MAUDE Adverse Event Report: BOSTON SCIENTIFIC CORPORATION FINELINE II STEROX; IMPLANTABLE LEAD

Model Number	4456
Medical Device Problem Codes	High impedance (1291); Material Integrity Problem (2978)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	11/26/2025
Type of Reportable Event	Malfunction
Additional Manufacturer Narrative
The device was not returned for analysis; therefore, a technical analysis could not be performed.Based on a thorough review of the reported complaint, boston scientific has assigned an investigation conclusion code of unable to exclude device problem.
Event or Problem Description
It was reported that this right ventricular (rv) lead exhibited high out of range impedance >3000 ohms maybe due to lead mechanical impairment issue and the pacing therapy could be compromised.This lead remains in service.No adverse patient effects were reported.
Event or Problem Description
It was reported that this right ventricular (rv) lead exhibited high out of range impedance >3000 ohms maybe due to lead mechanical impairment issue and the pacing therapy could be compromised.This lead remains in service.No adverse patient effects were reported.

• Brand Name: FINELINE II STEROX
• Common Device Name: IMPLANTABLE LEAD
• Manufacturer (Section D): BOSTON SCIENTIFIC CORPORATION; 4100 hamline avenue north; saint paul MN 55112
• Manufacturer (Section G): BOSTON SCIENTIFIC CORPORATION; road 698, lot no. 12; dorado PR 00646 -260; * 00646-2602
• Manufacturer Contact: timothy degroot ; 4100 hamline avenue north; saint paul, MN 55112 ; 6515826168
• MDR Report Key: 23839687
• Report Number: 2124215-2025-91736
• Device Sequence Number: 9959343
• Product Code: DTB
• UDI-Device Identifier: 00802526087752
• UDI-Public: (01)00802526087752(17)220114
• Combination Product (Y/N): Y
• Initial Reporter State: TX
• Initial Reporter Country: US
• PMA/510(K) Number: P960004
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2020
• Serviced by Third Party (Y/N): Unknown
• Reporter Type: Manufacturer
• Report Source: Health Professional,Company Representative
• Initial Reporter Occupation: Physician
• Type of Report: Initial,Followup
• Report Date (Section B): 03/20/2026

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Is this an Adverse Event Report?: No
• Is this a Product Problem Report?: Yes
• Operator of Device: Lay User/Patient
• Device Expiration Date: 01/14/2022
• Device Model Number: 4456
• Device Catalogue Number: 4456
• Device Lot Number: 543035
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: Yes
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 11/26/2025
• Supplement Date Received by Manufacturer: 03/05/2026
• Initial Report FDA Received Date: 12/18/2025
• Supplement Report FDA Received Date: 03/20/2026
• Date Device Manufactured: 01/14/2020
• Is the Device Labeled for Single Use? (Y/N): Yes
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Usage of Device: Initial
• Patient Sequence Number: 1
• Patient Age: 83 YR
• Patient Sex: Female