MAUDE Adverse Event Report: BOSTON SCIENTIFIC CORPORATION ENDOTAK RELIANCE S; implantable lead

Model Number	0138
Medical Device Problem Codes	Device Sensing Problem (2917); Device Dislodged or Dislocated (2923)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	07/29/2026
Type of Reportable Event	Serious Injury
Event or Problem Description
It was reported that the patient with this right ventricular (rv) lead underwent a surgical intervention to reposition the lead as sensing had decreased possibly due to a microdislodgement.The rv lead remains in service.No additional adverse patient effects were reported.

• Brand Name: ENDOTAK RELIANCE S
• 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: timothy degroot ; 4100 hamline avenue north; saint paul, MN 55112 ; +1(651)582-6168
• MDR Report Key: 50287269
• Report Number: 2124215-2026-44101
• Device Sequence Number: 18565431
• Product Code: LWS
• UDI-Device Identifier: 00802526531118
• UDI-Public: (01)00802526531118(17)260405
• Combination Product (Y/N): Y
• Initial Reporter State: MN
• Initial Reporter Country: US
• PMA/510(K) Number: P910073
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2026
• Reporter Type: Manufacturer
• Report Source: Company Representative
• Initial Reporter Occupation: Physician
• Type of Report: Initial
• Report Date (Section B): 08/17/2026

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: 04/05/2026
• Device Model Number: 0138
• Device Catalogue Number: 0138
• Device Lot Number: 307460
• 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: 07/29/2026
• Initial Report FDA Received Date: 08/17/2026
• Date Device Manufactured: 04/05/2024
• 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: 58 YR
• Patient Sex: Male