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    Information Update - Premature battery depletion with certain St. Jude Medical implantable defibrillators

    October 15, 2016

    Health Canada is advising Canadians that some batteries in implantable cardioverter defibrillators (ICD) and cardiac resynchronization therapy devices (CRT-D) manufactured by St. Jude Medical may deplete earlier than expected. Early battery depletion may occur suddenly, anywhere between hours and days, and without warning.

    According to the company, the chance of early battery depletion is small and appears to occur two to three years after implantation. Devices manufactured after May 23, 2015, are not affected by this issue.

    The following devices are affected:

    Fortify Assura DR
    Fortify Assura VR
    Fortify DR
    Fortify ST DR
    Fortify ST VR
    Fortify VR
    Quadra Assura
    Quadra Assura MP
    Unify Assura
    Unify
    Unify Quadra CRT-D

    Health Canada is urging patients with any of these devices to immediately contact the clinic responsible for their follow-up care for information and advice. Physicians can identify premature battery depletion through remote monitoring or in-person visits.

    St. Jude Medical has informed physicians and hospital administrators of this issue, including advising them not to use affected products in storage. The Canadian Heart Rhythm Society will also provide information to clinics, including a procedure for patient monitoring and follow-up.

    Incidents have been reported in Canada associated with early battery depletion. In most cases, battery depletion was discovered during routine follow-up medical visits without any reported symptoms. However, in two cases, patients reported symptoms such as loss of consciousness necessitating CPR, shortness of breath and fatigue. There are no known deaths related to this problem in Canada. Internationally, there have been two deaths and ten serious events (e.g., fainting, chest pain) possibly associated with this issue.

    An ICD is a microcomputer that is implanted under the skin of the upper chest area. It monitors heart rate and delivers therapy in the form of small electrical pulses. A CRT-D is a type of specialized ICD used to treat heart failure.

    What you should do:

    - Contact the clinic responsible for your follow-up and care if you have an affected defibrillator.
    - Monitor for any vibratory (vibrating) patient alerts as these may be the result of your device reaching the Elective Replacement Indicator (or ERI, the notification that the device should be replaced within three months).
    - If you do not already use remote monitoring for your device, contact your follow-up clinic to discuss the possibility of using Merlin@Home, St. Jude Medical's remote monitoring system.
    - Report complaints about health products to Health Canada by calling toll-free to 1‑800‑267-9675, or complete an online complaint form.

    Health Canada

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