MAUDE Adverse Event Report: BOSTON SCIENTIFIC CORPORATION VISIONIST X4 CRT-P; PULSE GENERATOR, PACEMAKER, IMPLANTABLE, WITH CARDIAC RESYNCHRONIZATION (CRT-P)

Model Number U228

Device Problem High impedance (1291)

Patient Problem No Clinical Signs, Symptoms or Conditions (4582)

Event Date 02/18/2021

Event Type  malfunction  

Manufacturer Narrative

This product has not been returned to boston scientific, and as a result, laboratory analysis could not be conducted.The associated investigation determined that this device exhibited intermittent impedance measurements with no conclusive evidence of a malfunction or inadequate lead-to-device connection; please refer to the description for more information regarding the specific circumstances of this event.Investigation has determined that this type of event is likely the result of an intermittent high impedance condition associated with the device spring contact and lead terminal ring.A design enhancement was implemented in 2020 to stabilize the electrical connection between the spring contact and the lead terminal.

Event Description

It was reported that this cardiac resynchronization therapy pacemaker (crt-p) and left ventricular (lv) lead exhibited increasing impedance measurements until it triggered a lead safety switch (lss) due to a high out-of-range lv pace impedance measurement of 2021 ohms.It was noted that the presenting electrogram (egm) appeared similar to the previous presenting egm, but now lv pacing is in unipolar.Technical services (ts) discussed possible options including reprogramming, assessing other vectors, and increasing the lv impedance alert value.This crt-p and the leads remain in service at this time.No adverse patient effects were reported.

• Brand Name: VISIONIST X4 CRT-P
• Type of Device: PULSE GENERATOR, PACEMAKER, IMPLANTABLE, WITH CARDIAC RESYNCHRONIZATION (CRT-P)
• Manufacturer (Section D): BOSTON SCIENTIFIC CORPORATION; 4100 hamline avenue north; saint paul MN 55112
• Manufacturer (Section G): BOSTON SCIENTIFIC CORPORATION; cashel road; clonmel ; EI
• Manufacturer Contact: timothy degroot ; 4100 hamline avenue north; saint paul, MN 55112 ; 6515826168
• MDR Report Key: 11676361
• MDR Text Key: 245754218
• Report Number: 2124215-2021-08670
• Device Sequence Number: 1
• Product Code: NKE
• UDI-Device Identifier: 00802526559471
• UDI-Public: 00802526559471
• Combination Product (y/n): N
• Reporter Country Code: US
• PMA/PMN Number: P030005/S138
• Number of Events Reported: 1
• Summary Report (Y/N): N
• Report Source: Manufacturer
• Source Type: health professional
• Reporter Occupation: Other Health Care Professional
• Type of Report: Initial
• Report Date: 04/15/2021

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
• Device Operator: Lay User/Patient
• Device Expiration Date: 12/05/2021
• Device Model Number: U228
• Device Catalogue Number: U228
• Device Lot Number: 748993
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: Yes
• Initial Date Manufacturer Received: 02/19/2021
• Initial Date FDA Received: 04/15/2021
• Was Device Evaluated by Manufacturer?: Device Not Returned to Manufacturer
• Date Device Manufactured: 12/19/2019
• Is the Device Single Use?: Yes
• Is This a Reprocessed and Reused Single-Use Device?: No
• Type of Device Usage: Initial
• Patient Sequence Number: 1
• Patient Age: 71 YR