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The Subcutaneous Implantable Cardioverter-defibrillator: New Features and Implant Techniques and Future Developments.

ABSTRACT: The use of subcutaneous implantable cardioverter-defibrillators (S-ICDs) has increased over time. Device-based algorithms have been developed to reduce inappropriate shocks. New implant techniques have been developed including the two-incision technique and the placement of the generator submuscularly. More patients are being implanted without general anesthesia. This review summarizes the newest S-ICD features, surgical implantation methods, and device-related safety and efficacy findings.

SUBMITTER: Zeineh NS

PROVIDER: S-EPMC7252801 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature

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The Subcutaneous Implantable Cardioverter-defibrillator: New Features and Implant Techniques and Future Developments.

Zeineh Nabil S NS Prutkin Jordan M JM

The Journal of innovations in cardiac rhythm management 20181115 11

The use of subcutaneous implantable cardioverter-defibrillators (S-ICDs) has increased over time. Device-based algorithms have been developed to reduce inappropriate shocks. New implant techniques have been developed including the two-incision technique and the placement of the generator submuscularly. More patients are being implanted without general anesthesia. This review summarizes the newest S-ICD features, surgical implantation methods, and device-related safety and efficacy findings. ...[more]

PMID: 32494477

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Project description:BackgroundThere are conflicting data on the impact of implantable cardioverter-defibrillator (ICD) shocks on subsequent mortality.ObjectivesThe aim of this study was to determine whether the arrhythmic substrate leading to ICD therapy or the therapy itself increases mortality.MethodsThe study cohort included 5,516 ICD recipients who were enrolled in 5 landmark ICD trials (MADIT-II, MADIT-RISK, MADIT-CRT, MADIT-RIT, RAID). The authors evaluated the association of device therapy with subsequent mortality in 4 separate time-dependent models: model I, type of ICD therapy; model II, type of arrhythmia for which ICD therapy was delivered; model III, combined assessment of all arrhythmia and therapy types during follow-up; and model IV, incremental risk associated with repeated ICD shocks.ResultsWhen analyzed by the type of ICD therapy (model I), a first appropriate ICD shock was associated with increased risk of subsequent mortality with or without concomitant occurrence of inappropriate shock during follow-up (hazard ratio [HR]: 2.78 and 2.31; p < 0.001 and p = 0.12), whereas inappropriate shock alone was not associated with mortality risk (HR: 1.23; p = 0.42). Similarly, ICD therapy for ventricular tachycardia (VT) ≥200 beats/min or ventricular fibrillation (VF) (model II) was associated with increased risk of death with or without concomitant therapy for VT <200 beats/min (HRs: 2.25 and 2.62; both p < 0.001), whereas appropriate therapy for VT <200 beats/min or inappropriate therapy (regardless of etiology) did not reach statistical significance (all p > 0.10). Combined assessment of all therapy and arrhythmia types during follow-up (model III) showed that appropriate ICD shocks for VF, shocks for fast VT (≥200 beats/min) without prior antitachycardia pacing (ATP), as well as shocks for fast VT delivered after failed ATP, were associated with the highest risk of subsequent death (HR: all >2.8; p < 0.001). Finally, 2 or more ICD appropriate shocks were not associated with incremental risk to the first appropriate ICD shock (model IV).ConclusionThe combined data from 5 landmark ICD trials suggest that the underlying arrhythmic substrate rather than the ICD therapy is the more important determinant of mortality in ICD recipients.

Project description:Background One third of primary prevention implantable cardioverter-defibrillator patients receive appropriate therapy, but all remain at risk of defibrillator complications. Information on these complications in contemporary cohorts is limited. This study assessed complications and their risk factors after defibrillator implantation in a Dutch nationwide prospective registry cohort and forecasts the potential reduction in complications under distinct scenarios of updated indication criteria. Methods and Results Complications in a prospective multicenter registry cohort of 1442 primary implantable cardioverter-defibrillator implant patients were classified as major or minor. The potential for reducing complications was derived from a newly developed prediction model of appropriate therapy to identify patients with a low probability of benefitting from the implantable cardioverter-defibrillator. During a follow-up of 2.2 years (interquartile range, 2.0-2.6 years), 228 complications occurred in 195 patients (13.6%), with 113 patients (7.8%) experiencing at least one major complication. Most common ones were lead related (n=93) and infection (n=18). Minor complications occurred in 6.8% of patients, with lead-related (n=47) and pocket-related (n=40) complications as the most prevailing ones. A surgical reintervention or additional hospitalization was required in 53% or 61% of complications, respectively. Complications were strongly associated with device type. Application of stricter implant indication results in a comparable proportional reduction of (major) complications. Conclusions One in 13 patients experiences at least one major implantable cardioverter-defibrillator-related complication, and many patients undergo a surgical reintervention. Complications are related to defibrillator implantations, and these should be discussed with the patient. Stricter implant indication criteria and careful selection of device type implanted may have significant clinical and financial benefits.

Dataset Information

The Subcutaneous Implantable Cardioverter-defibrillator: New Features and Implant Techniques and Future Developments.

Publications

The Subcutaneous Implantable Cardioverter-defibrillator: New Features and Implant Techniques and Future Developments.

Similar Datasets

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