I have mild tricuspid, plus MVP and LVH, had pvc's (54,000 daily) and Vtach for years; how long I've had this no clue, but I suspect 5-7 years.
I do attribute my heart being "healthy" despite this; was my commitment 4 years ago to exercise daily. I hadn't exercised in so many years it was embarassing, so I started off as slow as I could for a week. Then I added 2 minutes per day, then the next week I upped my speed, vice versa.