MAUDE Adverse Event Report: BOSTON SCIENTIFIC CORPORATION FINELINE II EZ Sterox; Implantable Lead

Model Number	4473
Medical Device Problem Code	High Capture Threshold (3266)
Health Effect - Clinical Code	Fibrosis (3167)
Date of Event	09/03/2026
Type of Reportable Event	Serious Injury
Event or Problem Description
It was reported that this right ventricular (rv) lead exhibited high pacing thresholds.The physician believed cause to be due to fibrosis at lead tip due to age of the lead.A revision procedure was performed.This rv lead was surgically abandoned and replaced with a new lead successfully.No additional adverse patient effects were reported.
Additional Manufacturer Narrative
If pertinent information is provided in the future, a supplemental report will be submitted.

• Brand Name: FINELINE II EZ 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: mark mischke ; 4100 hamline avenue north; saint paul, MN 55112 ; +1(612)875-7234
• MDR Report Key: 50927560
• Report Number: 2124215-2026-51598
• Device Sequence Number: 10725788
• Product Code: DTB
• UDI-Device Identifier: 00802526265020
• UDI-Public: (01)00802526265020(17)060921
• Combination Product (Y/N): Y
• Initial Reporter State: PA
• Initial Reporter Country: US
• PMA/510(K) Number: P960004
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2004
• Reporter Type: Manufacturer
• Report Source: Health Professional,Company Representative
• Initial Reporter Occupation: Physician
• Type of Report: Initial
• Report Date (Section B): 09/29/2026

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Is this an Adverse Event Report?: Yes
• Is this a Product Problem Report?: Yes
• Operator of Device: Lay User/Patient
• Device Expiration Date: 09/21/2006
• Device Model Number: 4473
• Device Catalogue Number: 4473
• 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: 09/03/2026
• Initial Report FDA Received Date: 09/29/2026
• Date Device Manufactured: 09/21/2004
• 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
• Outcome Attributed to Adverse Event: Required Intervention; Hospitalization
• Patient Sex: Male