The Boston Scientific RELIANCE 4-FRONT DF4 ICD Defibrillation Lead (REF 658) is a transvenous, active-fixation right ventricular lead designed for sensing, pacing, and high-voltage defibrillation therapy when connected to a compatible Boston Scientific implantable cardioverter defibrillator (ICD) or cardiac resynchronization therapy defibrillator (CRT-D). The lead features the standardized DF4-LLHH connector, consolidating the high-voltage and pace/sense terminals into a single in-line pin to simplify device connection and reduce header bulk.
Key Features
Single in-line DF4-LLHH connector compatible with DF4-compliant Boston Scientific ICD and CRT-D pulse generators.
Active-fixation distal tip with extendable/retractable helix for targeted right ventricular placement.
Single defibrillation shock coil configuration in the RV position.
RELIANCE family construction intended to support durability and consistent high-voltage delivery.
Steroid-eluting tip designed to support stable chronic pacing thresholds.
Designed for transvenous implantation through standard introducer techniques.
Clinical Applications
Intended for use as the right ventricular defibrillation, pacing, and sensing lead in patients indicated for ICD or CRT-D therapy.
Supports tachyarrhythmia detection and high-voltage defibrillation delivery in conjunction with a compatible pulse generator.
Suitable for new ICD/CRT-D system implants where a DF4 single-coil RV lead is appropriate per the implanting physician's assessment.
Product Information
Brand: Boston Scientific
Product Family: RELIANCE 4-FRONT
Model / REF: 658
Category: ICD Leads for Implantable Cardioverter Defibrillators
Connector: DF4-LLHH
Fixation: Active (extendable/retractable helix)
Coil Configuration: Single (RV)
Lead Length: Not specified in the located sources
Lead Body Diameter: Not specified in the located sources
Sterility: Supplied sterile, single-use (refer to manufacturer IFU)
Compatibility: Boston Scientific DF4-compliant ICD and CRT-D pulse generators
Always refer to the manufacturer's Instructions for Use for complete indications, contraindications, warnings, and implant technique.
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