The Boston Scientific RELIANCE 4-FRONT DF4 ICD Defibrillation Lead (REF 685) is a transvenous endocardial lead intended for connection to compatible Boston Scientific implantable cardioverter defibrillator (ICD) and CRT-D pulse generators equipped with a DF4-LLHH connector port. The lead is engineered to deliver high-voltage defibrillation therapy as well as pace/sense functionality through a single, streamlined connector interface, supporting a simplified implant workflow in the right ventricle.
Key Features
DF4-LLHH single-connector design consolidating pace/sense and high-voltage conductors into one terminal pin
Active fixation via extendable/retractable helix for targeted right ventricular placement
Single-coil shocking configuration with RV defibrillation coil
Silicone lead body with polyurethane (Optim or equivalent) abrasion-resistant coating as specified by the manufacturer
Steroid-eluting tip intended to help reduce acute pacing thresholds
Designed for compatibility with Boston Scientific DF4 ICD and CRT-D generators
Clinical Applications
High-voltage defibrillation therapy delivery for patients indicated for an ICD or CRT-D system
Right ventricular pacing and intracardiac sensing
Antitachycardia pacing (ATP) delivery via a compatible pulse generator
Use in new ICD/CRT-D implants where a single-coil DF4 lead configuration is selected by the implanting physician
Product Information
Brand: Boston Scientific
Product Family: RELIANCE 4-FRONT
REF / UPN: 685
Category: ICD Leads for Implantable Cardioverter Defibrillators
Connector: DF4-LLHH
Fixation: Active (extendable/retractable helix)
Coil Configuration: Single-coil (RV)
Lead Length: Not specified in the located sources
Lead Diameter: Not specified in the located sources
Sterilization: Supplied sterile for single use; refer to manufacturer IFU
Regulatory / Clinical Suitability: Refer to the official Boston Scientific Instructions for Use and regional regulatory labeling
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