870 research outputs found
Percutaneous mitral valve commissurotomy
No full textTranscatheter therapies have progressively assumed a major role in the treatment of valve heart disease. The major drivers have been population ageing, the high prevalence of valve disease in the elderly, and the consequent need of less invasive treatments for this fragile patient population. While transcatheter aortic valve implantation (TAVI) has achieved a central role in the treatment of severe aortic stenosis across any surgical risk category, transcatheter treatment of mitral valve disease is still the object of intense debate and investigation. The reasons are that the mitral valve apparatus anatomy is more complex, involving valve leaflets, subvalvular apparatus and the left ventricle. Further, the most frequent mitral valve disease, i.e. mitral regurgitation, has different etiologies and is frequently a consequence rather than the cause of left ventricular dysfunction and heart failure. Hence, clinical efficacy of its correction is uncertain. Beyond the varying clinical scenarios, there are a miriad of devices under developement or at different stages of clinical investigations. This book describes the state of the art in the filed of percutaneous treatment of mitral valve disease. It provides a comprehensive review including anatomical basis, in-depth diagnostics, patophysiology, summary of available evidence for transcatheter treatments, state-of-the art of cardiac surgery,description of devices commercially available or under investigation, and clinical examples
Airbone remote sensing for archaeological application: prehistorical landscapes in Gargano area (Italy)
No full textThis paper illustrates some results of the
“National Research Project -PRIN, 2005”, devoted
to study both features of a prehistorical mining
landscape and underground mines - not evident, or
partially evident, on surface.
The geographical context of the project is the
Promontory of Gargano (South-Eastern Italy), where
the extraordinary availability of flint is associated
with evidence of numerous extraction complexes
(underground mines) (Galiberti 2005). According to
the available data, the mining activities cover a timespan
of almost three thousand years; among them,
the most important is practiced in the Defensola hill,
a mine- the most ancient in Europe- active from
roughly 5.800 b.C (Tarantini, 2006).
Differently from other European prehistoric mining
complexes, in the Gargano area, mines were
generally opened onto slopes with a convex morphology
and had often produced extremely large
conoidal heaps outside.
Digital aerial photogrammetry was used in order
to natural and archaeological features of recognize
the prehistorical landscape near thr mines. Starting
from present and historical geo-morphological evidences,
thanks to the stereo interpretation of aerial
photos that have shown earthworks and soilmarks,
it was possible to recognize geological features
interpreted as evidence of palaeodrainages and of
ancient coastline. The integration between historical
references and geological researches through a
GIS allowed to join different dataset, in order to
highlight the spatial and temporal variations, and to
produce thematic cartography
Introduction of Domestic Water Saving Systems in the Municipal Water Cycle: an LCA Based Comparison
No full textAs part of AQUASAVE project, funded by the European Union in the framework of the LIFE-ENVIRONMENT action, an assessment of the environmental sustainability of innovative techniques of water consumption reduction, rain water harvesting and grey water reuse in a residential building of Bologna has been recently initiated.The aim of AQUASAVE is to design and build an apartment house in Bologna, to demonstrate, trough the introduction of appropriate devices and technologies, the possibility to save up to 50% of drinking water. The idea is to use treated grey water for toilet flushing and rain water, after treatment and storage, in dishwashers and washing machines. Moreover, devices for reducing water consumption will be extensively adopted.The environmental benefits and burdens of introducing these systems in a residential building without changing the municipal wastewater treatment system will be evaluated by mean of an LCA analysis.In the first phase of the study an LCA of production and distribution of drinking water and of treatment of waste water of the entire Bologna municipality has been performed.This activity has been conducted in collaboration with Seabo, the municipal firm that has in charge the whole water cycle of the Bologna city.In the second phase the introduction of the proposed domestic systems will be evaluated.In this paper the preliminary results of the study will be presented
LCA of Drinking and Wastewater Treatment Systems of Bologna City
No full textAs part of AQUASAVE project, funded by the European Union in the framework of the LIFE-ENVIRONMENT action, an assessment of the environmental sustainability of innovative techniques of water consumption reduction, rain water harvesting and grey water reuse in a residential building of Bologna is in progress. A preliminary TEAMTMLCA model of the drinking and wastewater treatment systems of the Bologna metropolitan area (existing scenario) has been completed. Environmental impact assessment results confirm that the dominant process for the most important impact categories, except eutrophication, is the electric energy production. Anyway when interpreting the results, great importance shall be given to local effects related to ground water extraction such as the subsidence phenomenon and pollutants intrusion in water-bearing stratum
Life Cycle Assessment del sistema di produzione, distribuzione e trattamento delle acque del Comune di Bologna
No full textIn questo documento è riportato il testo del sommario della relazione su invito presentata alla giornata di studio 'Il risparmio e il riciclo dell'acqua nelle città - Per un uso sostenibile della risorsa idropotabile' tenutasi a Bologna, Palazzo d' Accursio il 23 Ottobre 1998. La giornata di studio si inquadra nell' attività ENEA di preparazione alla Conferenza Nazionale Energia e Ambiente. Il lavoro presentato riporta i risultati preliminari relativi all'analisi di Ciclo di Vita del sistema esistente di potabilizzazione e trattamento reflui del Comune di Bologna. Tale lavoro è stato finanziato dalla Comunità Europea nell' ambito del programma Life-Ambiente ed è stato commissionato alla Divisione ERG-SIEC dall' unità AMB-TEIN-DEP. In Allegato 1 sono inseriti le copie dei trasparenti presentati dall' Ing. Ferri nel corso della giornata di studio
LCA Application to Municiapl Drinking Water and Waste Water Treatment Systems
No full textDescrizione sintetica delle analisi di LCA eseguite all'interno del progetto AQUASAVE e discussione dei risultati
LCA of Drinking and Wastewater Treatment Systems of Bologna City: Final Results
No full textA pilot study to apply LCA methodology to domestic water cycle of Bologna city is in course of completion. The activity is being carried out within the AQUASAVE project, funded by a LIFE-ENVIRONMENT action of the European Union. The LCA study objective is to develop a model that will allow to compare the overall environmental impact of the 'existing scenario' of the drinking and wastewater treatment systems of Bologna metropolitan area to the 'innovative one' tested in AQUASAVE. The final TEAMTMLCA model of the existing scenario has been completed. In this paper the methodological approach, the limits and advantages of LCA methodology when applied to urban water cycle and the final results of the study are discussed
Transcatheter aortic valve replacement and chronic kidney disease: Close friends or sworn enemies?
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