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Study of the Impact of the Patient Rhythm during Cryoballoon Ablation on the Acute Biophysical Parameters

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World Journal of Cardiovascular Diseases 2022年第1期12卷 65-76页

作者： Mohamed Sanhoury Gaetano Fassini Salvatore Pala Massimo Moltrasio Fabrizio Tundo Stefania Riva Antonio Dello Russo Michela Casella claudio tondo Cardiac Arrhythmia Research Centre Department of Cardiovascular Sciences University of Milan Centro Cardiologico Monzino IRCCS Milan Italy Electrophysiology Unit Department of Cardiology and Angiology University of Alexandria Alexandria Egypt

Background: Pulmonary vein isolation by means of cryoballoon is a well-established way of treatment of atrial fibrillation. The aim of the study was to compare the acute cryoballoon biophysical parameters attained during energy applications to the individual pulmonary vein during sinus rhythm versus atrial fibrillation. Methods: 100 Patients who underwent their first-time PVI using second-generation cryoballoon for symptomatic and drug-refractory AF, between the beginning of March to end of August 2016, were initially screened. 61 patients with paroxysmal AF were included in the present study. 39 patients with persistent AF were excluded. No pre-procedural anatomical imaging was reported. Results: A total of 61 patients (male 80%, age 59.3 ± 13.4 years) were included in the present analysis.

Electrical storm in systemic sclerosis: Inside the electroanatomic substrate

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World Journal of Cardiology 2014年第10期6卷 1127-1130页

作者： Michela Casella Corrado Carbucicchio Eleonora Russo Francesca Pizzamiglio Paolo Golia Sergio Conti Fabrizio Costa Antonio Dello Russo claudio tondo Francesca Pizzamiglio Sergio Conti Antonio Dello Russo Claudio Tondo Cardiac Arrhythmia Research Centre Centro Cardiologico Monzino IRCCS 20138 Milan Italy Department of Cardiovascular Disease Morgagni-Pierantoni Hospital 27121 Forlì Italy Biosense-Webster 00040 Pomezia Italy

We report the case of a 63-year-old woman affected by a severe form of systemic scleroderma with pul-monary involvement(interstitial fibrosis diagnosed by biopsy and moderate pulmonary hypertension) and cardiac involvement(paroxysmal atrial fibrillation, right atrial flutter treated by catheter ablation, ventricular tachyarrhythmias, previous dual chamber implantable cardioverter defibrillator implant). Because of recurrent electrical storms refractory to iv antiarrhythmic drugs the patient was referred to our institution to undergo catheter ablation. During electrophysiological proce-dure a 3D shell of cardiac anatomy was created with intracardiac echocardiography pointing out a significant right ventricular dilatation with a complex aneurysmal lesion characterized by thin walls and irregular multiple trabeculae. A substrate-guided strategy of catheter ab-lation was accomplished leading to a complete electri-cal isolation of the aneurism and to the abolishment of all abnormal electrical activities. The use of advanced strategies of imaging together with electroanatomical mapping added important information to the complex arrhythmogenic substrate and improved efficacy and safety.

关键词： Ventricular tachycardia Electrical storm Radiofrequency catheter ablation Systemic sclerosis

Manifold benefits of choosing a minimally fluoroscopic catheter ablation approach

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World Journal of Cardiology 2013年第2期5卷 8-11页

作者： Michela Casella Antonio Dello Russo Gaetano Fassini Daniele Andreini Pasquale De Iuliis Saima Mushtaq Stefano Bartoletti Stefania Riva claudio tondo Cardiac Arrhythmia Research Centre Centro Cardiologico Monzino IRCCS Cardiovascular Imaging Department Centro Cardiologico Monzino IRCCS St Jude Medical Italy

