Predictive Role of Intraoperative Impedance in Midterm Pacing Threshold Elevation: Insights From Aveir VR Leadless Pacemaker Implantations.

Introduction: Leadless pacemakers (LPs) are a valuable treatment for bradycardia, with the Aveir offering advanced features, including a protective sleeve and active fixation. This study investigated the intraoperative factors during Aveir VR implantations that predict midterm pacing capture threshold (PCT) elevations and proposed strategies for optimizing the outcomes.

Methods And Results: This retrospective study included 67 patients who underwent Aveir VR implantations in two Japanese facilities between March and June 2023, with a 360-day follow-up.

Novel simultaneous mapping technique to treat multifocal atrial tachycardia.

Unlabelled: Although a high-resolution three-dimensional mapping system has made it possible to treat complicated atrial tachyarrhythmia (AT), there remain cases that are difficult to diagnose and treat. However, when multiple different ATs alternately appear, mapping and diagnosis of those are more difficult. Parallel mapping module is well known as a good option to simultaneously map two or more different ATs when they alternately appear.

Optimal treatment of biatrial tachycardia diagnosed by one-chamber mapping within an ultrahigh-resolution mapping system.

Biatrial tachycardia (BiAT) is a rare arrhythmia, and identification of the re-entry circuit is often complicated. By creating an activation map of the right atrium, left atrium, and coronary sinus as a single chamber, the LUMIPOINT module of the Rhythmia mapping system (Boston Scientific, Marlborough, MA, USA) can be used in real time to make an accurate diagnosis. Ablation of the Bachmann bundle is a feasible way to terminate BiAT, but might cause interatrial conduction delay and electrical isolation of the left atrial appendage.