When does my ICD need to be replaced?

Your ICD batteries, which wear down gradually and predictably, should last several years. Several months before the batteries are expected to expire you will be warned that your pulse generator must be replaced. In an operation much like the original implant, the incision is opened and the pulse generator removed. Since the unit is sealed, the batteries cannot be replaced separately. After testing of the leads, they are reconnected to a new pulse generator and the pocket is closed. Occasionally, the leads also need to be replaced.

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