MAUDE Adverse Event Report: BOSTON SCIENTIFIC CORPORATION ACUITY X4 Straight; Implantable lead

Model Number	4672
Medical Device Problem Code	High Capture Threshold (3266)
Health Effect - Clinical Code	Device Overstimulation of Tissue (1991)
Date of Event	05/18/2026
Type of Reportable Event	Malfunction
Event or Problem Description
It was reported that this brady lead was a case of an attempted implant due to no acceptable threshold measurements and in one location diaphragmatic stimulation was unavoidable.This brady lead was replaced with different model, not implanted and was returned for analysis.No adverse patient effects were reported.

• Brand Name: ACUITY X4 Straight
• 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: mark mischke ; 4100 hamline avenue north; saint paul, MN 55112 ; +1(612)875-7234
• MDR Report Key: 25452716
• Report Number: 2124215-2026-30897
• Device Sequence Number: 10409777
• Product Code: LWP
• UDI-Device Identifier: 00802526524530
• UDI-Public: (01)00802526524530(17)270619
• Combination Product (Y/N): Y
• Initial Reporter State: MO
• Initial Reporter Country: US
• PMA/510(K) Number: P010012
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2026
• Device Explanted Year: 2026
• Reporter Type: Manufacturer
• Report Source: Health Professional,Company Representative
• Initial Reporter Occupation: Physician
• Type of Report: Initial,Followup
• Report Date (Section B): 09/14/2026

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: Health Professional
• Device Model Number: 4672
• Device Catalogue Number: 4672
• Device Lot Number: 829172
• Was Device Available for Evaluation?: Yes
• Date Returned to Manufacturer: 05/28/2026
• 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: 05/18/2026
• Supplement Date Received by Manufacturer: 09/02/2026
• Initial Report FDA Received Date: 06/10/2026
• Supplement Report FDA Received Date: 09/14/2026
• Date Device Manufactured: 06/19/2025
• 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: 87 YR
• Patient Sex: Female