MAUDE Adverse Event Report: BIOSENSE WEBSTER INC EZ STEER NAV; ELECTRODE, PERCUTANEOUS, CONDUCTION TISSUE ABLATION

Catalog Number	BN7TCFJ4L
Medical Device Problem Code	Patient Device Interaction Problem (4001)
Health Effect - Clinical Code	Heart Block (4444)
Date of Event	03/18/2026
Type of Reportable Event	Serious Injury
Event or Problem Description
It was reported that a patient underwent an supraventricular tachycardia (svt) ablation procedure with an ez steer nav catheter and the patient experienced heart block that required a pacemaker implantation.They planned to ablate the slow pathway with a 4 mm catheter.After 20 seconds of ablation, the patient went into av block.Subsequently, the patient received a pacemaker.The patient did not require extended hospitalization.The physician's opinion on the cause of the adverse event was inadvertent ablation of the av node.The patient¿s outcome was reported to be stable with the pacemaker.
Additional Manufacturer Narrative
Device investigation details: an analysis of the product could not be performed since a physical sample was not received for evaluation.An evaluation of the manufacturing record could not be performed as the required product identification number was not provided to complete the evaluation.However, if the product is received at a later date, the investigation will be updated as applicable.As part of our company quality system process, all devices are manufactured, inspected, and distributed to approved specifications.Note: for field d4: udi: as the lot number for the device involved in the event was not provided, the full udi is currently not available.This report is being submitted pursuant to the provisions of 21 cfr, part 803.This report may be based on information which has not been investigated or verified prior to the required reporting date.This report does not reflect a conclusion by biosense webster inc., or its employees that the report constitutes an admission that the product, biosense webster inc., or its employees caused or contributed to the potential event described in this report.If information is obtained that was not available for the initial report, a follow-up report will be filed as appropriate.Manufacturer's ref.# (b)(4).

• Brand Name: EZ STEER NAV
• Common Device Name: ELECTRODE, PERCUTANEOUS, CONDUCTION TISSUE ABLATION
• Manufacturer (Section D): BIOSENSE WEBSTER INC; 31 technology drive, suite 200; irvine CA 92618
• Manufacturer (Section G): BIOSENSE WEBSTER (ISRAEL) LTD.; 4 hatnufah street; yokneam 20667 17; IS 2066717
• Manufacturer Contact: henry boden ; 31 technology dr; irvine, CA 92618 ; 9497882078
• MDR Report Key: 24873510
• Report Number: 2029046-2026-01203
• Device Sequence Number: 9331819
• Product Code: LPB
• UDI-Device Identifier: 10846835003031
• UDI-Public: (01)10846835003031
• Combination Product (Y/N): N
• Initial Reporter Country: US
• PMA/510(K) Number: P990025/S12
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): Unknown
• Reporter Type: Manufacturer
• Report Source: Health Professional,Company Representative
• Initial Reporter Occupation: Other
• Type of Report: Initial

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?: No
• Operator of Device: Health Professional
• Device Catalogue Number: BN7TCFJ4L
• Was Device Available for Evaluation?: No
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 03/18/2026
• Initial Report FDA Received Date: 04/14/2026
• Was Device Evaluated by Manufacturer? (Y/N): No
• 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
• Patient Age: 62 YR
• Patient Sex: Female