Publications by authors named "Zaca V"

A 38-year-old man was admitted to our hospital after ventricular tachycardia. Endocardial bipolar and unipolar voltage mapping were performed and findings were integrated with data from intracardiac echocardiography (ICE) right ventricular (RV) speckle-tracking analysis. A reduction in the strain analysis was stored in correspondence of the fragmented electrogram area.

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Article Synopsis
  • Catheter ablation (CA) is an effective treatment for atrial flutter, and this study focused on enhancing CA for the cavotricuspid isthmus (CTI) using a zero-fluoroscopy (ZF) technique.
  • A total of 188 patients were divided into two groups: one used a standard catheter without shaft visualization (Group 1), while the other utilized a shaft visualization approach (Group 2).
  • The results indicated that the ZF method allowed for a complete CTI block with reduced radiofrequency duration and shorter procedure times in Group 2, demonstrating that shaft visualization aids in safer catheter manipulation and effective treatment outcomes.
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Aims: The aim of this study is to report heart failure hospitalization (HFH) rates and associated costs within 12 months following implantable cardioverter defibrillator (ICD)/cardiac resynchronization therapy defibrillator (CRT-D) device replacement or upgrade from ICD to CRT-D.

Methods And Results: The DEtect long-term COmplications after icD rEplacement (DECODE) was a prospective, single-arm, multicentre cohort study that explored complications in ICD/CRT-D recipients. All clinical and survival data at 12 months were prospectively analysed.

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Background: Oesophageal changes and injuries were recorded after atrial fibrillation(AF) ablation procedures. The reduction of power in the posterior left atrial(LA) wall(closest to the oesophagus) and the monitoring of temperature in the oesophagus(OE) reduced oesophageal injuries. The intracardiac-echocardiography(ICE) with a Cartosound module provides two-dimensional imaging (2D) to assess detailed cardiac anatomy and its relationship with the OE.

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Background: Few studies prospectively assessed risk factors for ventricular fibrillation (VF) during a first myocardial infarction (MI). We designed a nation-wide study aiming to identify clinical and genetic characteristics associated with primary VF; and report here about clinical features.

Methods: PREDESTINATION (PRimary vEntricular fibrillation and suDden dEath during a firST myocardIal iNfArcTION) is an Italian case-control, prospective multicentre study.

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Article Synopsis
  • * Out of 245 patients followed for about 63 months, those treated with implantable cardioverter-defibrillators (ICDs) showed a significantly lower risk of cardiovascular death compared to those on medication alone.
  • * Younger patients (aged 16 or younger) at the time of their first arrhythmia were found to be at a higher risk of experiencing arrhythmic recurrence, despite having a generally positive prognosis when treated with an ICD.
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Aims: The use of electroanatomical mapping (EAM) systems can reduce radiation exposure (RX) and it can also completely eliminate the use of RX. Radiation exposure related to conventional radiofrequency ablation procedures can have a stochastic and deterministic effect on health. The main aim of this study was to evaluate the safety and feasibility of an entirely nonfluoroscopic approach to catheter ablation (CA) using EAM CARTO3.

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Aims: The benefit of prolonged implantable cardioverter-defibrillator (ICD)/cardiac resynchronization therapy defibrillator (CRT-D) therapy following device replacement is hindered by clinical and procedure-related adverse events (AEs). Adverse events rate is highest in more complex devices and at upgrades, as per the REPLACE registry experience, but is changing owing to the improvement in device technology and medical care. We aimed at understanding the extent and type of AEs in a contemporary Italian population.

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Aims: The availability of novel drugs might affect the modern interplay between pharmacological and device therapy of heart failure with reduced ejection fraction (HFrEF). The aim of this study was to assess the cost-effectiveness of sacubitril/valsartan as compared with an implantable cardioverter-defibrillator (ICD) on top of optimal medical therapy in patients with HFrEF.

Methods: Data from 2000 adults with demographic and clinical characteristics similar to those in the PARADIGM-HF were derived as inputs for a four-state Markov model simulated HFrEF.

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Chronic heart failure with reduced (≤ 40%) ejection fraction (HFrEF) poses a significant residual mortality risk despite modern optimal medical therapy. In the last decades, we have witnessed the introduction of breakthrough cardiac implantable electronic devices (CIED) aimed at addressing sudden cardiac death and HF progression in patients with HFrEF, leading to improved survival and functional capacity. Following their introduction, implantable cardioverter defibrillators (ICD) and cardiac resynchronization therapy (CRT) have undergone substantial technological improvements and have been investigated in different settings of HFrEF, some of which yielded controversial results.

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Article Synopsis
  • This multicenter study investigated factors influencing zero-fluoroscopy (ZFL) ablation procedures for supraventricular tachycardias among 430 patients.
  • Results showed ZFL was achieved in 67.2% of procedures, with key predictors including the operator’s experience, type of arrhythmia, and the patient's age.
  • The use of 3D mapping systems was effective in all cases, minimizing fluoroscopy use while maintaining high safety and effectiveness.
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Ischemic strokes may be associated with atrial fibrillation (AF). AF detection is critical in ischemic stroke survivors, often recommending a switch from antiplatelet therapy to oral anticoagulants for secondary prevention. Areas covered: Cardiac implantable electronic devices (CIED) with their long-term recording capability allows to document AF and to quantify the arrhythmia burden.

