Diagnosed with CHF three years ago. I never experience SOB but lately wonder about something else. I swim laps three times weekly, and sometimes my fingers and hands begin feeling numb. If I slow down a bit, stop for a few seconds after 10 lengths, say, it begins to go away. Or at least eases up a bit. I am 80, never smoked, drink very lightly. I have Menieres, osteoporosis, have always been active. For 80 I am pretty active.