This morning my partner will be going to hospital for a routine procedure to replace her pacemaker battery. In fact the whole pacemaker is replaced. The procedure is non-evasive and carries next to no risk, but as in all procedures there is always that tiny percentage of risk.
All going well, she will back home the same day after which she will need to avoid any physical exertion for a week or so to make sure that the apparatus has properly settled in place.