The Boston Scientific RELIANCE 4-FRONT DF4 ICD Defibrillation Lead (REF 652) is a transvenous defibrillation lead designed for use with compatible implantable cardioverter defibrillators (ICDs) and CRT-D systems. It uses the DF4-LLHH connector standard to consolidate pace/sense and high-voltage connections into a single in-line terminal pin, simplifying header connections during device implant or replacement procedures.

Key Features
Single DF4-LLHH in-line connector that integrates pace/sense and defibrillation conductors into one terminal pin.
RELIANCE 4-FRONT lead platform engineered by Boston Scientific for transvenous right ventricular placement.
Dual shocking coil configuration intended to deliver high-voltage defibrillation therapy when paired with a compatible ICD/CRT-D pulse generator.
Designed for compatibility with Boston Scientific DF4-header ICD and CRT-D devices.
Sterile, single-use device supplied with associated implant accessories as packaged by the manufacturer.

Clinical Applications
Intended for use as the high-voltage lead component of an implantable cardioverter defibrillator system in patients prescribed ICD or CRT-D therapy by a qualified physician.
Supports sensing, pacing, and delivery of defibrillation shocks via the right ventricle as part of a complete ICD system.
For use only by trained cardiac electrophysiology and implant teams in accordance with the manufacturer's Instructions for Use (IFU).

Product Information
Brand: Boston Scientific
Product Family: RELIANCE 4-FRONT
Model / REF: 652
Category: ICD Leads for Implantable Cardioverter Defibrillators
Connector: DF4-LLHH
Lead Type: Transvenous defibrillation lead with high-voltage shocking coil(s)
Lead Length: Not specified in the located sources
Fixation Type: Not specified in the located sources
Sterility: Sterile, single-use
Storage: Refer to manufacturer IFU
Regulatory Status: Refer to manufacturer labeling for region-specific clearances and approvals