Key result
High impedance measurements identified defective implantable cardioverter defibrillator systems in four cases, serving as an early sign of malfunction.
Why the study?
Does routine impedance measurement help troubleshoot and identify implantable cardioverter defibrillator (ICD) system malfunctions?
Case Report (n=4)
Does routine impedance measurement help troubleshoot and identify implantable cardioverter defibrillator (ICD) system malfunctions?
Routine impedance measurements can serve as an early diagnostic tool for troubleshooting ICD system malfunctions such as lead fractures or faulty connections.
Answers are grounded in this paper and cite their sources.
May flag ICD malfunctions early in select cases; hypothesis-generating and should not yet change practice.
High impedance measurements may be used to troubleshoot ICD system malfunction. In four different cases a defective system was identified or confirmed by an abnormal impedance: two secondary to lead fractures, one to an adapter faulty connection, and one to a loose set-screw connection. This led to further diagnostic procedures that ultimately localized the difficulty. Though the problems with ICD may be of diverse origins, routine use of impedance measurement for the troubleshooting of these systems may serve as an early sign of malfunction and would point the need for further investigation.
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HADDAD et al. (1994) conducted a case report in Implantable cardioverter defibrillator system malfunction (n=4). Impedance measurements was evaluated on Identification of defective ICD system. High impedance measurements identified defective implantable cardioverter defibrillator systems in four cases, serving as an early sign of malfunction.
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