MAUDE Adverse Event Report: BOSTON SCIENTIFIC CORPORATION DYNAGEN? MINI ICD DR; IMPLANTABLE CARDIOVERTER DEFIBRILLATOR (ICD)

Model Number	D023
Medical Device Problem Code	High impedance (1291)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	10/15/2024
Type of Reportable Event	Malfunction
Additional Manufacturer Narrative
If pertinent information is provided in the future, a supplemental report will be submitted.
Event or Problem Description
It was reported that this implantable cardioverter defibrillator (icd) exhibited intermittent high out of range right ventricular (rv) lead impedances above 3000 ohms for the last year.There was no noise observed.Technical services (ts) was consulted to check if it was possible to perform a magnetic resonance imaging (mri); however, further guidance was provided to consult with the physician.This device remains in-service at this time.No adverse patient events were reported.
Additional Manufacturer Narrative
If pertinent information is provided in the future, a supplemental report will be submitted.
Event or Problem Description
It was reported that this implantable cardioverter defibrillator (icd) exhibited intermittent high out of range right ventricular (rv) lead impedances above 3000 ohms for the last year.There was no noise observed.Technical services (ts) was consulted to check if it was possible to perform a magnetic resonance imaging (mri); however, further guidance was provided to consult with the physician.This device remains in-service at this time.No adverse patient events were reported.Additional information was received stating that further evaluation had been conducted.High out of range pacing impedances with values greater than 3000ohms to 800ohms were noted in the stored data; however, impedances were noted to be stable during in clinic evaluation along with thresholds and sensing.Furthermore, no noise was reproduced.This device remains in-service at this time.No adverse patient events were reported.
Event or Problem Description
It was reported that this implantable cardioverter defibrillator (icd) exhibited intermittent high out of range right ventricular (rv) lead impedances above 3000 ohms for the last year.There was no noise observed.Technical services (ts) was consulted to check if it was possible to perform a magnetic resonance imaging (mri); however, further guidance was provided to consult with the physician.This device remains in-service at this time.No adverse patient events were reported.Additional information was received stating that further evaluation had been conducted.High out of range pacing impedances with values greater than 3000ohms to 800ohms were noted in the stored data; however, impedances were noted to be stable during in clinic evaluation along with thresholds and sensing.Furthermore, no noise was reproduced.This device remains in-service at this time.No adverse patient events 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 this device exhibited intermittent changes in impedance measurements with no conclusive evidence of a product performance issue or inadequate lead-to-device connection; please refer to the description for more information regarding the specific circumstances of this event.Engineering analysis and testing of returned products has determined that repeated, small movements of the lead terminal ring along with variances in the connection contact force and surface roughness can impact the connection between the spring contact and the lead ring, resulting in intermittent changes in impedance measurement.

• Brand Name: DYNAGEN? MINI ICD DR
• Common Device Name: IMPLANTABLE CARDIOVERTER DEFIBRILLATOR (ICD)
• 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: 23479028
• Report Number: 2124215-2025-79898
• Device Sequence Number: 10228786
• Product Code: LWS
• UDI-Device Identifier: 00802526533921
• UDI-Public: (01)00802526533921(17)240901
• Combination Product (Y/N): N
• Initial Reporter State: AZ
• Initial Reporter Country: US
• PMA/510(K) Number: P960040
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2022
• Serviced by Third Party (Y/N): Unknown
• Reporter Type: Manufacturer
• Report Source: Health Professional
• Initial Reporter Occupation: Other Health Care Professional
• Type of Report: Initial,Followup,Followup
• Report Date (Section B): 02/03/2026

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
• Operator of Device: Lay User/Patient
• Device Expiration Date: 09/01/2024
• Device Model Number: D023
• Device Catalogue Number: D023
• Device Lot Number: 255776
• 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: 10/17/2025
• Supplement Date Received by Manufacturer: 01/13/2026; 02/02/2026
• Initial Report FDA Received Date: 11/05/2025
• Supplement Report FDA Received Date: 01/23/2026; 02/03/2026
• Date Device Manufactured: 09/16/2022
• 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
• Patient Age: 75 YR
• Patient Sex: Female