I have two holes in my heart and a prolapsed mitro valve. Recently due to swelling in my legs and feet I was put on lasix which resolved the swelling. I was taking 20 mgs one time per day. Then my heart doctor advised me that I could try taking it every other day, and monitor the swelling. I have noticed some swelling on the off days when I do not take the lasix. What does this mean, I am a female aged 59, had a tia in 2006, have never smoked, do not drink alcohol period, excercise regularly, work full time, use a low sodium diet am no overweight