We report the case of a 14-year-old boy with ventricular preexcitation. A standard, fluoroscopy guided, ablation procedure was successfully performed in a postero-midseptal region with a total fluoroscopy time of about 45 min (2430 ***2). A few hours after the procedure, preexcitation reappeared. A second ablation procedure was scheduled using the EnSite NavXTM mapping system. During mapping along the tricuspid groove, preexcitation suddenly disappeared due to mechanical "bumping" of the accessory pathway and it did not recover over the next 30 min. As per our routine practice, the phase of geometry reconstruction has been continuously recorded by the system; thus, an off-line analysis allowed to pinpoint the site of earliest activation and the site of mechanical bumping, where radiofrequency obtained the accessory pathway ablation. The second procedure was performed without using fluoroscopy at all. Thanks to the geometry reconstruction, the procedure was completely successful thus avoiding a further rehospitalization.

关键词： Supraventricular arrhythmias Accessory pathway Radiofrequency ablation Electroanatomical mapping Radiation exposure

Collateral findings during computed tomography scan for atrial fibrillation ablation:Let's take a look around

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World Journal of Cardiology 2016年第4期8卷 310-316页

作者： Francesco Perna Michela Casella Maria Lucia Narducci Antonio Dello Russo Gianluigi Bencardino Gianluca Pontone Gemma Pelargonio Daniele Andreini Nicola Vitulano Francesca Pizzamiglio Edoardo Conte Filippo Crea claudio tondo Cardiac Arrhythmia Unit Agostino Gemelli University Hospital Cardiac Arrhythmia Research Centre Centro Cardiologico MonzinoIRCCS

The growing number of atrial fibrillation catheter ablation procedures warranted the development of advanced cardiac mapping techniques, such as image integration between electroanatomical map and cardiac computed tomography. While scanning the chest before catheter ablation, it is frequent to detect cardiac and extracardiac collateral findings. Most collateral findings are promptly recognized as benign and do not require further attention. However, sometimes clinically relevant collateral findings are detected, which often warrant extra diagnostic examinations or even invasive procedure, and sometimes need to be followed-up over time. Even though reporting and further investigating collateral findings has not shown a clear survival benefit, almost all the working groups providing data on collateral findings reported some collateral findings eventually coming out to be malignancies, sometimes at an early stage. Therefore, there is currently no clear agreement about the right strategy to be followed.

关键词： Collateral findings Incidental findings Incidentalomas Cardiac computed tomography Image integration

Electrical storm: A clinical and electrophysiological overview

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World Journal of Cardiology 2015年第9期7卷 555-561页

作者： Sergio Conti Salvatore Pala Viviana Biagioli Giuseppe Del Giorno Martina Zucchetti Eleonora Russo Vittoria Marino Antonio Dello Russo Michela Casella Francesca Pizzamiglio Valentina Catto claudio tondo Corrado Carbucicchio Cardiac Arrhythmia Research Centre Centro Cardiologico Monzino IRCCS

Electrical storm(ES) is a clinical condition characterized by three or more ventricular arrhythmia episodes leading to appropriate implantable cardioverterdefibrillator(ICD) therapies in a 24 h period. Mostly, arrhythmias responsible of ES are multiple morphologies of monomorphic ventricular tachycardia(VT), but polymorphic VT and ventricular fibrillation can also result in ES. Clinical presentation is very dramatic in most cases, strictly related to the cardiac disease that may worsen electrical and hemodynamic decompensation. Therefore ES management is challenging in the majority of cases and a high mortality is the rule both in the acute and in the long-term phases. Different underlying cardiomyopathies provide significant clues into the mechanism of ES, which can arise in the setting of structural arrhythmogenic cardiomyopathies or rarely in patients with inherited arrhythmic syndrome, impacting on pharmacological treatment, on ICD programming, and on the opportunity to apply strategies of catheter ablation. This latter has become a pivotal form of treatment due to its high efficacy in modifying the arrhythmogenic substrate and in achieving rhythm stability, aiming at reducing recurrences of ventricular arrhythmia and at improving overall survival. In this review, the most relevant epidemiological and clinical aspects of ES, with regard to the acute and long-term follow-up implications, were evaluated, focusing on these novel therapeutic strategies of treatment.

