I've never heard it called PCIS. Right after surgery I was pretty sore, but they told me it was due to the position on the table, which is pretty much bent backwards enough for your shoulder blades to almost touch, but I don't think that would be PCIS. However, I have recurrent acute pericarditis, which is more common with mitral valve surgery. It started about 8 weeks after surgery. It would recur every time they lowered the Prednisone dosage. I stayed on a low dose of Prednisone for 9 months (and gained more weight in that 9 months than both my pregnancies combined) and then when Vioxx came out, I went off Prednisone and would take Vioxx if I started feeling the early symptom, which was always pain under my left collarbone and difficulty breathing. In the beginning, there was a lot of fluid (pericardial effusion) and they talked about a pericardial window, but it dissipated on its own. After that, I'd get the pain, but no fluid. The recurrences were once or twice a month for the first year, gradually growing farther apart until it happened 2-3 times a year. About 7-8 years ago I was put on a course of Colchecine (a gout medicine) and now I get it maybe once every year or two. As soon as I feel the pain, I take Aleve for a couple of days, and it goes away.