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A Model of Long-Term Ventricular Fibrillation in Isolated Rat Hearts
Published on: February 17, 2023
Defibrillation threshold testing does not predict clinical outcomes during long-term follow-up: a meta-analysis
Stavros Stavrakis1, Nishit H Patel, Dwight W Reynolds
1Cardiovascular Section, Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma.
Pacing and Clinical Electrophysiology : PACE
|July 24, 2013
Summary
Defibrillation threshold (DFT) testing during implantable cardioverter defibrillator (ICD) implantation does not appear to reduce mortality or ventricular arrhythmias. More high-quality randomized trials are needed to confirm these findings for ICD patients.
Area of Science:
- Cardiology
- Electrophysiology
- Medical Devices
Background:
- Defibrillation threshold (DFT) testing is common during implantable cardioverter defibrillator (ICD) implantation.
- Reliable data supporting routine DFT testing are lacking.
- This meta-analysis evaluates the efficacy of DFT testing versus no DFT testing.
Purpose of the Study:
- To evaluate the efficacy of DFT testing at the time of ICD implantation.
- To assess the impact of DFT testing on total mortality and ventricular arrhythmias during follow-up.
Main Methods:
- Meta-analysis of eight studies involving 5,020 patients.
- Searched MEDLINE and EMBASE databases.
- Calculated risk ratios (RR) with 95% confidence intervals (CI) using random effects modeling.
Main Results:
- DFT testing did not reduce total mortality (RR = 0.94, 95% CI 0.74-1.21) or ventricular arrhythmias (RR = 1.19, 95% CI 0.85-1.68).
- Included studies were of generally poor quality, with only one randomized trial.
- Sensitivity analysis confirmed no single study significantly impacted the overall results.
Conclusions:
- Current data suggest DFT testing at ICD implantation does not predict mortality or ventricular arrhythmias.
- High-quality, adequately powered randomized controlled trials are necessary.
- Further research is warranted to clarify the role of DFT testing in ICD procedures.
