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Primary prevention implantable cardioverter defibrillator in patients with non-ischaemic cardiomyopathy: a meta-analysis of randomised controlled trials.

ABSTRACT: OBJECTIVES:The objective of this meta-analysis of randomised controlled trials (RCTs) is to evaluate the role of primary prevention implantable cardioverter defibrillator (ICD) in patients with non-ischaemic cardiomyopathy (NICM). SETTING:A meta-analysis of RCTs performed according to the Preferred Reporting Items for Systematic Reviews and Meta-analyses guidelines. DATA SOURCES:The PubMed, MEDLINE, Embase and Cochrane Central Register of Controlled Trials databases were searched for relevant articles. PARTICIPANTS:A total of 5 RCTs with 2573 patients with NICM were included. INTERVENTION:Primary prevention ICD, compared with medical therapy alone. PRIMARY AND SECONDARY OUTCOME MEASURES:All-cause mortality (primary outcome) and sudden cardiac death (SCD, secondary outcome). DATA ANALYSIS:Summary estimate HR were constructed using the random-effect DerSimonian and Laird's model. Multiple study-level subgroup analyses were performed, and interaction was tested using random-effect analysis. RESULTS:Compared with medical therapy alone, ICD placement was associated with lower risk of all-cause mortality (HR 0.79; 95%?CI 0.64 to 0.93; p<0.001; I2=0%) at a mean follow-up of 4.2 years. The risk of SCD was also lower with ICD placement (RR 0.47; 95%?CI 0.30 to 0.73; p=0.001; I2=0%) compared with control. On subgroup analyses, there was a suggestion of possible effect modification by age, in which benefit was observed in age group <60 years (HR 0.64; 95%?CI 0.47 to 0.89), but not with age ?60 years (HR 0.82; 95%?CI 0.65 to 1.03) (Pinteraction=0.058), but not with other study-level variables. CONCLUSIONS:Compared with medical therapy alone, primary prevention ICD therapy in patients with NICM is associated with a significant reduction in all-cause mortality, especially in younger patients. Future dedicated studies are needed to investigate the role of primary prevention ICD in the elderly population. PROSPEROREGISTRATIONNUMBER:PROSPERO CRD42016052010.

SUBMITTER: Barakat AF

PROVIDER: S-EPMC5726098 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature

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Primary prevention implantable cardioverter defibrillator in patients with non-ischaemic cardiomyopathy: a meta-analysis of randomised controlled trials.

Barakat Amr F AF Saad Marwan M Elgendy Akram Y AY Mentias Amgad A Abuzaid Ahmed A Mahmoud Ahmed N AN Elgendy Islam Y IY

BMJ open 20170621 6

<h4>Objectives</h4>The objective of this meta-analysis of randomised controlled trials (RCTs) is to evaluate the role of primary prevention implantable cardioverter defibrillator (ICD) in patients with non-ischaemic cardiomyopathy (NICM).<h4>Setting</h4>A meta-analysis of RCTs performed according to the Preferred Reporting Items for Systematic Reviews and Meta-analyses guidelines.<h4>Data sources</h4>The PubMed, MEDLINE, Embase and Cochrane Central Register of Controlled Trials databases were se ...[more]

PMID: 28637742

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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.

Project description:Randomized clinical trials have shown that implantable cardioverter-defibrillator (ICD) therapy saves lives. Whether the survival of patients who received an ICD in primary prevention clinical trials differs from that of trial-eligible patients receiving a primary prevention ICD in clinical practice is unknown.To determine whether trial-eligible patients who received a primary prevention ICD as documented in a large national registry have a survival rate that differs from the survival rate of similar patients who received an ICD in the 2 largest primary prevention clinical trials, MADIT-II (n = 742) and SCD-HeFT (n = 829).Retrospective analysis of data for patients enrolled in the National Cardiovascular Data Registry ICD Registry between January 1, 2006, and December 31, 2007, meeting the MADIT-II criteria (2464 propensity score-matched patients) or the SCD-HeFT criteria (3352 propensity score-matched patients). Mortality data for the registry patients were collected through December 31, 2009.Cox proportional hazards models were used to compare mortality from any cause.The median follow-up time in MADIT-II, SCD-HeFT, and the ICD Registry was 19.5, 46.1, and 35.2 months, respectively. Compared with patients enrolled in the clinical trials, patients in the ICD Registry were significantly older and had a higher burden of comorbidities. In the matched cohorts, there was no significant difference in survival between MADIT-II-like patients in the registry and MADIT-II patients randomized to receive an ICD (2-year mortality rates: 13.9% and 15.6%, respectively; adjusted ICD Registry vs trial hazard ratio, 1.06; 95% CI, 0.85-1.31; P = .62). Likewise, the survival among SCD-HeFT-like patients in the registry was not significantly different from survival among patients randomized to receive ICD therapy in SCD-HeFT (3-year mortality rates: 17.3% and 17.4%, respectively; adjusted registry vs trial hazard ratio, 1.16; 95% CI, 0.97-1.38; P = .11).There was no significant difference in survival between clinical trial patients randomized to receive an ICD and a similar group of clinical registry patients who received a primary prevention ICD. Our findings support the continued use of primary prevention ICDs in similar patients seen in clinical practice.clinicaltrials.gov Identifier: NCT00000609.

Dataset Information

Primary prevention implantable cardioverter defibrillator in patients with non-ischaemic cardiomyopathy: a meta-analysis of randomised controlled trials.

Publications

Primary prevention implantable cardioverter defibrillator in patients with non-ischaemic cardiomyopathy: a meta-analysis of randomised controlled trials.

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