Heart rhythm : the official journal of the Heart Rhythm Society
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Brugada syndrome (BrS) is characterized by repolarization abnormality with ST-segment elevation in the right ventricular outflow tract (RVOT). ⋯ The instability and heterogeneity of repolarization within the epicardium of the RVOT seem to be associated with arrhythmogenesis in both patients and in the in vitro tissue models of BrS.
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Clinical Trial
Large, single-center, single-operator experience with transvenous lead extraction: outcomes and changing indications.
Lead extraction is increasingly necessary given the exponential growth in cardiac device implantation. Meanwhile, the tools, indications, and outcomes of this procedure continue to change. ⋯ In a high-volume center, lead extraction has a high success rate and low complication rate. Infection was the most common indication overall. Lead failure has decreased in relative proportion. Implantable cardioverter-defibrillator leads and longer lead implant time are associated with a requirement for laser lead extraction.
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Randomized Controlled Trial Clinical Trial
Electromagnetic interference with pacemakers caused by portable media players.
Electromagnetic fields generated by electrical devices may cause interference with permanent pacemakers. Media players are becoming a common mode of portable entertainment. The most common media players used worldwide are iPods. These devices are often carried in a shirt chest pocket, which may place the devices close to an implanted pacemaker. ⋯ iPods placed within 2 inches of implanted pacemakers monitored via the telemetry wand can cause interference with pacemakers.
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Concern exists regarding the potential electromagnetic interaction between pacemakers, implantable cardioverter-defibrillators (ICDs) and digital music players (DMPs). A preliminary study reported interference in 50% of patients whose devices were interrogated near Apple iPods. ⋯ Contrary to a prior report, we did not identify any evidence for electromagnetic interference between a selection of DMPs and intrinsic function of PM/ICDs. The DMPs did sometimes interfere with device-programmer communication, but not in a way that compromised device function. Therefore, we recommend that DMPs not be used during device interrogation, but suggest that there is reassuring counterevidence to mitigate the current high level of concern for interactions between DMPs and implantable cardiac rhythm devices.