The Boston Scientific FINELINE II Sterox Pacing Lead (REF 4458) is a transvenous endocardial pacing lead designed for chronic atrial or ventricular stimulation and sensing in conjunction with a compatible implantable pulse generator. The FINELINE II family is engineered with a steroid-eluting electrode intended to help mitigate acute inflammatory response at the lead-tissue interface and support stable chronic pacing thresholds.

Key Features
- Steroid-eluting tip (Sterox) intended to support low chronic pacing thresholds
- Bipolar lead configuration for stimulation and sensing
- Silicone and/or polyurethane insulation per manufacturer construction
- IS-1 BI compatible connector for use with compatible pulse generators
- Designed for transvenous endocardial placement
- Stylet-driven delivery for controlled positioning
- Fixation mechanism: Not specified in the located sources

Clinical Applications
- Chronic cardiac pacing and sensing in bradyarrhythmia management
- Use with compatible single- or dual-chamber pacemakers
- Endocardial atrial or ventricular implantation as determined by the implanting physician
- Suitable patient selection and chamber-specific use should follow the manufacturer's Instructions for Use

Product Information
Brand: Boston Scientific
Product Line: FINELINE II Sterox
Category: Pacemaker Leads
REF/UPN: 4458
Connector: IS-1 BI (per FINELINE II family)
Configuration: Bipolar
Electrode: Steroid-eluting (Sterox)
Lead Length: Not specified in the located sources
Fixation Type: Not specified in the located sources
Sterility: Supplied sterile for single use
Storage: Refer to manufacturer IFU
Buyers should verify model-specific specifications, regional regulatory status and compatibility against the official Boston Scientific Instructions for Use prior to procurement.