MAUDE Adverse Event Report: BOSTON SCIENTIFIC CORPORATION MOMENTUM? EL ICD DR; Implantable Cardioverter Defibrillator (ICD)

Model Number	D121
Medical Device Problem Codes	Over-Sensing (1438); Pacing Problem (1439)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	08/03/2026
Type of Reportable Event	Malfunction
Event or Problem Description
It was reported that the presenting electrogram (egm) of this implantable cardioverter defibrillator (icd) showed patient experiencing long/short behavior that lead to true ventricular tachycardia (vt) and therapy delivery.The icd also exhibited farfield oversensing.The health care professional (hcp) called technical services (ts) for programming assistance.Ts reviewed the egm and discussed programming optimization recommendations with the hcp.No additional adverse patient effects were reported.This icd remains in service.
Additional Manufacturer Narrative
If pertinent information is provided in the future, a supplemental report will be submitted.

• Brand Name: MOMENTUM? EL ICD DR
• Common Device Name: Implantable Cardioverter Defibrillator (ICD)
• Manufacturer (Section D): BOSTON SCIENTIFIC CORPORATION; 4100 hamline avenue north; saint paul MN 55112
• Manufacturer (Section G): Boston Scientific Corporation; cashel road; clonmel E91 T 862; EI E91 T862
• Manufacturer Contact: mark mischke ; 4100 hamline avenue north; saint paul, MN 55112 ; +1(612)875-7234
• MDR Report Key: 50601333
• Report Number: 2124215-2026-47137
• Device Sequence Number: 16129887
• Product Code: LWS
• UDI-Device Identifier: 00802526587726
• UDI-Public: (01)00802526587726(17)280107
• Combination Product (Y/N): N
• Initial Reporter State: CA
• Initial Reporter Country: US
• PMA/510(K) Number: P960040
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2026
• Reporter Type: Manufacturer
• Report Source: Health Professional
• Initial Reporter Occupation: Other Health Care Professional
• Type of Report: Initial
• Report Date (Section B): 09/03/2026

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 Model Number: D121
• Device Catalogue Number: D121
• Device Lot Number: 251020
• 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: Not provided
• Initial Report FDA Received Date: 09/04/2026
• Date Device Manufactured: 01/20/2026
• 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: 68 YR
• Patient Sex: Male