I fish with a couple guys that have heart conditions. It is really a life changing situation that needs to be taken very serious. In both cases these guys have “re-structured” their methods.
I’ve always been prepared like the boyscout, having anything with that I might need. These guys have total different mind sets. They go prepared for 1 thing. If they are panfishing, two rods, very minimal tackle, down sized to a 4amp/h battery in their flasher, hand warmers ILO of a heater, and a gator to help keep their breathing warm. If we change species and they need other equipment, they do without.
As mentioned above, the most significant change was their clothing. They invested in ice suits. I don’t recall which brands, but they lightened up their load a lot by how they dress. By getting the best clothing they could, they are much lighter in their travels walking to/from locations. It also eliminated the need for insulated flip overs. Most of the time, its just a matter of having something to block the wind and not needing to be completely enclosed.
Another thing they did was go to a battery drill auger. Eliminated the weight of a gas engine and have 2 batteries in their pocket and a drill in their sled.
Best of luck in your journey, and hope things turn for the best