MAUDE Adverse Event Report: BOSTON SCIENTIFIC CORPORATION ACUITY? X4 Spiral S; Implantable lead

Model Number	4674
Medical Device Problem Codes	Failure to Capture (1081); High Capture Threshold (3266)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	08/13/2026
Type of Reportable Event	Malfunction
Event or Problem Description
It was reported that this cardiac resynchronization therapy defibrillator (crt-d) exhibited high capture thresholds and loss of capture (loc) for its left ventricular (lv) lead.Technical services (ts) was consulted and discussed programming options and settings.This device remains in service.No adverse patient effects were reported.

• Brand Name: ACUITY? X4 Spiral 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; 4100 hamline avenue north; saint paul MN 55112 -579
• Manufacturer Contact: mark mischke ; 4100 hamline avenue north; saint paul, MN 55112 ; +1(651)582-6168
• MDR Report Key: 50601423
• Report Number: 2124215-2026-45727
• Device Sequence Number: 16094575
• Product Code: LWP
• UDI-Device Identifier: 00802526524554
• UDI-Public: (01)00802526524554(17)180907
• Combination Product (Y/N): N
• Initial Reporter State: MN
• 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
• Report Date (Section B): 08/25/2026

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 Expiration Date: 09/07/2018
• Device Model Number: 4674
• Device Catalogue Number: 4674
• Device Lot Number: 603919
• 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: 03/07/2017
• Is the Device Labeled for Single Use? (Y/N): Yes
• Usage of Device: Initial
• Patient Sequence Number: 1
• Patient Age: 86 YR
• Patient Sex: Male