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Inappropriate ICD Therapy Due to Proarrhythmic ICD Shocks and Hyperpolarization
Author(s) -
HEALY EDWARD,
GOYAL SANJEEV,
BROWNING CLIFFORD,
ROBOTIS DIONYSSIS,
RAMASWAMY KARTHICK,
ROFINONADOWORNY KAREN,
ROSENTHAL LAWRENCE
Publication year - 2004
Publication title -
pacing and clinical electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.686
H-Index - 101
eISSN - 1540-8159
pISSN - 0147-8389
DOI - 10.1111/j.1540-8159.2004.00455.x
Subject(s) - proarrhythmia , medicine , cardiology , ventricular fibrillation , shock (circulatory) , defibrillation , implantable cardioverter defibrillator , atrial fibrillation , anesthesia
A 50‐year‐old man with an ischemic cardiomyopathy underwent ICD implantation for inducible ventricular fibrillation (VF). Sixteen months later he experienced inappropriate ICD therapy due to atrial fibrillation with a rapid ventricular response. The initial shock resulted in the initiation of VF (proarrhythmia) and the patient received an additional shock converting his rhythm to an idioventricular rhythm with a cycle length of 490 ms (122 beats/min). Due to lead hyperpolarization, the device oversensed ventricular events and the patient subsequently received additional shocks. (PACE 2004; 27:415–416)