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Your search keyword '"Luca Quarta"' showing total 3 results
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3 results on '"Luca Quarta"'

1. Intracoronary Pacing during 'Chimney Technique' in Transcatheter Aortic Valve-in-Valve Implantation: An Alternative Temporary Rapid Ventricular Stimulation?

Author

Alessandro Cafaro, Francesco Rizzo, Dionigi Fischetti, Luca Quarta, Marco Mussardo, Alessandro Mandurino-Mirizzi, Antonio Tondo, Marco Matteo Ciccone, Fortunato Iacovelli, and Giuseppe Colonna

Subjects
transcatheter aortic valve implantation, valve-in-valve, chimney technique, coronary artery occlusion, intracoronary pacing, Diseases of the circulatory (Cardiovascular) system, RC666-701
Abstract

Temporary rapid ventricular pacing (TRVP) is required during transcatheter aortic valve implantation (TAVI) in order to reduce cardiac output and to facilitate balloon aortic valvuloplasty, prosthesis deployment, and post-deployment balloon dilation. The two most frequently used TRVP techniques are right endocardial (RE)-TRVP and retrograde left endocardial temporary rapid ventricular pacing (RLE)-TRVP. The first one could be responsible for cardiac tamponade, one of the most serious procedural complications during TAVI, while the second one could often be unsuccessful. Intracoronary (IC)-TRVP through a coronary guidewire has been described as a safe and efficient procedure that could avoid such complications. We describe two clinical cases in which IC-TRVP has been effectively used during valve-in-valve TAVI with coronary protection via the “chimney technique”, after unsuccessful RLE-TRVP.

Published
2023
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2. Electrical coupling of mammalian neurons to microelectrodes with 3D nanoprotrusions

Author

Luca Berdondini, Luigi Martiradonna, Luca Quarta, Alessandro Simi, Massimo De Vittorio, Leonardo Sileo, Alessandro Maccione, Ferruccio Pisanello, Leonardo, Sileo, Ferruccio, Pisanello, Luca, Quarta, Alessandro, Maccione, Alessandro, Simi, Luca, Berdondini, DE VITTORIO, Massimo, and Luigi, Martiradonna

Subjects
CMOS sensor, Materials science, Beam induced deposition, Ion beam, Sem analysis, Neurophysiology, Nanotechnology, Condensed Matter Physics, Atomic and Molecular Physics, and Optics, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Coupling (electronics), Microelectrode, Signal quality, Electrode, Electrical and Electronic Engineering, Cultured neuronal network, Cell engulfment
Abstract

Ion Beam Induced Deposition (IBID) is employed to fabricate three-dimensional nanoprotrusions on top of the recording pads of an active pixel sensor array (APS-MEA) featuring 4096 microelectrodes. Modified APS-MEAs are envisioned as enhanced tools to achieve real-time ''in-cell'' recordings from thousands of sensing elements, thus aiming to large-scale in-vitro registrations with unprecedented signal quality. A generalized electric model is proposed to address the revealed complexity of the neuron/electrode interface, and simulations have been conducted revealing the most advantageous cell/electrode coupling conditions. Preliminary results on the recording of spontaneous activity in cultured neuronal networks by means of nanostructured microelectrodes demonstrate the compatibility of IBID technology and APSMEA infrastructure. The interface between cultured mammalian neurons and modified microelectrodes is revealed by FIB/SEM analysis, fostering the employment of the proposed electrical model for interpretation of electrical recordings from nanostructured microelectrodes. ©2013 Elsevier B.V. All rights reserved.

Published
2013

3. Beam induced deposition of 3D electrodes to improve coupling to cells

Author

Alessandro Simi, Massimo De Vittorio, Alice Scarpellini, Leonardo Sileo, Luca Berdondini, Alessandro Maccione, Luca Quarta, Silvia Dante, Andreas Schertel, Luigi Martiradonna, Luigi, Martiradonna, Luca, Quarta, Leonardo, Sileo, Andreas, Schertel, Alessandro, Maccione, Alessandro, Simi, Silvia, Dante, Alice, Scarpellini, Luca, Berdondini, and DE VITTORIO, Massimo

Subjects
Fabrication, Nanostructure, Materials science, Ion beam, Scanning electron microscope, business.industry, Nanotechnology, Adhesion, Condensed Matter Physics, Atomic and Molecular Physics, and Optics, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Coupling (electronics), Electrode, Optoelectronics, Electrical and Electronic Engineering, business, Beam (structure)
Abstract

The fabrication of three-dimensional platinum nanoprotrusions by ion beam induced deposition (IBID) is here proposed to study their interaction with cultured rat primary neurons. The broad versatility of IBID allows to test the effects on cells network morphology of different protrusions shapes, from straight pillars to nail-headed or sphere-headed vertical structures. A preferential adhesion of cells on fabricated Pt nanostructures is clearly shown by fluorescence and scanning electron microscopy, with dense and suspended neuritic networks observed on arrays of large-headed pillars. This technique could be exploited to improve cells/electrodes adhesion and to increase the detected extracellular electric signal.

Published
2012

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