Pacemakers and other implanted electronic devices are not generally expected to directly interfere with the Polar band used with Visible.
However, Polar has not specifically tested compatibility with pacemakers or ICDs, so we cannot guarantee accurate heart rate or HRV readings for everyone in these circumstances.
A pacemaker or other heart condition may affect the natural changes in heart rhythm that HRV readings rely on. If you have any doubts, or feel anything unusual while using the band, please speak with your doctor or the manufacturer of your implanted device.