BEUDAMED
    FDA Adverse Event Malfunction Summary report: N

    THE Q-TRAK SUBCUTANEOUS ELECTRODE

    MDR report key: 22318218 · Received June 24, 2025

    Report

    Report Number
    2124215-2025-41533
    Event Type
    Malfunction
    Date Received
    June 24, 2025
    Date of Event
    April 1, 2010
    Report Date
    June 24, 2025
    Manufacturer
    BOSTON SCIENTIFIC CORPORATION
    Product Code
    LWS
    Product Problem
    Yes
    Report Source
    Manufacturer report
    Reporter Location
    GA, US
    Reporter Occupation
    PHYSICIAN
    Health Professional
    Yes

    Narratives

    Additional Manufacturer Narrative · 0

    M. F. EL-CHAMI, B. HARBIEH, M. LEVY, A. R. LEON, AND F. M. MERCHANT, CLINICAL AND ELECTROCARDIOGRAPHIC PREDICTORS OF T WAVE OVERSENSING IN PATIENTS WITH SUBCUTANEOUS ICD, JOURNAL OF ARRHYTHMIA 32 (2016): 181-185.

    Description of Event or Problem · 0

    IT WAS REPORTED PER ARTICLE OF INTEREST LITERATURE REVIEW THAT THE AUTHORS SOUGHT IDENTIFY CLINICAL AND ELECTROCARDIOGRAPHIC PREDICTORS OF T-WAVE OVERSENSING (TWOS) IN A COHORT OF PATIENTS UNDERGOING SUBCUTANEOUS IMPLANTABLE CARDIOVERTER DEFIBRILLATOR (S-ICD). THEY RETROSPECTIVELY IDENTIFIED ALL PATIENTS WHO UNDERWENT S-ICD IMPLANTATION (CAMERON HEALTH MODEL NUMBER 1010 SQ-RX, WITH A SUBCUTANEOUS LEAD-CAMERON HEALTH MODEL 3010) AT THEIR INSTITUTION FROM APRIL 2010 TO JANUARY 2015. NINETY-TWO PATIENTS UNDERWENT S-ICD IMPLANTATION. DURING A MEAN FOLLOW-UP OF 13.1 MONTHS, SIX PATIENTS HAD TWOS RESULTING IN INAPPROPRIATE SHOCKS. IN THE GROUP WITHOUT TWOS, TWO PATIENTS EXPERIENCED INAPPROPRIATE SHOCKS FOR NON-TWOS ETIOLOGIES: ONE FOR SUPRAVENTRICULAR RHYTHM AND ONE FOR ELECTROMAGNETIC INTERFERENCE. CASE 2: A 23-YEAR-OLD MALE COLLEGIATE BASKETBALL PLAYER EXPERIENCED CARDIAC ARREST DURING A GAME AND WAS RESCUED WITH AN AUTOMATED EXTERNAL DEFIBRILLATOR. HE WAS DIAGNOSED WITH IDIOPATHIC VENTRICULAR FIBRILLATION AFTER EXTENSIVE TESTING. TWO MONTHS AFTER IMPLANTATION HE EXPERIENCED AN INAPPROPRIATE SHOCK FOR TWOS. AN EXERCISE TREADMILL TEST (ETT) WAS PERFORMED WITH ACQUISITION OF A NEW TEMPLATE, AND THE SENSING VECTOR WAS CHANGED FROM PRIMARY TO SECONDARY FOR BETTER DISCRIMINATION OF T-WAVES DURING ACTIVITY. HE HAS HAD NO FURTHER INAPPROPRIATE THERAPIES IN THE 27 MONTHS SINCE THEN. THE S-ICD SYSTEM REMAINS IN SERVICE. NO ADVERSE PATIENT EFFECTS WERE REPORTED.

    Devices

    Seq Brand Generic Product Code Manufacturer Model Lot UDI-DI
    1999078 THE Q-TRAK SUBCUTANEOUS ELECTRODE IMPLANTABLE LEAD LWS BOSTON SCIENTIFIC CORPORATION 3010

    Patients

    Seq Age Sex Outcome Treatment
    1 23 YR Male