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

Model Number U228

Device Problems Failure to Capture (1081); High impedance (1291)

Patient Problem No Code Available (3191)

Event Date 08/15/2020

Event Type  malfunction  

Manufacturer Narrative

(b)(4).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's 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) recorded a high, out-of-range pacing impedance measurement on the left ventricular (lv) lead, resulting in a lead safety switch (lss) that changed the vector from lv ring to can for pacing and lv ring 2 for sensing, to lv tip to can.The vector was programmed back and the lss was turned off.Technical services discussed integrity testing for the lv lead to see if any artifacts could be created, or if the out-of-range impedance measurement could be reproduced.It was noted loss of capture occurred on the lv lead while in the lv tip to can vector, so technical services agreed with turning off lss to ensure capture.A single out-of-range pacing impedance measurement could be an early indicator of lead impairment; therefore, continued monitoring in the remote monitoring system was recommended.

• 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: 10752716
• MDR Text Key: 213653612
• Report Number: 2124215-2020-22306
• Device Sequence Number: 1
• Product Code: NKE
• Combination Product (y/n): N
• Reporter Country Code: FI
• PMA/PMN Number: P030005/S138
• Number of Events Reported: 1
• Summary Report (Y/N): N
• Report Source: Manufacturer
• Source Type: company representative,foreig
• Reporter Occupation: Physician
• Type of Report: Initial
• Report Date: 10/28/2020

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Date FDA Received: 10/28/2020
• Is this an Adverse Event Report?: No
• Is this a Product Problem Report?: Yes
• Device Operator: Lay User/Patient
• Device Expiration Date: 09/04/2021
• Device Model Number: U228
• Device Catalogue Number: U228
• Device Lot Number: 746371
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: Yes
• Date Manufacturer Received: 08/28/2020
• Was Device Evaluated by Manufacturer?: Device Not Returned to Manufacturer
• Date Device Manufactured: 09/27/2019
• Is the Device Single Use?: Yes
• Type of Device Usage: Initial
• Patient Sequence Number: 1