Yes, My Sister Has A Weak Heart, Has Had A

Yes, my sister has a weak heart, has had a triple by pass about 17 years ago, just had major surgery, that is had an 8 inch wide gallbladder , with 8 inch stone removed after it had been drained for about 8 wks.
Her legs are both swelling to the knees. The leg remains indented after I press them., for a minute or so.
They remain indented for about 5 minutes.
Please help..