title: Diagnosis of ICD lead failure using continuous event marker recording.
abstract: Stored electrograms enhance the ability to evaluate therapy episodes in the third-generation implantable cardioverter defibrillator. These electrograms are recorded from either the shocking or rate sensing leads, but not both. As a result, differentiation of certain types of sensing abnormalities may be difficult prior to surgical exploration. We present a case of rate sensing lead failure due to an insulation break. Several minutes of recording of the event marker in the laboratory failed to document any abnormal sensing; the diagnosis was made by recording the event marker on a 24-hour continuous (Holter) monitor. The Holter monitor/event marker combination was of substantial diagnostic value and allowed for a more focused surgical evaluation and treatment.
authors.affiliation: Department of Medicine, UT Southwestern Medical Center, Dallas, Texas 75235-9047, USA.
authors.forename: R P
authors.initials: RP
authors.lastname: Horton
authors.forename: R C
authors.initials: RC
authors.lastname: Canby
authors.forename: C A
authors.initials: CA
authors.lastname: Román
authors.forename: M E
authors.initials: ME
authors.lastname: Jessen
authors.forename: T J
authors.initials: TJ
authors.lastname: Schulte
authors.forename: R L
authors.initials: RL
authors.lastname: Page
mesh_terms: D017147:Defibrillators, Implantable; D015716:Electrocardiography, Ambulatory; D004567:Electrodes, Implanted; D004867:Equipment Design; D004868:Equipment Failure; D006801:Humans; D008297:Male; D008875:Middle Aged; D017180:Tachycardia, Ventricular / Q000628:therapy