For Last 6 Months, Occasional Swelling In Ankles If On

For last 6 months, occasional swelling in ankles if on my feet for several hours. Not every day occurance. 67 yr old male with st jude aortic heart valve since November 2000. 6ft 190lb. Ride bike 3 times a week. 15 to 25 miles per week at 15 mph. Lift weights 2 times per week low weight 4 sets of 12 reps each station. Great condition compared to peers. 2 glasses of wine 4 evenings a week. Low carb high protein diet. Bp medicine, coumadine, beta blocker, Lipitor, various vitamines related to heart health. Bp at this moment 128/73.