It sounds like it is probably still needed in your situation. All seem to indicate that pulse comes down over time, following OHS/valve surgery. Some have indicated that it takes a year or so to normalize. So, give it time and hopefully it will come down.I went off Metoprolol for just a day, and my nice low 50s heart rate jumped up to 115 at rest this morning.
I did the mountain again yesterday, third time in 6 days. Resting pulse this morning was 61. I'm not sure what to make of it, except that it seems that the morning after I do the mountain, my morning pulse is low, and getting lower each climb. Yet, when I don't climb the mountain, the next morning my pulse is back to 78-84 in the morning. Also, once I have started moving about for the day, it goes up and seems to mostly stay up. It's 84 right now.