I got the pacemaker because of heart block after the surgery, the surgeon told me my valve was in pretty bad shape and he had to cut pretty deep to do the job right which damaged the electrical system in my heart. The text book says only 5% get this after surgery, 1 out of 20. Last check up I had for the pacemaker I'm only using it 14 percent of the time but I still need it, weather its 14%, 1% or 100% if you need it you need it. I've never had rhythm or electrical issues with my heart my whole life until after surgery, and in comparison to some mine are mild. Having to have a pacemaker after heart valve surgery I guess you can say is a big complication but it doesn't feel that way. You don't want one, that's for sure! But if you have to have it, it's really not that bad. Again, valve surgery is not perfect and heart block is a relatively common complication. I can tell you one thing, after being 3 months out of surgery I'm feeling pretty darn good and expecting to get even better. Doctors said I would be dead by now if I didn't have the surgery when I did. Pacemaker or not, its good to be alive!