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Cardiac Arrest Induced by Anti-Bradycardia and Anti-Tachycardia Therapies of an Implantable Cardioverter Defibrillator

Mauro Toniolo, Elisabetta Daleffe, Luca Rebellato, Domenico Facchin and Alessandro Proclemer

Implantable cardioverter-defibrillators (ICD) can terminate ventricular tachy-arrhythmias (VTs) with shocks or antitachycardia pacing (ATP). Lots of studies demonstrated that ATP terminates most of VTs but with a 1% to 7% risk of acceleration or precipitation of these arrhythmias. Also, anti-bradycardia therapy can have an intrinsic arrythmogenic risk.