I have an ICD/pacemaker implant and have not really considered that any of my music gear posed any sort of risk. If you are that concerned, I would recommend contacting the manufacturer of your implant to ask if they are aware of any risk. My wife and I have been considering getting an induction cook top, which works by generating a magnetic field that could interfere with a pacemaker. When I asked my doctors about it, I got a lot of conflicting answers. So, I emailed the manufacturer of my implant and actually got a phone call response by a very knowledgable person who was very happy to explain all the concerns and answer all my questions.