Acute transient non-physiological over-sensing in the ventricle with a DF4 lead |
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| Authors: | Kevin Kit Ng Paul A Gould |
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| Institution: | aPrincess Alexandra Hospital, Department of Cardiology, Queensland, Australia;bPrincess Alexandra Hospital, Department of Cardiology, University of Queensland, Department of Medicine, Brisbane, Australia |
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| Abstract: | The DF-4 is a new defibrillator lead technology. We present two cases of non-physiological transient ventricular over-sensing in patients who underwent implantation of an ICD for secondary prevention. Case 1 had ventricular over-sensing during pacing threshold evaluation post defibrillation testing while Case 2 had the lead integrity alert triggered immediately post discharge with transient over-sensing. No lead-connector issues were found. Case 1 was likely due to improper venting of the header and trapped air. Case 2 was hypothesized to be due to intermittent header pin non-contact secondary to blood in the header. These cases reveal that DF-4 leads are subject to both reported and potentially novel causes of transient acute ventricular over-sensing. |
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| Keywords: | Implantable cardioverter defibrillator DF-4 lead Over-sensing |
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