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  • Title: Significance of supraventricular tachyarrhythmias in patients with implanted pacing cardioverter defibrillators.
    Author: Schmitt C, Montero M, Melichercik J.
    Journal: Pacing Clin Electrophysiol; 1994 Mar; 17(3 Pt 1):295-302. PubMed ID: 7513854.
    Abstract:
    Eighty-six patients were treated with an implantable cardioverter defibrillator (ICD) because of sustained ventricular tachycardia (VT) or ventricular fibrillation (VF). In 27 patients an epicardial system was used, in 59 patients a transvenous system with a subcutaneous patch electrode was implanted. During a mean follow-up time of 17 +/- 9 months, inappropriate activations of the ICD due to supraventricular tachycardia were documented by Holter monitoring in 14 patients (16%). In 8 patients paroxysmal atrial fibrillation (AF), in 2 patients chronic AF, in 1 patient atrial flutter, and in 3 patients sinus tachycardia triggered antitachycardia pacing functions (12 patients) or internal defibrillation (2 patients). In 3 patients (5%) VT was induced by inappropriate antitachycardia pacing. In an additional 18 patients (21%) inappropriate activation of antitachycardia functions due to atrial tachyarrhythmias were suspected based on telemetry readouts or the patient's history. Inappropriate activation of ICD therapy triggered by intermittent supraventricular tachyarrhythmias is common. Further improvements of detection algorithms for supraventricular tachycardia are required in future device generations.
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