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Research Article| Volume 382, P33-39, July 01, 2023

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Third-generation subcutaneous implantable cardioverter defibrillator and intermuscular two-incision implantation technique in patients with Arrhythmogenic cardiomyopathy: 3-year follow-up

  • Author Footnotes
    1 These authors contributed equally as first author to this study.
    Federico Migliore
    Correspondence
    Corresponding author at: Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padova, Via Giustiniani 2, 35121, Padua,Italy.
    Footnotes
    1 These authors contributed equally as first author to this study.
    Affiliations
    Division of Cardiology, Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padua, Padua, Italy
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  • Author Footnotes
    1 These authors contributed equally as first author to this study.
    Raimondo Pittorru
    Footnotes
    1 These authors contributed equally as first author to this study.
    Affiliations
    Division of Cardiology, Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padua, Padua, Italy
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  • Manuel De Lazzari
    Affiliations
    Division of Cardiology, Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padua, Padua, Italy
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  • Alberto Cipriani
    Affiliations
    Division of Cardiology, Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padua, Padua, Italy
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  • Barbara Bauce
    Affiliations
    Division of Cardiology, Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padua, Padua, Italy
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  • Martina Perazzolo Marra
    Affiliations
    Division of Cardiology, Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padua, Padua, Italy
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  • Enrico Giacomin
    Affiliations
    Division of Cardiology, Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padua, Padua, Italy
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  • Pietro Bernardo Dall'Aglio
    Affiliations
    Division of Cardiology, Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padua, Padua, Italy
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  • Author Footnotes
    2 Boston Scientific, Cardiac Rhythm Management, Diegem, Belgium.
    Stefano Accinelli
    Footnotes
    2 Boston Scientific, Cardiac Rhythm Management, Diegem, Belgium.
    Affiliations
    Division of Cardiology, Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padua, Padua, Italy
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  • Sabino Iliceto
    Affiliations
    Division of Cardiology, Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padua, Padua, Italy
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  • Domenico Corrado
    Affiliations
    Division of Cardiology, Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padua, Padua, Italy
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  • Author Footnotes
    1 These authors contributed equally as first author to this study.
    2 Boston Scientific, Cardiac Rhythm Management, Diegem, Belgium.

      Highlights

      • Preliminary studies demonstrated that subcutaneous implantable cardioverter defibrillator (S-ICD) can effectively treat ventricular arrythmias in patients with arrhythmogenic cardiomyopathy (ACM) despite relatively high inappropriate shocks (IS) mostly due to T-wave oversensing (TWOS) and device-related complications.
      • Data on the potential advantages of combining the third-generation S-ICD with modern software upgrade and the intermuscular (IM) two-incision implantation technique in ACM with different phenotypic variants are lacking.
      • According to our findings, although the third-generation S-ICD implanted with the IM two-incision technique appears to be associated with a low risk of device-related complications and IS due to TWOS, the risk of IS due to myopotential should be considered.

      Abstract

      Background

      Long-term data on the potential advantages of combining the third-generation subcutaneous implantable cardioverter defibrillator (S-ICD) with modern software upgrade including the “SMART Pass”, modern programming strategies and the intermuscular (IM) two-incision implantation technique in arrhythmogenic cardiomyopathy (ACM) with different phenotypic variants are lacking. In this study we evaluated the long-term outcome of patients with ACM who underwent third-generation S-ICD (Emblem, Boston Scientific) and IM two-incision technique.

      Methods

      The study population included 23 consecutive patients [70% male, median age 31 (24–46) years] diagnosed with ACM with different phenotypic variants who received third-generation S-ICD implantation with the IM two-incision technique.

      Results

      During a median follow-up of 45.5 months [16–65], 4 patients (17.4%) received a at least one inappropriate shock (IS), with median annual event rate of 4.5%. Extra-cardiac oversensing (myopotential) during effort represented the only cause of IS. No IS due to T-wave oversensing (TWOS) were recorded. Only one patient (4.3%) experienced device-related complication consisting of premature cell battery depletion requiring device replacement. No device explantation because of need for anti-tachycardia pacing or ineffective therapy occurred. There was no significant difference between patients who did and did not experienced IS with regard to baseline clinical, ECG and technical characteristics. Five patients (21.7%) received appropriate shocks on ventricular arrythmias.

      Conclusions

      According to our findings, although the third-generation S-ICD implanted with the IM two-incision technique appears to be associated with a low risk of complications and IS due to cardiac oversensing, the risk of IS due to myopotential mainly during effort should be considered.

      Keywords

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