The subcutaneous implantable cardioverter defibrillator (S-ICD) is an alternative to transvenous ICD in patients who do not need cardiac pacing. We report the case of a young isometric athlete who received S-ICD for primary prevention of sudden death. Lead dislodgement and myopotential noise oversensing during isometric training led to inappropriate shock, and a surgical revision was performed. During the procedure, strong fibrous adhesions were found, requiring polytetrafluoroethylene dilator sheaths. The S-ICD was finally reimplanted. Despite continued isometric training, no more myopotential oversensing occurred after 1-year follow-up. The present case highlights the possible higher risks of lead complication in an isometric athlete and the uncommon effort in removing an old-generation subcutaneous defibrillator lead.
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