Publications by authors named "Nathaniel Steiger"

Article Synopsis
  • Researchers developed a potato model to test cardiac pulsed field ablation (PFA), addressing the lack of established in vitro methods for this evaluation.
  • Using a specific electrode setup and high-voltage generator, they created lesions in potato slabs, which were stained to visualize damage.
  • The study found that lesion size grew consistently with higher voltage and more applications, mirroring results seen in heart cell studies.
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  • High-frequency low-tidal-volume (HFLTV) ventilation is more effective than standard ventilation (SV) during radiofrequency catheter ablation (RFCA) for treating paroxysmal atrial fibrillation (PAF), as it enhances procedural efficiency and patient outcomes.
  • A study analyzed 70 patients who underwent pulmonary vein isolation with either HFLTV or SV, revealing that HFLTV led to shorter ablation durations, higher contact force, and better impedance reduction while maintaining the same ablation index.
  • Overall, HFLTV ventilation resulted in significant reductions in total procedural time, ablation time, and RF time compared to SV, indicating its advantages in improving ablation parameters.
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Cardiac implantable electronic device (CIED) infections represent one of the most threatening complications associated with device implantation, due to an increase in morbidity and mortality rates, as well as healthcare costs. Besides, it is important to highlight that when compared to the initial implantation of a device, the risks associated with procedures like generator changes, lead and pocket revisions, or device upgrades double. Consequently, to address this issue, various scoring systems, like the PADIT (Prior Procedures, Age, Depressed Renal Function, Immunocompromised Status, Type of Procedure), the RI-AIAC (Ricerca Sulle Infezioni Associate a ImpiAnto o Sostituzione di CIED), and the Shariff score, along with predictive models, have been developed to identify patients at a greater risk of infection.

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Introduction: Training in clinical cardiac electrophysiology (CCEP) involves the development of catheter handling skills to safely deliver effective treatment. Objective data from analysis of ablation data for evaluating trainee of CCEP procedures has not previously been possible. Using the artificial intelligence cloud-based system (CARTONET), we assessed the impact of trainee progress through ablation procedural quality.

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Article Synopsis
  • * The research included patients with significantly reduced heart function and compared outcomes like heart failure hospitalizations and all-cause mortality between LBBAP and BIVP for both sexes.
  • * Results showed men had better outcomes with LBBAP compared to BIVP, while women showed no significant difference in outcomes between the two pacing methods.
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Background: Left bundle branch area pacing (LBBAP) has emerged as a physiological alternative pacing strategy to biventricular pacing (BIVP) in cardiac resynchronization therapy (CRT). We aimed to assess the impact of LBBAP vs. BIVP on all-cause mortality and heart failure (HF)-related hospitalization in patients undergoing CRT.

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Article Synopsis
  • This study compared three pacing strategies for cardiac resynchronization therapy: left bundle branch pacing (LBBP), left ventricular septal pacing (LVSP), and biventricular pacing (BIVP).
  • The primary outcome measured was freedom from heart failure-related hospitalizations and all-cause mortality, finding that LBBP significantly outperformed LVSP and showed better outcomes than BIVP.
  • Results indicated that LBBP patients had a higher rate of freedom from heart failure hospitalizations (83%) compared to LVSP patients (51.6%) and similar outcomes between LVSP and BIVP.
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  • Intracardiac echocardiography (ICE) is being evaluated against transesophageal echocardiography (TEE) for guiding left atrial appendage occlusion (LAAO) procedures, focusing on procedural characteristics and outcomes.
  • A review of twelve studies involving 5,637 patients shows that ICE and TEE have comparable success rates and adverse event occurrences, but ICE significantly reduces in-room time by about 28.6 minutes.
  • Although both methods result in similar rates of periprocedural leaks, ICE guidance is linked to a higher occurrence of residual interatrial septal defects compared to TEE.
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Background: Infection is the most dreaded complication of cardiac implantable electronic devices (CIEDs), particularly in patients undergoing high-risk procedures (eg, generator change, device upgrade, lead/pocket revision).

Objective: The purpose of this study was to describe the impact of chlorhexidine gluconate (CHG) pocket lavage in high-risk procedures.

Methods: Patients from a prospective multicenter registry undergoing high-risk procedures were included.

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Article Synopsis
  • Epicardial access (EA) is gaining importance for treating ventricular arrhythmias, but it's underused due to high complication risks and challenging procedures.
  • * A study assessed the SAFER technique for EA, finding it to be 100% successful with no severe complications like right ventricular perforation or major hemorrhagic issues.
  • * The SAFER technique is simple, efficient, and offers lower complication rates compared to older methods, making it a promising option for interventional cardiology.
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The authors sought to evaluate a method for improving radiofrequency (RF) lesion durability using doxorubicin encased in heat-sensitive liposomes (HSL-dox). Using a porcine model, RF ablations were performed in the right atrium after systemic infusion of either HSL-dox or saline control given immediately before mapping and ablation. Lesion geometry was measured with voltage mapping immediately postablation and after 2 weeks of survival.

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Background: Left bundle branch area pacing (LBBAP) for cardiac resynchronization therapy (CRT) is an alternative to biventricular pacing (BiVp).

Objectives: The purpose of this study was to compare the outcomes between LBBAP and BiVp as an initial implant strategy for CRT.

Methods: In this prospective multicenter, observational, nonrandomized study, first-time CRT implant recipients with LBBAP or BiVp were included.

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Background: Focal atrial tachycardias (ATs) represent 5-15% of sustained supraventricular tachycardias (SVTs). Characteristic distribution of sites of origin and detailed electrophysiologic characterization of AT from specific sites of origin (SOO) have been described. Acute success and recurrence are less favorable than for other SVTs.

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Article Synopsis
  • * The article reviews how lifestyle changes can impact AF management, drawing on studies published from 1998 to now, identifying key risk factors like age, sex, obesity, and alcohol consumption.
  • * Evidence suggests that modifying lifestyle can significantly reduce the risk and severity of AF symptoms, highlighting the importance of a collaborative approach to treatment and prevention.
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  • Pulmonary arterial hypertension (PAH) is a serious and rare condition where blood vessels in the lungs malfunction, leading to increased pressure, heart issues, and potentially early death.
  • There are three main types of medications for PAH: prostacyclin analogs, endothelin receptor antagonists (ERAs), and phosphodiesterase type 5 inhibitors that boost nitric oxide levels.
  • Recent clinical trials are exploring new oral therapies and improved formulations, aiming to review current treatments and highlight recent advancements in these drug classes.
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