Conclusions:   
In appropriately selected patients undergoing implantation of the S-ICD, the likelihood of needing the device removed or extracted was 5.9% over 4.4 years. The most common indications for extraction were need for bradycardia pacing, infection, and inappropriate shock due to oversensing. Those with a history of smoking and those of higher body mass indices are more likely to undergo S-ICD extraction.  Further work must be done to determine whether these results regarding rates of, and indications for, S-ICD extraction are transferrable to other health systems.
Acknowledgments: All authors take responsibility for the decision to submit the article for publication. All authors had complete access to the data analyzed in this study and take full responsibility for the integrity of the data and its analysis.