The Boston Scientific RELIANCE 4-FRONT DF4 ICD Defibrillation Lead (REF 651) is a transvenous defibrillation lead designed for chronic implantation in the right ventricle and connection to compatible Boston Scientific implantable cardioverter defibrillator (ICD) and CRT-D pulse generators. The RELIANCE 4-FRONT family uses a streamlined DF4-LLHH inline connector to simplify the header interface, reducing the number of set-screws and connections at the device pocket. REF 651 is configured as a single-shock-coil, active-fixation lead intended for sensing, pacing, and high-voltage defibrillation therapy delivery.
Key Features
Single-coil transvenous defibrillation lead configuration
DF4-LLHH inline connector for streamlined header interface
Active fixation with extendable/retractable helix for stable RV apical or septal placement
Silicone lead body with polyurethane segments and steroid-eluting tip designed to support low chronic pacing thresholds
Compatible with Boston Scientific ICD and CRT-D pulse generators that support the DF4 connector standard
Sterile, single-use device supplied with stylet and accessories
Clinical Applications
Chronic transvenous right-ventricular sensing and pacing in ICD systems
Delivery of high-voltage defibrillation and cardioversion therapy for ventricular tachyarrhythmias
Use as the RV defibrillation lead component of single-chamber, dual-chamber, or CRT-D ICD systems when paired with a compatible Boston Scientific pulse generator
Suitable for patients indicated for ICD therapy per the implanting clinician's assessment
Product Information
Brand: Boston Scientific
Product Family: RELIANCE 4-FRONT
Model / REF: 651
Category: ICD Leads for Implantable Cardioverter Defibrillators
Connector: DF4-LLHH
Fixation: Active (extendable/retractable helix)
Coil Configuration: Single shock coil
Lead Length: Not specified in the located sources
Lead Body Diameter: Not specified in the located sources
Sterility: Sterile, single use
Indications, contraindications, warnings and detailed specifications: Refer to the official Boston Scientific Instructions for Use (IFU) and product labeling.
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