Search results for "Flutter"
showing 10 items of 32 documents
Impact of atrial fibrillation/flutter on the in-hospital mortality of surgical patients – Results from the German nationwide cohort
2020
To investigate the impact of atrial fibrillation/flutter (AF) on adverse in-hospital outcomes in hospitalized surgical patients.The nationwide German inpatient sample of the years 2005-2018 was used for this analysis. Surgical patients were stratified by AF and compared. Logistic regression models were used to investigate the impact of AF on in-hospital outcomes.In total, 96,589,627 hospitalizations with surgery were included in the present analysis in Germany (2005-2018). Among these, 6,680,261 were additionally coded with AF (6.9%). In-hospital death rate was substantially higher in surgical patients with AF (6.3%) than without (1.1%). Proportion of surgical patients with AF increased fro…
Impact of atrial fibrillation/flutter on the in-hospital mortality of ischemic stroke patients.
2020
Stroke is the second leading cause of death worldwide. Ischemic strokes, which are caused by atrial fibrillation/flutter (AF), may be more devastating than those that occur without AF.The purpose of this study was to investigate the impact of AF on adverse events in hospitalized ischemic stroke patients and to estimate the elevated impact of AF on the occurrence of these adverse events.The nationwide German inpatient sample of the years 2005-2015 was used for this analysis. Ischemic stroke patients were identified by ICD code I63 and stratified by AF. Logistic regression models were used to investigate the impact of AF on adverse in-hospital events and adjusted for age, sex, and comorbiditi…
A method for quantifying atrial fibrillation organization based on wave-morphology similarity
2002
A new method for quantifying the organization of single bipolar electrograms recorded in the human atria during atrial fibrillation (AF) is presented. The algorithm relies on the comparison between pairs of local activation waves (LAWs) to estimate their morphological similarity, and returns a regularity index (/spl rho/) which measures the extent of repetitiveness over time of the detected activations. The database consisted of endocardial data from a multipolar basket catheter during AF and intraatrial recordings during atrial flutter. The index showed maximum regularity (/spl rho/=1) for all atrial flutter episodes and decreased significantly when increasing AF complexity as defined by W…
The supraventricular tachycardias: Proposal of a diagnostic algorithm for the narrow complex tachycardias
2013
AbstractThe narrow complex tachycardias (NCTs) are defined by the presence in a 12-lead electrocardiogram (ECG) of a QRS complex duration less than 120ms and a heart rate greater than 100 beats per minute; those are typically of supraventricular origin, although rarely narrow complex ventricular tachycardias have been reported in the literature.As some studies document, to diagnose correctly the NCTs is an arduous exercise because sometimes those have similar presentation on the ECG. In this paper, we have reviewed the physiopathological, clinical, and ECG findings of all known supraventricular tachycardias and, in order to reduce the possible diagnostic errors on the ECG, we have proposed …
A Teaching Experience: Aeroelasticity and the Finite Element Method
2015
[EN] The aeroelastic modelling of aircraft structures is a fundamental area for the students of Aerospace Engineering Degree. This subject has a strongly multidisciplinary character and involves other several subjects like mechanics, vibrations, aerodynamics, structural analysis. Consequently, the students find stimulating the challenge of merging their knowledge at different areas. In this paper, a teaching experience on the solution of the aeroelastic problem of a 3D-wing through six different computer tasks is presented. The main objective is to attempt a relatively complex problem using a simple version of the Finite Element Method with only four degrees of freedom. The students begin c…
