High-voltage impedance rise; mechanism and management in patients with transvenous implantable cardioverter-defibrillators: a case series.

ABSTRACT:

Background

We describe a case series of patients for a gradual rise in daily, low-voltage sub-threshold measurement (LVSM) of shock (high-voltage, HV) impedance in a group of patients with Boston Scientific implantable cardioverter-defibrillators (ICDs) and investigate the cause of the abnormality.

Case summary

Six patients presented with a gradual rise in HV impedance above normal range (132.5 ± 20.8 Ω). Patients were young with a mean age of 29 ± 11 years, four patients had hypertrophic cardiomyopathy, one left ventricular non-compaction, and one long QT. All lead designs were silicon body with GORE polytetrafluoroethylene (ePTFE) coated coils, and a lower true shock impedance (TSI) was seen in all cases with full output synchronized shock. We compared the rate of HV imped

SUBMITTER: Monkhouse C 

PROVIDER: S-EPMC6939807 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature