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

Model Number	4677
Medical Device Problem Code	High impedance (1291)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	07/22/2026
Type of Reportable Event	Malfunction
Event or Problem Description
It was reported that this cardiac resynchronization therapy pacemaker (crt-p) exhibited high out of range pacing impedance measurements for its left ventricular (lv) lead, which resulted in its lead safety switch (lss) to be activated.Technical services (ts) was consulted and discussed stored data, with the latest data indicating the pacing impedance measurements back in range and all other measurements were within range.This device remains in service.No adverse patient effects were reported.

• Brand Name: ACUITY? X4 Spiral L
• 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: 50197008
• Report Number: 2124215-2026-42698
• Device Sequence Number: 10336803
• Product Code: LWP
• UDI-Device Identifier: 00802526524592
• UDI-Public: (01)00802526524592(17)270113
• Combination Product (Y/N): N
• Initial Reporter State: MI
• Initial Reporter Country: US
• PMA/510(K) Number: P010012
• 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): 08/10/2026

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: 4677
• Device Catalogue Number: 4677
• Device Lot Number: 844869
• 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: 07/30/2026
• Initial Report FDA Received Date: 08/10/2026
• Date Device Manufactured: 01/13/2025
• Is the Device Labeled for Single Use? (Y/N): Yes
• Usage of Device: Initial
• Patient Sequence Number: 1
• Patient Age: 81 YR
• Patient Sex: Male