Insights Into Defibrillator Shocks

Improper Implantable Cardioverter Defibrillator Shocks

The second ECG recorded supraventricular tachycardia at the time his hemodynamic status deteriorated and decision was made to perform electrical cardioversion with 120 Joules of biphasic synchronized direct current with follow up ECG that showed atrial paced rhythm (Figure 1B). His condition improved and started on amiodarone 200 mg, anticoagulation, and subsequent follow up for ICD reprogrammi...

Inappropriate Implantable Cardioverter-Defibrillator Shocks

Results A total of 1,544 ICD patients (79% male, age 61 13 years) were included in the analysis. During the follow-up period of 41 18 months, 13% experienced 1 inappropriate shocks. The cumulative incidence steadily increased to 18% at 5-year follow-up. Independent predictors of the occurrence of inappropriate shocks included a history of atrial fibrillation (hazard ratio [HR]: 2.0, p 0.01) and...

Antitachycardia pacing to terminate ventricular tachyarrhythmia: new insights into how to reduce painful implantable cardioverter defibrillator shocks.

This editorial refers to ‘Safety and efficacy of programming a high number of antitachycardia pacing attempts for fast ventricular tachycardia: a prospective study’ by R.P. Martins et al., on page 1457 and ‘First inappropriate implantable cardioverter defibrillator therapy is often due to inaccurate device programming: analysis of the French OPERA registry’ by A. Leenhardt et al., on page 1465

New insights into particle acceleration at relativistic transverse shocks

We have investigated the problem of particle acceleration at relativistic transverse shocks within the framework of the Resonant Cyclotron Absorption (RCA) model. This model (Hoshino et al., 1992; Gallant & Arons, 1994), that has been so far considered the most successful at explaining particle acceleration at the pulsar wind termination shock in plerions, applies to a shock transition occurrin...

Prognostic Significance of Implantable Cardioverter-Defibrillator Shocks