16 research outputs found
Epicardial, Biatrial Ablation With Integrated Uni-bipolar Radiofrequency Technology in Stand-alone Persistent Atrial Fibrillation
No full textAlthough minimally invasive approaches for surgical treatment of stand-alone atrial fibrillation have gained popularity for the past decade, ablation technology and extensive lesion sets play a major role in the achievement of a successful procedure, especially in presence of persistent and long-standing persistent atrial fibrillation. We evaluated clinical outcomes after totally endoscopic biatrial epicardial ablation of persistent atrial fibrillation with a novel integrated uni-bipolar radiofrequency device
Left ventricle reconstruction and heartmate3 implantation. The "double patch technique".
No full textBACKGROUND: HeartMate 3 is a left ventricular assist device, composed of a centrifugal pump. It can be applied as a myocardial recovery, a bridge to transplant, or a destination therapy, in the treatment of patients with left ventricular heart failure.
METHODS: Herein we describe a technique applied against a giant aneurysmal dilatation, which combines a surgical device implantation and a left ventricular reconstruction using a double patch.
RESULTS: The patch minimizes thrombotic risk thanks to its internal bovine pericardium layer, which is in contact with blood.
CONCLUSIONS: The outlined technique is relatively reproducible and safe in a selected group of patients, as it employs a high-quality device and enables the restoration of an appropriate ventricular geometry
Numerical Dispersion of Gravity Waves
No full textIn this work numerical dispersion relations for atmospheric gravity waves are experimentally analyzed using the anelastic mesoscale model METRAS. The dependency of the group velocity on grid size and advection scheme (central scheme (CDF) and methods based on the essentially non-oscillatory (ENO) method) is presented showing a retardation of the waves with coarser resolution. ENO can simulate smaller waves than CDF. When the grid spacing is discontinuous waves moving from the fine grid to the coarse grid are reflected due to numerical dispersion. A solution is presented to attenuate the reflected waves in order to avoid gravity waves being trapped within the domain of the fine grid. It is based on an internal sponge layer between coarse and fine grid with optimized damping coefficients depending on the local stratification. The method is successfully applied in an idealized two-dimensional test case with gravity waves of different wave lengths (relative to the resolution)
Unilateral versus bilateral cerebral perfusion during aortic surgery for acute type A aortic dissection: a multicentre study
No full textThe aim of this retrospective multicentre study was to investigate and compare clinical outcomes of unilateral and bilateral antegrade cerebral perfusion (ACP) strategies on cerebral protection during surgery for type A aortic dissection
Die räumliche Zusammensetzung des pollen-vemittelten Genflusses bei Traubeneiche
No full textThe evolutionary consequences of gene flow are determined by its genetic composition, that is, the relative contributions of gene sources from different spatial origins and scales. In the present study we investigated multiscale pollen-mediated gene flow in sessile oak (Quercus petraea(matt.) liebl.) across the fragmented landscape of northern Germany. application of the mesoscale meteorological transport model metras+Pollen allowed us to differentiate and quantify within-stand, regional and supra-regional pollen dispersal. The simulation results were compared to the results of microsatellite-based paternity reconstructions within and between 3 oak stands. Simulations with the population-genetic model ecoGene landscape evaluated the robustness of the gene flow results to different levels of fragmentation. Within-stand gene flow dominated the reproductive system (metras+Pollen: 55% - 87%; empirical: 75% - 80%). Regional pollen sources within a focus area of 5 km x 5 km centred on the stands contributed with 9% - 40% the largest fraction of immigrant pollen. Supra-regional gene flow amounted to 5%. This general partitioning of multiscale gene flow persisted if the area of oak forest in the studied landscape was increased from 15% to 25% (10% - 36% external gene flow). In addition, reproductive connectivity between stands was not disrupted, even if the extent of oak forests was reduced to 5% (4% - 14% external gene flow). The results show that fragmented stands of sessile oak within the main part of the species distribution range form a reproductive networ
Rapid-deployment aortic valve replacement in high-risk patients with severe endocarditis.
