Thank you @Runjedirun . From trying to google likely prognoses (while waiting for the additional tests), it seems that the amount of time left after a heart failure diagnosis can vary quite a bit. If I'm understanding what I'm reading, it seems she could possibly have even several years more (best case scenario if it progresses slowly). At the other end of possibilities, a heart failure patient is of course also at significantly increased risk for sudden cardiac arrest that is fatal. Will have to wait and see when we get more info.