MAUDE Adverse Event Report: BOSTON SCIENTIFIC CORPORATION The Q-TRAK Subcutaneous Electrode; Implantable Cardioverter Defibrillator (Non-Crt)

Model Number	3400
Medical Device Problem Codes	Over-Sensing (1438); Inappropriate/Inadequate Shock/Stimulation (1574); Failure to Read Input Signal (1581)
Health Effect - Clinical Code	Shock from Patient Lead(s) (3162)
Date of Event	09/23/2026
Type of Reportable Event	Serious Injury
Event or Problem Description
It was reported that the patient had an inappropriate shock.The patient was doing pilates at the time of the shock.The patient has lost a significant amount of weight since the implant back in 2022.An office device check found low intrinsic amplitudes.The sensing vector was then programmed to a new sensing vector.Later, the patient wanted the system explanted due to an improvement in the ejection fraction.The doctor explanted the entire system.There were no additional adverse patient effects.The system remains implanted.

• Brand Name: The Q-TRAK Subcutaneous Electrode
• Common Device Name: Implantable Cardioverter Defibrillator (Non-Crt)
• Manufacturer (Section D): BOSTON SCIENTIFIC CORPORATION; 4100 hamline avenue north; saint paul MN 55112
• Manufacturer (Section G): Boston Scientific Corporation; 229 avenida fabricante; san clemente CA 92672
• Manufacturer Contact: mark mischke ; 4100 hamline avenue north; saint paul, MN 55112 ; +1(612)875-7234
• MDR Report Key: 50949523
• Report Number: 2124215-2026-52055
• Device Sequence Number: 15859068
• Product Code: LWS
• UDI-Device Identifier: 00802526563201
• UDI-Public: (01)00802526563201(17)160801(10)A114845
• Combination Product (Y/N): N
• Initial Reporter State: NJ
• Initial Reporter Country: US
• PMA/510(K) Number: P110042/S000
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2015
• Device Explanted Year: 2026
• Reporter Type: Manufacturer
• Report Source: Health Professional
• Initial Reporter Occupation: Physician
• Type of Report: Initial
• Report Date (Section B): 09/30/2026

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: 08/01/2016
• Device Model Number: 3400
• Device Catalogue Number: 3010
• Device Lot Number: A114845
• 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: 09/23/2026
• Initial Report FDA Received Date: 09/30/2026
• 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
• Outcome Attributed to Adverse Event: Hospitalization
• Patient Age: 68 YR
• Patient Sex: Female