No full textSurgical management of aortic valve endocarditis in high risk patients is controversial and the ideal treatment has not been found yet. We describe a selected series of eight patients treated with rapid-deployment aortic valve prosthesis as a therapeutic solution for minimizing the risks associated with annulus manipulation in case of severe aortic infective endocarditis. Eight consecutive patients (five men and three women) with a mean age of 74.3 ± 7.2 years, mean logistic EuroSCORE II of 16.0 % ± 0.1 %, affected by aortic native (1 patient) , or prosthetic valve endocarditis (7 patients) , were treated with Edwards Intuity Elite implantation. Hemodynamic performance and infective data were collected pre-, intra-, and postoperatively with a mean follow-up of 2.7 ± 0.7 years. One case of in-hospital mortality was noted. None of the patients had any embolic or infective complication postoperatively. The cardiopulmonary bypass and aortic cross-clamp times were 148.4 ± 41.6 and 90.5 ± 25.3 min, respectively. The postoperative echocardiographic controls indicated a mean transvalvular gradient of 16.7 ± 3.0 mmHg and one case of paravalvular leaks (2 +). Two patients underwent epigastric permanent pacemaker implantation. During the follow- up, seven patients were alive, with no evidence of symptoms or recurrences of endocarditis or embolic episodes. No new paravalvular leaks were noted, and the mean gradient on the valves was 12.4 ± 3.4 mmHg. Rapid deployment aortic valve replacement in selected very high-risk patients affected by infective endocarditis could be a reasonable choice with acceptable results. However, further studies are needed to confirm these results
Early to mid-term results after total cavopulmonary connection performed in the second decade of life
No full textInnovations of how to teach rhythmic in an elementary school
No full textStraipsnyje nagrinėjamos ritmikos mokymo inovacijos pradinėje mokykloje, išryškinami tipologiniai trukminio (kvantitatyvinio) ir akcentinio (kvalitatyvinio) ritmo skirtumai, kvantitatyvinės ritmikos sklaida pasaulio kultūrų ir lietuvių etninėje muzikoje. Tyrimui pasitelkiami tipologinis, istorinis ir lyginamasis metodai, remiamasi muzikos psichologijos, komparatyvinės muzikologijos ir lietuvių etnomuzikologijos duomenimis. Taip pat aprašoma ir nagrinėjama originali autoriaus sukurta ritmikos mokymo metodika, aptariama kincstezinės ir verbalinės mnemomkos metodų svarba lavinant pradinukų ritmo pojūtį. Reikšminiai žodžiai: Kvantitatyvinė ir kvalitatyvinė ritmika; Metras; Pulsas; Ritmavimas; Ritmikos mokymas; Silabinė ir kinestezinė mnemonika; Trukmių santukiai; Trukmių santykiai; Durational relations; Measure; Quantitative and qualitative rhythms; Rhythm making; Rhythm teaching; Rhythmic pulsation; Rhytm making; Sylabic and kinesthetic mnemonics; Sylabie and kinesthetic mnemonicsThe article deals with innovations of rhythm learning in the primary school. The differences of quantitative and accentual (qualitative) rhythms and the spread of quantitative rhythms to the ethnic music of world's cultures are brought out. The research was done using typological, historical, and comparative methods and it was based on the data of music psychology, comparative musicology, and Lithuanian ethnomusicology. Also the paper dicusses and analyses the innovative method of teaching rhythms, proposed by the author, and the importance of the methods of kinesthetical and verbal mnemonics in the process of rhythm sense developmen
Šiaurės vakarų lietuvių ir pietvakarių latvių liaudies dainų muzikiniai ypatumai
No full textStraipsnyje nagrinėjamos Baltijos pajūryje gyvenančių dviejų tautų - šiaurės vakarų lietuvių ir pietvakarių latvių - liaudies dainų muzikinės savybes. Remiantis lietuvių ir latvių liaudies dainų rinkiniais, siekiama atskleisti sio regiono dainuojamosios tautosakos panašumus, bendrumus ir skirtumus. Taikant lyginamąjį ir muzikologinés analizės metodus, nustatomos abiejų tautų liaudies dainų melodikos derminės, ritminės, metrinės savybes, kadencijų sandara ir kt. Tyrinėjamos muzikiniu požiūriu turtingiausios ir žanriškai įvairiausios vestuvinių apeigų liaudies dainos. Reikšminiai žodžiai: Liaudies dainos; Lietuviai; Latviai; Dermė; Metras; Ritmas; Kadencija; Intonacija; Folk song; Lithuanians; Ltvians; Mode; Metre; Thythm; Cadence; IntonationMusical features of the folk songs of two nations living on the seashore of the Baltic - northwest Lithuanians and southwest Latvians - are being analyzed in the article. On the grounds of collections of Lithuanian and Latvian folk songs the author endeavors to unfold similarities, affinities and differences of the song folklore of the region. With the means of comparative method and the one of musicological analysis modal. rhythmical, metrical traits of the melodic of the folk songs of the both nations, structure of cadences etc. are being determined. Wedding folk songs that are the richest in the musical point of view and the most diverse in their genres are being researched
Hemostatic activation during cardiopulmonary bypass with different aprotinin dosages in pediatric patients having cardiac operations
No full text