关键词： Electrical storm Ventricular tachycardia/ fibrilla

Interleukin 1βreceptor and synaptic dysfunction in recurrent brain infection with Herpes simplex virus type-1

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Neural Regeneration Research 2025年第2期20卷 416-423页

作者： Roberto Piacentini claudio Grassi Department of Neuroscience UniversitàCattolica del Sacro CuoreRomeItaly Fondazione Policlinico Universitario A.Gemelli IRCCSRomeItaly

Several experimental evidence suggests a link between brain Herpes simplex virus type-1 infection and the occurrence of Alzheimer’s ***,the molecular mechanisms underlying this association are not completely *** the molecular mediators of synaptic and cognitive dysfunction occurring after Herpes simplex virus type-1 infection and reactivation in the brain neuroinflammatory cytokines seem to occupy a central ***,we specifically reviewed literature reports dealing with the impact of neuroinflammation on synaptic dysfunction observed after recurrent Herpes simplex virus type-1 reactivation in the brain,highlighting the role of interleukins and,in particular,interleukin 1βas a possible target against Herpes simplex virus type-1-induced neuronal dysfunctions.

关键词： herpes simplex virus type 1 interleukin 1β microglia neuroinflammation synaptic dysfunction

Proteostasis failure:at the intersection between aging and Alzheimer's disease

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Neural Regeneration Research 2025年第11期20卷 3221-3222页

作者： Natalia Poblete claudio Hetz Center for Geroscience Brain Health and MetabolismSantiagoChile Biomedical Neuroscience Institute Faculty of MedicineUniversity of ChileSantiagoChile Program of Cellular and Molecular Biology Institute of Biomedical SciencesFaculty of MedicineUniversity of ChileSantiagoChile Buck Institute for Research on Aging NovatoCAUSA

Lifestyle and demographics of the world's population are causing serious health problems impacting the brain,increasing the incidence of Alzheimer's disease(AD)and other types of *** we have gained important insights into the pathogenic mechanisms of AD,only palliative care is available to *** is characterized by the abnormal deposition of protein aggregates in the brain formed by amyloid β and hyper-phosphorylated,Tau in addition to neuroinflammation.

关键词： Alzheimer amyloid stasis

Localization and shock waves in curved manifolds

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Science Bulletin 2016年第7期61卷 570-575页

作者： claudio Conti Institute for Complex Systems National Research Council(ISC-CNR)Via dei Taurini 1900185 Rome ITItaly Department of Physics University SapienzaPiazzale AldoMoro 500185 Rome ITItaly

The investigation of the interplay between geometry and nonlinearity may open the road to the control of extreme waves. We study three-dimensional localization and dispersive shocks in a bent cigar shaped potential by the nonlinear Schro¨ dinger equation. At high bending and high nonlinearity, topological trapping is frustrated by the generation of curved wave-breaking. Four-dimensional parallel simulations confirm the theoretical model. This work may contribute to novel devices based on geometrically constrained highly nonlinear dynamics and tests and analogs of fundamental physical theories in curved space.

关键词： Nonlinear waves Shock wavesNonlinear optics Curvature Bose-Einsteincondensation

Linear and Nonlinear Anderson Localization in a Curved Potential

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Chinese Physics Letters 2014年第3期31卷 27-29页

作者： claudio Conti Department of Physics University Sapienza Piazzale Aldo Moro 5 Rome 00185 Italy

Disorder induced localization in the presence of nonlinearity and curvature is investigated. The time-resolved three-dimensional expansion of a wave packet in a bent cigar shaped potential with a focusing Kerr-like interaction term and Gaussian disorder is numerically analyzed. A self-consistent analytical theory, in which randomness, nonlinearity and geometry are determined by a single scaling parameter, is reported, and it is shown that curvature enhances localization.

关键词： WAVE packets RESEARCH NONLINEAR theories CURVATURE LOCALIZATION (Mathematics) PHYSICS research