MAUDE Adverse Event Report: BOSTON SCIENTIFIC CORPORATION ENERGEN? CRT-D; CARDIAC RESYNCHRONIZATION THERAPY DEFIBRILLATOR (CRT-D)

Model Number	N140
Medical Device Problem Code	High impedance (1291)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	05/27/2017
Type of Reportable Event	Serious Injury
Event or Problem Description
It was reported that this cardiac resynchronization therapy defibrillator (crt-d) and right ventricular (rv) lead exhibited a gradual rise in shock impedance measurements, eventually going out of range.Technical services (ts) suspected calcium build up on the shocking coil.Ts recommended troubleshooting options and replacing the rv lead.Additional information was received from the field that a commanded shock was performed.The rv lead and crt-d have not been explanted.Calcification on the rv lead was not confirmed.No additional adverse patient effects were reported.
Event or Problem Description
It was reported that this cardiac resynchronization therapy defibrillator (crt-d) and right ventricular (rv) lead exhibited a gradual rise in shock impedance measurements, eventually going out of range.Technical services (ts) suspected calcium build up on the shocking coil.Ts recommended troubleshooting options and replacing the rv lead.Additional information was received from the field that a commanded shock was performed.The rv lead and crt-d have not been explanted.Calcification on the rv lead was not confirmed.No additional adverse patient effects were reported.Additional information was received.This crt-d was explanted and replaced.The rv lead remains in service.No additional adverse patient effects were reported.
Additional 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 there was no conclusive evidence that the observed out-of-range impedance measurements were due to a product performance issue or an inadequate lead-to-device connection.However, intermittent, out-of-range shock lead impedance measurements with no conclusive evidence of a performance issue or an inadequate lead-to-device connection are likely the result of the low-energy test signal utilized for daily automatic or in-clinic commanded shock lead impedance testing.A software update was released in 2015 to further improve consistency of the impedance test results and provide the clinician with additional diagnostic tools, including programmable shock lead impedance alert limits.
Event or Problem Description
It was reported that this cardiac resynchronization therapy defibrillator (crt-d) and right ventricular (rv) lead exhibited a gradual rise in shock impedance measurements, eventually going out of range.Technical services (ts) suspected calcium build up on the shocking coil.Ts recommended troubleshooting options and replacing the rv lead.Additional information was received from the field that a commanded shock was performed.The rv lead and crt-d have not been explanted.Calcification on the rv lead was not confirmed.No additional adverse patient effects were reported.Additional information was received.This crt-d was explanted and replaced.The rv lead remains in service.No additional adverse patient effects were reported.

• Brand Name: ENERGEN? CRT-D
• Common Device Name: CARDIAC RESYNCHRONIZATION THERAPY DEFIBRILLATOR (CRT-D)
• 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: 21891109
• Report Number: 2124215-2025-25720
• Device Sequence Number: 12798570
• Product Code: LWP
• UDI-Device Identifier: 00802526480959
• UDI-Public: (01)00802526480959(17)150311
• Combination Product (Y/N): N
• Initial Reporter State: FL
• Initial Reporter Country: US
• PMA/510(K) Number: P010012
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2013
• Device Explanted Year: 2025
• Serviced by Third Party (Y/N): Unknown
• Reporter Type: Manufacturer
• Report Source: Health Professional
• Initial Reporter Occupation: Physician
• Type of Report: Initial,Followup,Followup
• Report Date (Section B): 05/20/2025

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: 03/11/2015
• Device Model Number: N140
• Device Catalogue Number: N140
• Device Lot Number: 108347
• 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: 04/01/2025
• Supplement Date Received by Manufacturer: 04/24/2025; 05/15/2025
• Initial Report FDA Received Date: 04/23/2025
• Supplement Report FDA Received Date: 05/06/2025; 05/20/2025
• Date Device Manufactured: 03/19/2013
• 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: Hospitalization; Required Intervention
• Patient Age: 64 YR
• Patient Sex: Female