4, Iss 115 (2020)
Background. Different methods are used to study cardiovascular parameters. Of these, heart rate variability (HRV) is a relevant marker for both athletes and physically active people. With regards to physical activity, yoga has become a popular form o
Externí odkaz:
https://doaj.org/article/0a19a65cdbe54761b57e73a43049a215
Publikováno v:
Diagnostics, Vol 11, Iss 12, p 2190 (2021)
The analysis of human physiological systems from the point of view of complex systems theory remains a very ambitious task. The complexity of the problem often encourages the use of innovative mathematical methods analyzing the processes that take pl
Externí odkaz:
https://doaj.org/article/303609be59e34b98affad8862eb3a1ce
Autor:
Loreta Saunoriene, Vaiva Siauciunaite, Alfonsas Vainoras, Virginija Bertasiute, Zenonas Navickas, Minvydas Ragulskis
Publikováno v:
PLoS ONE, Vol 14, Iss 5, p e0216938 (2019)
This paper aims to develop a novel computational technique for the detection of the transit through the anaerobic threshold. This technique uses only cardiac intervals derived from the electrocardiogram and is based on algebraic relationships between
Externí odkaz:
https://doaj.org/article/7c3f340cc29849fc826252fa1c4444d2
Detection of Ischemic Episodes Based on Two Consecutive Declines in the JT/ST Algebraic Relationship
Publikováno v:
Applied Sciences, Vol 11, Iss 11, p 4805 (2021)
The main objective of this paper is to explore if the JT/ST algebraic relationship could be helpful for the identification of ischemic changes in the human cardiovascular system. The suggested visualization technique highlights the specifics of compl
Externí odkaz:
https://doaj.org/article/1e6e097e6a9948f786f3fe64fd7f1e2d