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Karstic morphology in northern Sinus Meridiani, Mars
Davide Baioni,Alessio Murana,Nadja Zupan Hajna 한국지질과학협의회 2014 Geosciences Journal Vol.18 No.3
This work describes karst landforms observed inthe northern Sinus Meridiani region located between 1°18'N to2°30'N latitude and 2°30'W to 0°13'W longitude, which coversapproximately 9,100 square kilometres, characterized by spectralsignatures of evaporite minerals. An integrated analysis of theReconnaissance Orbiter (MRO) High Resolution Imaging ScienceExperiment (HiRISE), High Resolution Stereo Camera (HRSC),and Mars Orbiter Camera (MOC) imagery were used to performa morphological and morphometric investigation of the study area. Results resolved three specific morpho-units, characterized by differentdoline features, which displayed distinct types and degreesof karstification in the study area. The landforms indicated differentsolutional properties of the units, and suggested enough liquid waterin the recent past was present to form the karst landforms, emphasizingclimatic changes during the Amazonian period occurred inthe Sinus Meridiani area.
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Davide Pacini,Giacomo Murana,Alessandro Leone,Luca Di Marco,Antonio Pantaleo 대한흉부외과학회 2016 Journal of Chest Surgery (J Chest Surg) Vol.49 No.6
Doctors are often faced with difficult decisions and uncertainty when patients need a certain treatment. They routinely rely on the scientific literature, in addition to their knowledge, experience, and patient preferences. Clinical practice guidelines are created with the intention of facilitating decision-making. They may offer concise instructions for the diagnosis, management (medical or surgical treatments), and prevention of specific diseases o r conditions. All information included in t he f inal v ersion a re the r esult of a s ystematic rev iew of scientific articles and an assessment of the benefits and costs of alternative care options. The final document attempts to meet the needs of most patients in most circumstances and clinicians, aware of these recommendations, should always make individualized treatment decisions. In this review, we attempted to define the intent and applicability of clinical practice guidelines, expert consensus documents, and registry studies, focusing on the management of patients with thoracic aortic disease.
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Transcatheter Mitral Valve Implantation in Open Heart Surgery: An Off-Label Technique
Jacopo Alfonsi,Giacomo Murana,Anna Corsini,Carlo Savini,Roberto Di Bartolomeo,Davide Pacini 대한흉부외과학회 2017 Journal of Chest Surgery (J Chest Surg) Vol.50 No.6
Extensive mitral annulus calcifications are considered a contraindication for valve surgery. We describe the case of a 76-year-old female with severe mitral and aortic stenosis associated with extensive calcifications of the heart. The patient underwent an open mitroaortic valve replacement using transcatheter aortic valve implantation with an Edwards SAPIEN XT valve (Edwards Lifesciences Corp., Irvine, CA, USA) in the mitral position. T he a ortic valve was replaced u sing a s tentless v alve p rosthesis (LivaNova S OLO; L ivaNova PLC, London, UK). Postoperative echocardiography showed that the prosthetic valve was in the correct position and there were no paravalvular leaks. A bailout open transcatheter valve implantation can be considered a safe and effective option in selected cases with an extensively calcified mitral valve.
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Luca Di Marco,Antonio Pantaleo,Alessandro Leone,Giacomo Murana,Roberto Di Bartolomeo,Davide Pacini 대한흉부외과학회 2017 Journal of Chest Surgery (J Chest Surg) Vol.50 No.1
Complex lesions of the thoracic aorta are traditionally treated in 2 surgical steps with the elephant trunk technique. A relatively new approach is the frozen elephant trunk (FET) technique, which potentially allows combined lesions of the thoracic aorta to be treated in a 1-stage procedure combining endovascular treatment with conventional surgery using a hybrid prosthesis. These are very complex and time-consuming operations, and good results can be obtained only if appropriate strategies for myocardial, cerebral, and visceral protection are adopted. However, the FET technique is associated with a non-negligible incidence of spinal cord injury, due to the extensive coverage of the descending aorta with the excessive sacrifice of intercostal arteries. The indications for the FET technique include chronic thoracic aortic dissection, acute or chronic type B dissection when endovascular treatment is contraindicated, chronic aneurysm of the thoracic aorta, and chronic aneurysm of the distal arch. The FET technique is also indicated in acute type A a ortic dissection, especially when the tear is localized in the aortic arch; in cases of distal malperfusion; and in young patients. In light of the great interest in the FET technique, the Vascular Domain of the European Association for cardio-thoracic Surgery published a position paper reporting the current knowledge and the state of the art of the FET technique. Herein, we describe the surgical techniques involved in the FET technique and we report our experience with the FET technique for the treatment of complex aortic disease of the thoracic aorta.
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