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

Model Number	4671
Medical Device Problem Code	High Capture Threshold (3266)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	05/22/2026
Type of Reportable Event	Serious Injury
Event or Problem Description
It was reported that the patient exhibited a high left ventricular (lv) pacing threshold.This will be addressed when the system review takes place.No adverse patient effects were reported.Additional information from the field representative indicates that this left ventricular (lv) lead was explanted.A new lead was successfully implanted.No additional adverse patient effects were reported.
Additional Manufacturer Narrative
The product left ventricular (lv) lead was explanted and was not returned; therefore, a technical analysis could not be performed.Based on a thorough review of the reported complaint, boston scientific has assigned an investigation conclusion code of known inherent risk of device.

• 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; 4100 hamline avenue north; saint paul MN 55112 -579
• Manufacturer Contact: mark mischke ; 4100 hamline avenue north; saint paul, MN 55112 ; +1(612)875-7234
• MDR Report Key: 50885203
• Report Number: 2124215-2026-50021
• Device Sequence Number: 10744757
• Product Code: LWP
• UDI-Device Identifier: 00802526524516
• UDI-Public: (01)00802526524516(17)181130
• Combination Product (Y/N): Y
• Initial Reporter State: OH
• Initial Reporter Country: US
• PMA/510(K) Number: P010012
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2017
• Device Explanted Year: 2026
• Reporter Type: Manufacturer
• Report Source: Health Professional,Company Representative
• Initial Reporter Occupation: Other Health Care Professional
• Type of Report: Initial
• Report Date (Section B): 09/24/2026

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: 11/30/2018
• Device Model Number: 4671
• Device Catalogue Number: 4671
• Device Lot Number: 606201
• 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: 09/08/2026
• Initial Report FDA Received Date: 09/24/2026
• Date Device Manufactured: 05/30/2017
• 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: Required Intervention; Hospitalization
• Patient Age: 60 YR
• Patient Sex: Male