WING FLUTTER SUPPRESSION ENHANCEMENT USING A WELL-SUITED ACTIVE CONTROL MODEL
2007
State-space theory is employed here to model a new active wing flutter suppression control. In this paper, the design of a flutter suppression control law, for the NASA Benchmark Active Control Technology wing, is proposed through a single input-single output controller and unsteady aerodynamics is modelled using the Theodorsen's theory. Wing dynamic model is obtained by combining the aeroelastic equations of motion with the actuator model presented. Open-loop dynamic behaviour is examined for a single feedback variable that combines pitch and plunge accelerations. Here, a new formulation of control law, based on classical control techniques and featuring two feedback closed-loops, is succ…
Effectiveness and safety of electrical cardioversion for acute-onset atrial fibrillation in the emergency department: a real-world 10-year single cen…
2019
OBJECTIVE Despite limited evidence, electrical cardioversion of acute-onset atrial fibrillation (AAF) is widely performed in the emergency department (ED). The aim of this study was to describe the effectiveness and safety of electrical cardioversion of AAF performed by emergency physicians in the ED. METHODS All episodes of AAF electrically cardioverted in the ED were retrieved from the database for a 10-year period. Most patients not already receiving anticoagulants were given enoxaparin before the procedure (259/419). Procedural complications were recorded, and the patients were followed-up for 30 days for cardiovascular and hemorrhagic complications. RESULTS Four hundred nineteen eligib…
Sludinājumu portāla mobilās aplikācijas izstrāde
2022
Darbā ir aprakstīts Flutter lietotnes “FastMarket” izstrādes process, kas sastāvēja no programmatūras dokumentācijas izstrādēs, projektējuma, kā arī pirmkoda izstrādes un testēšanas dokumentācijas izveidošanas un izpildes. “FastMarket” lietotne ļauj lietotājiem izveidot un publicēt savus sludinājumus kā arī atrast citu lietotāju publicētus sludinājumus un filtrēt tos pēc kategorijas. Viena no atšķirošam īpašībām ir čats, kas ļauj sazināties ar konkrēta sludinājuma īpašnieku tieši lietotnē, bez kādas ārējas lietotnes palīdzības. Lietotne tika izstrādāta ar Flutter ietvari, kas ļauj kompilēt to gan uz iOS, gan uz Android platformām, kā datubāze tika izmantots Firebase serviss.
Mobilās lietotnes "CrochetApp" moduļa "Instrumenti" izstrāde
2022
Kvalifikācijas darbs “Mobilās lietotnes "CrochetApp" moduļa "Instrumenti" izstrāde” apraksta lietotnes “CrochetApp” kopējo struktūru ar detalizētāku moduļa “Instrumenti” izstrādes procesa aprakstu. “CrochetApp” lietotnes mērķis ir atvieglot tamborēšanas procesu un padarīt to daudz patīkamāku. Savukārt, modulis “Instrumenti” paredz iespēju pārvaldīt savas darba rīku kolekcijas, kā arī piedāvā vairākas tamborēšanai orientētās funkcijas. Paša lietotne un modulis “Instrumenti” ir realizēti ar starpplatformas izstrādes tehnoloģijas – Flutter, palīdzību, kas ļauj vienlaicīgi un ar viena koda bāzi izstrādāt lietotnes gan uz Android, gan uz iOS. Izstrāde tika veikta Android Studio programmēšanas rī…
Mobilo lietotņu izstrāde ar Flutter un Android un iOS dabīgajām tehnoloģijām
2021
Viedtālruņu lietotāju skaitam strauji pieaugot, attiecīgi palielinās arī mobilo lietotņu piedāvājums. iOS un Android ir tapušas par nozīmīgākajām mobilo lietotņu platformām. Radīti starpplatformu ietvari, kas ir pievilcīgi gan izstrādātājiem, gan lietotņu īpašniekiem. Lietotnes plānotā funkcionalitāte un sarežģītība nosaka piemērotāko izstrādes tehnoloģiju. Bakalaura darba “Mobilo lietotņu izstrāde ar Flutter un Android un iOS dabīgajām tehnoloģijām” mērķis ir pētīt, izmantojot dažādas pētījumu metodes, un analizēt Flutter ietvara un iOS un Android dabīgo mobilo lietotņu izstrādes tehnoloģijas, vēsturi, logrīkus, arhitektūru un programmēšanas valodas, kā arī piedāvātās iespējas. Autore veic…