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Abstract
Repeat implantable cardioverter defibrillator (ICD) procedures are increasing and may be associated with higher risks for complications. To provide more information for clinical decision making, especially in light of recent defibrillator advisories, we examined a large national cohort to characterize repeat ICD procedural outcomes. Using data from the National Cardiovascular Data Registry (ICD Registry), we compared patient characteristics, reasons for ICD implantation, and associated in-hospital adverse events among 92,751 patients receiving their first device and 81,748 patients who underwent repeat procedures with (n = 31,057) and without (n = 50,691) lead involvement. Hierarchical multivariable logistic regression was used to determine the predictors of in-hospital complications. Complication rates were higher in those who underwent repeat ICD procedures with lead involvement (lead implantation or revision), compared with patients who underwent initial implants (3.2% vs 2.6%, p <0.001) or versus those with pocket-only (e.g., generator change only) procedures (3.2% vs 0.6%, p <0.001). There were significantly more in-hospital deaths, lead dislodgements, and infections requiring antibiotics in the lead involvement cohort. Compared with those who had a pocket-only procedure, the multivariable adjusted odds ratio of any complication were increased at 4.20 (95% confidence interval: 3.66 to 4.82, p <0.001) in patients who underwent repeat procedures with lead involvement excluding lead extraction or 7.11 (95% confidence interval: 5.96 to 8.48, p <0.001) in procedures involving lead extractions. In conclusion, repeat ICD procedures, when involving the addition or revision of a lead with or without concurrent lead extraction, are associated with higher complication rates compared with initial implants and with those who underwent pocket-only procedures.
View details for DOI 10.1016/j.amjcard.2014.05.010
View details for Web of Science ID 000339641700015
View details for PubMedID 24927972