Open AccessIs the pace/sense conductor related to a high voltage short circuit in a dual coil ICD system? An experimental study
Author(s) -
Nakajima Hiroshi,
Sutton Richard,
Toyoshima Takeshi
Publication year - 2014
Publication title -
journal of arrhythmia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.463
H-Index - 21
eISSN - 1883-2148
pISSN - 1880-4276
DOI - 10.1016/j.joa.2014.02.012
Subject(s) - electromagnetic coil , conductor , short circuit , electrical engineering , electrical impedance , materials science , electrode , high impedance , medicine , voltage , nuclear magnetic resonance , composite material , engineering , physics , quantum mechanics
Background We carried out a bench study of implantable cardioverter‐defibrillator (ICD) performance in order to investigate whether the right ventricular (RV) ring contributes to the occurrence of a high‐voltage (HV) short circuit. Methods A polycarbonate water bath with 0.18% saline was prepared. An ICD lead was connected to an ICD device and both were placed into the water bath. The impedance of each electrode and coil was measured. In the first experiment, the RV ring was shorted to the RV coil using an alligator clip. The impedance of each electrode and coil at shorting was measured. A maximum energy defibrillation shock was delivered. The therapy log confirmed the HV short circuit and the delivery conditions. In the second experiment, a short circuit was established between the RV ring and the superior vena cava coil and a similar procedure was followed. Results No HV short circuit was observed in either experiment. Scheduled shock energies were delivered without problems. Some changes in pace–sense impedance or coil impedance were observed, but they remained within the normal range. Conclusions The RV ring conductor is not related to HV short circuits, even if the RV ring and/or RV ring conductor is placed in contact with HV electrodes.