{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,5,14]],"date-time":"2025-05-14T01:49:29Z","timestamp":1747187369548,"version":"3.40.5"},"reference-count":16,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2020,11,19]],"date-time":"2020-11-19T00:00:00Z","timestamp":1605744000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Pacing Clinical Electrophis"],"published-print":{"date-parts":[[2021,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>Implantable cardioverter defibrillators use low\u2010voltage shock impedance measurements to monitor the lead integrity. However, previous case reports suggest that low\u2010voltage shock impedance measurements may fail to detect insulation breaches that can cause life\u2010threatening electrical short circuits.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods and results<\/jats:title><jats:p>We report six cases of insulation breaches in transvenous defibrillation leads that were not obvious during standard interrogations and testing of the lead beforehand. In two cases, an electrical short circuit during commanded shock delivery for internal electrical cardioversion resulted in a total damage of the ICD generator. In one of these cases, commanded shock delivery induced ventricular fibrillation, which required external defibrillation. In two cases, a shock due to ventricular tachycardia was aborted as the shock impedance was less than 20\u00a0\u03a9. However, in both cases the tiny residual shock energy terminated the ventricular tachycardia. In contrast, in one case the residual energy of the aborted shock did not end ventricular fibrillation induced at defibrillator threshold testing. In one case, the ICD indicated an error code for a short circuit condition detected during an adequate shock delivery.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>This case series illustrates that low\u2010voltage shock impedance measurements can fail to detect insulation breaches. These data suggest that in patients without a contraindication, traditional defibrillator threshold testing or high voltage synchronized shock at the time of device replacement should be considered.<\/jats:p><\/jats:sec>","DOI":"10.1111\/pace.14117","type":"journal-article","created":{"date-parts":[[2020,11,3]],"date-time":"2020-11-03T06:40:57Z","timestamp":1604385657000},"page":"93-100","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Low\u2010voltage shock impedance measurements: A false sense of security"],"prefix":"10.1111","volume":"44","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2043-7050","authenticated-orcid":false,"given":"Abdul Shokor","family":"Parwani","sequence":"first","affiliation":[{"name":"Department of Cardiology Charit\u00e9 \u2010 Universitaetsmedizin Berlin  Campus Virchow\u2010Klinikum Berlin Germany"},{"name":"DZHK (German Centre for Cardiovascular Research)  Berlin Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Philipp","family":"Lacour","sequence":"additional","affiliation":[{"name":"Department of Cardiology Charit\u00e9 \u2010 Universitaetsmedizin Berlin  Campus Virchow\u2010Klinikum Berlin Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Philip","family":"Franke","sequence":"additional","affiliation":[{"name":"Department of Cardiology Charit\u00e9 \u2010 Universitaetsmedizin Berlin  Campus Virchow\u2010Klinikum Berlin Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Uwe","family":"Reichert","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine and Cardiology Lausitzer Seenland Klinikum  Hoyerswerda Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Klein","family":"Christoph","sequence":"additional","affiliation":[{"name":"German Heart Institute  Berlin Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Thomas","family":"Beiert","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine II University Hospital Bonn, Rheinische Friedrich\u2010Wilhelms University  Bonn Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rafal","family":"Supryn","sequence":"additional","affiliation":[{"name":"Clinical Department of Cardiology and Arterial Hypertension Central Clinical Hospital of the MSWiA in Warsaw  Warsaw Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Karthikeyan","family":"Rangasamy","sequence":"additional","affiliation":[{"name":"Coastal Cardiology Clinic North Gosford  New South Wales Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tony","family":"Kull","sequence":"additional","affiliation":[{"name":"Vidler Avenue Woy Woy  New South Wales Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0194-4615","authenticated-orcid":false,"given":"Felix","family":"Hohendanner","sequence":"additional","affiliation":[{"name":"Department of Cardiology Charit\u00e9 \u2010 Universitaetsmedizin Berlin  Campus Virchow\u2010Klinikum Berlin Germany"},{"name":"DZHK (German Centre for Cardiovascular Research)  Berlin Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Frank","family":"Heinzel","sequence":"additional","affiliation":[{"name":"Department of Cardiology Charit\u00e9 \u2010 Universitaetsmedizin Berlin  Campus Virchow\u2010Klinikum Berlin Germany"},{"name":"DZHK (German Centre for Cardiovascular Research)  Berlin Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Andreas","family":"Kucher","sequence":"additional","affiliation":[{"name":"BIOTRONIK SE &amp; 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