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Failure to Deliver Therapy by a Riata Lead with Internal Wire Externalization and Normal Electrical Parameters During Routine Interrogation
Author(s) -
SHAH PARTHIV,
SINGH GURJIT,
CHANDRA SHALABH,
SCHUGER CLAUDIO D.
Publication year - 2013
Publication title -
journal of cardiovascular electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.193
H-Index - 138
eISSN - 1540-8167
pISSN - 1045-3873
DOI - 10.1111/j.1540-8167.2012.02361.x
Subject(s) - medicine , externalization , fluoroscopy , lead (geology) , cardiac resynchronization therapy , cardiology , heart failure , surgery , ejection fraction , psychology , geomorphology , psychoanalysis , geology
Failure to Deliver Therapy by a Riata Lead. We present a case of failure to deliver a shock by a St. Jude Medical defibrillator involving a Riata lead that was discovered incidentally while the device was attempting to deliver inappropriate therapy. Routine interrogation, including high voltage (HV) impedance, failed to reveal any abnormality. Failure to deliver therapy was confirmed during DFT testing, which revealed extremely low HV impedance only while attempting to deliver therapy. Fluoroscopy indicated moderate externalization of internal wires. This case highlights an under‐recognized issue with St. Jude Medical systems, namely the possibility that therapy may not be delivered despite the presence of normal electrical parameters during routine surveillance. (J Cardiovasc Electrophysiol, Vol. 24, pp. 94‐96, January 2013)

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