| Popis: |
Background: Cardiac Implantable Electronic Devices (CIED) include pulse generators and leads. In some implanting centres, it is common practice to combine devices with leads from different companies. Case series have reported episodic high-impedance changes in Boston Scientific CIEDs with competitor leads. We investigated the incidence of high-impedance abnormalities in matched vs. mismatched Boston Scientific CIEDs. Methods: Retrospective chart review identified all consecutive Boston Scientific Accolade pacemakers and Autogen implantable cardioverter defibrillators (ICD) implanted between January 2017 and June 2019 at a Canadian tertiary care centre. The primary outcome was the occurrence of transient, high-impedance changes which resulted in a switch to unipolar pacing / sensing in the absence of any other identifiable lead issue. Fisher exact tests (two-tailed, α = 0.05) were used to compare the incidence of outcomes in matched vs. mismatched systems. Results: 564 Boston Scientific CIEDs were identified associated with 969 individual leads. The primary outcome occurred with 22 leads (21 Medtronic and 1 Abbott), associated with occasional pacing inhibition, syncope, and/or early surgical revision. Mismatched systems were significantly associated with CIED malfunction compared to matched systems (3.4% vs. 0%, P = 0.0001). Median time from implant to unipolar safety switch was 19.3 months. Median follow-up time was 21.6 months. Conclusion: Use of mismatched leads with a Boston Scientific Accolade or Autogen device was associated with increased system malfunction and adverse clinical outcomes. Awareness of this interaction can allow for institution of appropriate programming remedies and may increase scrutiny of the use of mismatched CIED systems. |
