The link below starts off with a slide that shows just some of the current implantable electrical medical devices. The second link is just another example of an additional type of implantable electrical medical device.

The market for these devices is not something that will ever contract in its use as every year provides more windows to an expanding future of implantable electric devices into the human body.

https://groups.csail.mit.edu/netmit/IMDShield/images/WIMD.png

https://www.usaspinecare.com/wp-content/uploads/2021/01/004.jpg

There are a seemingly inexhaustable number of commercial market forecasts concerning the future of the industry developed around this cornucopia of implantable electrical medical devices.... alll of which require the purchase of the full forecast at a considerable price.  Just the description alone of one of these forecasts fully illuminates the potential of this market... and for this description you don't have to fork over any $:

https://www.marketdataforecast.com/market-reports/active-implantable-medical-devices-market