A Rare type of Ventricular Oversensing in ICD Therapy—Inappropriate ICD Shock Delivery Due to Triple Counting

Irregular sensing by triple counting of wide QRS complexes resulted in inappropriate shocks in a patient with a biventricular implantable cardioverter defibrillator (ICD): A 66‐year‐old male patient with ischemic cardiomyopathy, left bundle branch block, and impaired left ventricular function receiv...

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Veröffentlicht in:Pacing and clinical electrophysiology 2010-02, Vol.33 (2), p.e17-e19
Hauptverfasser: GUENTHER, MICHAEL, RAUWOLF, THOMAS P., BOCK, MANJA, STRASSER, RUTH H., BRAUN, MARTIN U.
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Sprache:eng
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Zusammenfassung:Irregular sensing by triple counting of wide QRS complexes resulted in inappropriate shocks in a patient with a biventricular implantable cardioverter defibrillator (ICD): A 66‐year‐old male patient with ischemic cardiomyopathy, left bundle branch block, and impaired left ventricular function received a biventricular ICD for optimal therapy of heart failure (CHF). Two years after implantation, the patient experienced recurrent unexpected ICD shocks without clinical symptoms of malignant tachyarrhythmia, or worsened CHF. The patient's condition rapidly worsened, with progressive cardiogenic shock and electrical–mechanical dissociation. After unsuccessful resuscitation of the patient the interrogation of the ICD showed an initial triple counting of extremely wide and fragmented QRS complexes with inappropriate shocks. (PACE 2010; 33:e17–e19)
ISSN:0147-8389
1540-8159
DOI:10.1111/j.1540-8159.2009.02583.x