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

Model Number	4457
Medical Device Problem Codes	Failure to Capture (1081); High impedance (1291); High Capture Threshold (3266)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	03/05/2026
Type of Reportable Event	Malfunction
Additional Manufacturer Narrative
This device remains in service; 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 known inherent risk of device.
Event or Problem Description
It was reported that this pacemaker system triggered a lead safety switch (lss) due to high out of range pacing impedance measurements greater than 3000 ohms in the right ventricular (rv) channel.Technical services (ts) was contacted and noted high capture thresholds and loss of capture (loc).This rv 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): CPI - DEL CARIBE; guidant puerto rico b. v.; #12, rd. #698; dorado PR 00646
• Manufacturer Contact: timothy degroot ; 4100 hamline avenue north; saint paul, MN 55112 ; 6515826168
• MDR Report Key: 24624283
• Report Number: 2124215-2026-14844
• Device Sequence Number: 8596281
• Product Code: DTB
• UDI-Device Identifier: 00802526060915
• UDI-Public: (01)00802526060915(17)030217
• Combination Product (Y/N): Y
• Initial Reporter State: CA
• Initial Reporter Country: US
• PMA/510(K) Number: P960004
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2001
• Serviced by Third Party (Y/N): Unknown
• Reporter Type: Manufacturer
• Report Source: Health Professional
• Initial Reporter Occupation: Physician
• Type of Report: Initial
• Report Date (Section B): 03/17/2026

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: 02/17/2003
• Device Model Number: 4457
• Device Catalogue Number: 4457
• 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: 03/05/2026
• Initial Report FDA Received Date: 03/17/2026
• Date Device Manufactured: 02/17/2001
• 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: 84 YR
• Patient Sex: Male