HELP!! Irrational after Bypass Surgery

After my dad had quadruple bypass surgery he has been acting very odd. He is all speedy, talking very fast, acting crazy, irrational, repeating things over and over, not sleeping, mind constantly racing, overly high on life to a point where it's manic-like and he is making all these big decisions that will be devastating if he is not in the right mind to be making them. He is just acting crazy and irrational and possibly delusional and I need to know why. I want my dad back!!! I am afraid that some plaque had loosened up during surgery and caused a stroke. His arteries were so clogged, one was 100% and the others were 90% and two were 75% clogged.

[e.r.boy]

Dementia- like symptoms are a possible side effect of bypass surgery. Some do improve with time. Ask your doctor what can be done. Could be side effects from medication as well, although most heart drugs slow down the body and mind and don't speed it up in a manic way.