1. Atrial oversensing due to lead integrity failure (fracture, insulation failure) or connector problems between the header and the lead. 2. Atrial lead displacement: no evidence of microor macrodisplacement was found on chest radiography. 3. Asynchronous mode of pacing (VOO) due to magnet or programming: device interrogation ruled out this differential diagnosis. The device was fully functiona...

Acute lead dislodgment is a complication that should be managed immediately. Spontaneous reattachment of a dislodged atrial pacing lead has never been reported before. This case report describes a lucky patient whose atrial lead spontaneously gained a new functioning position after dislodgment from its initial implantation site.

Left ventricular pacemaker lead technology was evolving and different types of pacemaker lead were successively used. Sensing was modified according with this evolution, starting with initial experience that utilized epicardical left ventricular pacing through leads positioned at limited thoracotomy [1] . In other experiences a lead specifically designed for left atrial pacing via CS was used. ...

We report a case of a 73-year-old man, who was scheduled for elective dual chamber pacemaker implantation because of paroxysmal second-degree atrioventricular block. The pacemaker pocket was located in the left in-fraclavicular fossa. An active fixation ventricular lead was implanted into the right ventricular outflow tract (RVOT) through the left cephalic vein venesection, while another active...

BACKGROUND Dual chamber pacemakers (single chamber pacing dual chamber sensing cardiac pacemaker (VDD) and dual chamber pacing and sensing cardiac pacemaker (DDD)) are being used frequently in children and adolescents. The aim of this study was to verify the safety and performance of the VDD and DDD pacing systems, and to evaluate the differences between two pacing modes with regard to atrial s...

BACKGROUND It was hypothesized that atrial premature contractions (APCs) originating in the pulmonary veins (PVs) or superior vena cava (SVC) can be localized by evaluating characteristics of the P wave. METHODS AND RESULTS Thirty-eight patients with paroxysmal atrial fibrillation were studied. P wave polarity and morphology of the ECGs during pacing from PVs were analyzed and compared to tho...

OBJECTIVE To assess the true efficacy of antitachycardia pacing on spontaneous persistent atrial fibrillation in patients with an implanted atrial defibrillator, by comparing the effects of nominal pacing treatment with subthreshold pacing treatment. DESIGN The effects of antitachycardia pacing and burst 50 Hz atrial pacing on spontaneous atrial arrhythmias were evaluated six months after imp...

Introduction: Bi-atrial lead placement combined with atrial overdrive pacing has demonstrated a reduction in percent time mode switched and mode switches per day. This retrospective analysis compared long term outcomes of patients with right atrial overdrive pacing alone (DAO) to patients having atrial overdrive with bi-atrial leads (BIA) in slowing the progression of paroxysmal atrial fibrilla...

Left or biventricular (BiV) pacing, or cardiac resynchronization therapy, was proposed nearly 10 years ago as an adjunctive treatment for patients with advanced heart failure (HF) complicated by discoordinate contraction due to intraventricular conduction delay. Since then, both short-term and a growing number of long-term clinical trials have reported on the mechanisms and short- and mid-term ...

Objective: To assess the true efficacy of antitachycardia pacing on spontaneous persistent atrial fibrillation in patients with an implanted atrial defibrillator, by comparing the effects of nominal pacing treatment with subthreshold pacing treatment. Design: The effects of antitachycardia pacing and burst 50 Hz atrial pacing on spontaneous atrial arrhythmias were evaluated six months after imp...