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Aim: Ventricular tachycardia (VT)/ventricular fibrillation (VF) occurrence after cardiac resynchronization therapy-defibrillator (CRT-D) replacement is unknown; hence, there is no practical guideline to recommend either CRT-D or CRT-pacemaker at the time of device replacement. We observed the 1-year VT/VF occurrence after CRT-D replacement in a subanalysis of the Detect Long-term Complications after ICD Replacement (DECODE) registry.

Methods And Results: A total of 332 consecutive patients who had undergone CRT-D replacement from 2013 to 2015 were enrolled in 36 Italian centres.

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Aims: To investigate the different strategies adopted for the management of antithrombotic therapy and the related hemorrhagic and infective complication rates in patients undergoing cardiac implantable electronic devices (CIEDs) surgery in a real-world setting.

Methods: THE Management of AntiThrOMbotic therApy in patients undergoing electrophysiological device surgery: Italian NatiOnal Multicenter Observational REgistry (HEMATOMA NO MORE) is an observational, prospective, multicenter, national cohort study (with a retrospective, multicenter, regional pilot phase) designed to enroll patients with standard indications to CIED implantations/replacements receiving concomitant antithrombotic therapy. The primary outcome is clinically significant pocket hematoma defined as a postprocedural hematoma, resulting in prolonged hospitalization and/or requiring interruption of antithrombotic therapy and/or requiring further surgery and/or requiring transfusion.

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Oral anticoagulation (OAC) is recommended in both paroxysmal atrial fibrillation (pxAF) and nonparoxysmal AF (non-pxAF), but disagreement exists in classes of recommendation. Data on incidence/rate of stroke in pxAF are conflicting, and OAC is often underused in this population. The objectives of the meta-analysis were to investigate different impact on outcomes of pxAF and non-pxAF, with and without OAC.

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The aim of this review is to formulate practical recommendations for the management of antithrombotic therapy in patients undergoing cardiac implantable electronic device (CIED) surgery by providing indications for a systematic approach to the problem integrating general technical considerations with patient-specific elements based on a careful evaluation of the balance between haemorrhagic and thromboembolic risk. Hundreds of thousands patients undergo implantation or replacement of CIEDs annually in Europe, and up to 50% of these subjects receive antiplatelet agents or oral anticoagulants. The rate of CIED-related complications, mainly infective, has also significantly increased so that transvenous lead extraction procedures are, consequently, often required.

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Aim: Hematopoietic stem cells (HSCs) and endothelial progenitor cells (EPCs) are known to play a role in the vascular responses and adaptations to exercise. We performed a quantitative assessment of HSCs and EPCs in adolescents in order to investigate whether resting levels of circulating HSCs and EPCs are comparable between elite athletes and sedentary healthy subjects.

Methods: HSCs and EPCs levels were measured in adolescent competitive football players and in age- and sex-matched sedentary controls.

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Sleep-disordered breathing (SDB) has been consistently associated with increased risk for cardiovascular diseases, including arrhythmias. The purpose of this review is to elucidate the several pathophysiologic pathways such as repetitive hypoxia and reoxygenation, increased oxidative stress, inflammation and sympathetic activation that may underlie the increased incidence of arrhythmias in SDB patients. We discuss in particular the incidence of ventricular arrhythmias, atrial fibrillation and bradyarrhythmias in SDB patients.

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Aims: Left ventricular hypertrophy (LVH) develops as a result of several clinical conditions, such as intensive training, hypertension, aortic valve stenosis. Aim of this study was to analyze the left ventricular twist (LVT) modifications in LVH patients with increasing after-load conditions.

Methods: A total of 131 patients were enrolled: 17 healthy sedentary people (Hg), without concentric LVH; 45 water polo players (ATg); 22 patients with hypertensive cardiopathy (HPg); 47 patients with different degrees of aortic stenosis (ASg); all patients had concentric LVH, ejection fraction (EF) >54%, and were age-matched.

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Background: An 84-year-old man suffering from dyspnoea on mild exertion and a 10-year history of mitral valve replacement with a mechanical prosthesis presented to our department. The patient had an isolated right aortic arch.

Investigation: Transthoracic echocardiography demonstrated severe LV systolic dysfunction (EF 25%), good function of the previously implanted mechanical prosthesis and severe aortic stenosis.

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In Italy tens of thousands of patients undergo implantation or replacement of cardiac implantable electronic devices (CIEDs) annually, and up to 50% of these subjects receive antiplatelet agents or oral anticoagulants. The rate of CIED-related complications, mainly infective, has also significantly increased, so that transvenous lead extraction procedures are often required. CIED surgery is peculiar and portends specific intrinsic risks of developing life-threatening hemorrhagic complications; on the other hand periprocedural discontinuation of antithrombotic therapy in patients at high thromboembolic risk may have catastrophic consequences.

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Background: Exercise is able to induce atrial remodeling in top-level athletes. However, evidence is mainly limited to men and based on cross-sectional studies. The aim of this prospective, longitudinal study was to investigate whether exercise is able to influence left and right atrial morphology and function also in female athletes.

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