I ve HAD THREE OPEN HEART SURGERIES, THE FIRST BEING AORTIC VALVE REPLACEMENT DUR TO CONGENITAL HEART DEFECTS AND HAVE BEEN ON COUMADIN SINCE 1990. NOW I HAVE SEVERE EDEMA, LEGS, ANKLES, FEET AND TOES AND I DO HAVE CYST IN KIDNEYS AND LATELY MY LEFT SIDE & BACK HAVE BEEN HURTING, COULD THIS BE MY KIDNEYS CAUSING EDEMA, DR RULED OUT CHF WHICH I M ALSO IN, BUT NOTHING HAS BEEN EXAMINED FOR MY SIDE/BACK PAIN. AM ON FUROSEMIDE 40MG DAILEY