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Analysis of Pacing/Defibrillator Lead Failure Using Device Diagnostics and Pacing Maneuvers
Author(s) -
CHUNG EUGENE H.,
CASAVANT DAVID,
JOHN ROY M.
Publication year - 2009
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.1540-8159.2009.02319.x
Subject(s) - medicine , lead (geology) , cardiac pacing , ventricular pacing , cardiology , heart failure , medical emergency , geomorphology , geology
Patients with Medtronic Sprint Fidelis (Medtronic Inc., Minneapolis, MN, USA) lead failures present with oversensing, resulting in pacing inhibition and inappropriate shocks. We present a case of lead noise from the right ventricular (RV) ring conductor, resulting in multiple inappropriate shocks with subsequent pacing inhibition and syncope. RV pacing lead impedance at no point exceeded 1,000 ohms. We found that increased noise and oversensing was more likely to be induced when pacing at higher pulse widths. RV pacing outputs at lower pulse widths may decrease susceptibility to noise generation and prove an effective temporizing measure in pacing‐dependent patients .