Hi, I had MVR last March. I also feel the amount of blood increased after Coumadin, though it’s not heavy enough to make me consider ablation. Also, after about a year of irregular cycles following MVR, I seem to have settled into about 25-day cycles of 7~9 days now, which is shorter cycle and longer days than my pre-Coumadin time. But also maybe because the blood is thinner, it’s less painful now. That was one unexpected positive thing that came out of the whole ordeal, and I hope it stays that way.
When I went to see OBGYN about the irregular periods, she said it’s common for women on Coumadin to experience heavier periods.
Best of luck with your upcoming surgery.