MAUDE Adverse Event Report: BOSTON SCIENTIFIC CORPORATION RELIANCE 4-FRONT?; Implantable Lead

Model Number	0673
Medical Device Problem Codes	Device Dislodged or Dislocated (2923); Insufficient Device Problem Information (3190); High Capture Threshold (3266)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	09/01/2026
Type of Reportable Event	Serious Injury
Event or Problem Description
It was reported that this right ventricular (rv) lead was explanted due to an unknown product anomaly.A new lead was implanted.No additional adverse patient effects were reported.This rv lead remains in service.
Event or Problem Description
It was reported that this right ventricular (rv) lead was explanted due to an unknown product anomaly.A new lead was implanted.No additional adverse patient effects were reported.This rv lead is no longer in service.Additional information was received that the rv lead exhibited a high threshold measurement likely due to a micro dislodgement.No adverse patient effects were reported.This rv lead is no longer in service.
Additional Manufacturer Narrative
This product investigation is still in progress.This report will be updated when product investigation is complete.If pertinent information is provided in the future, a supplemental report will be submitted.
Additional Manufacturer Narrative
This product investigation is still in progress.This report will be updated when product investigation is complete.If pertinent information is provided in the future, a supplemental report will be submitted.

• Brand Name: RELIANCE 4-FRONT?
• 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; PR 00646-2602
• Manufacturer Contact: mark mischke ; 4100 hamline avenue north; saint paul, MN 55112 ; +1(612)875-7234
• MDR Report Key: 50754169
• Report Number: 2124215-2026-48888
• Device Sequence Number: 15740397
• Product Code: NVY
• UDI-Device Identifier: 00802526592867
• UDI-Public: (01)00802526592867(17)270925
• Combination Product (Y/N): Y
• Initial Reporter State: IL
• Initial Reporter Country: US
• PMA/510(K) Number: P910073
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2025
• Device Explanted Year: 2026
• Reporter Type: Manufacturer
• Report Source: Health Professional
• Initial Reporter Occupation: Physician
• Type of Report: Initial,Followup
• Report Date (Section B): 09/15/2026

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 Model Number: 0673
• Device Catalogue Number: 0673
• Device Lot Number: 287573
• 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: 09/01/2026
• Supplement Date Received by Manufacturer: 09/15/2026
• Initial Report FDA Received Date: 09/14/2026
• Supplement Report FDA Received Date: 09/15/2026
• Date Device Manufactured: 09/25/2025
• 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: Hospitalization; Required Intervention
• Patient Age: 81 YR
• Patient Sex: Male