MAUDE Adverse Event Report: BOSTON SCIENTIFIC CORPORATION INOGEN? X4 CRT-D; Cardiac Resynchronization Therapy Defibrillator

Model Number	G148
Medical Device Problem Codes	Pacing Problem (1439); Defibrillation/Stimulation Problem (1573); Inappropriate/Inadequate Shock/Stimulation (1574)
Health Effect - Clinical Codes	Tachycardia (2095); Shock from Patient Lead(s) (3162)
Date of Event	06/13/2026
Type of Reportable Event	Serious Injury
Additional Manufacturer Narrative
This product investigation is still in progress.This report will be updated when product investigation is complete.
Event or Problem Description
It was reported that this cardiac resynchronization therapy defibrillator (crt-d) delivered inappropriate therapy due to an atrial driven event.The device delivered one electric shock and three bursts of anti-tachycardia pacing (atp).Additionally, it was noted that once atp was delivered, the rhythm accelerated into a ventricular tachycardia (vt).Subsequently, an electric shock was delivered and converted the rhythm.No additional adverse patient effects were reported.This device remains in service.

• Brand Name: INOGEN? X4 CRT-D
• Common Device Name: Cardiac Resynchronization Therapy Defibrillator
• Manufacturer (Section D): BOSTON SCIENTIFIC CORPORATION; 4100 hamline avenue north; saint paul MN 55112
• Manufacturer (Section G): Boston Scientific Corporation; cashel road; clonmel PR ; PR
• Manufacturer Contact: mark mischke ; 4100 hamline avenue north; saint paul, MN 55112 ; +1(612)875-7234
• MDR Report Key: 25740436
• Report Number: 2124215-2026-36439
• Device Sequence Number: 10553781
• Product Code: NIK
• UDI-Device Identifier: 00802526534591
• UDI-Public: (01)00802526534591(17)191019
• Combination Product (Y/N): N
• Initial Reporter State: TX
• Initial Reporter Country: US
• PMA/510(K) Number: P010012
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2017
• Reporter Type: Manufacturer
• Report Source: Health Professional
• Initial Reporter Occupation: Physician
• Type of Report: Initial,Followup
• Report Date (Section B): 09/09/2026

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: 10/19/2019
• Device Model Number: G148
• Device Catalogue Number: G148
• Device Lot Number: 180858
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: Yes
• Was the Report Sent to FDA?: No
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 06/16/2026
• Supplement Date Received by Manufacturer: 09/07/2026
• Initial Report FDA Received Date: 07/07/2026
• Supplement Report FDA Received Date: 09/09/2026
• Date Device Manufactured: 11/07/2017
• 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: Other
• Patient Age: 71 YR
• Patient Sex: Male