A neighbor of mine became dehydrated because of an infection (I think it was a kidney infection, but I'm not sure). She went to the emergency room and they pushed IV fluids, and I mean pushed. They hung a total of three bags, and at one point they were squeezing the bags to increase the flow of fluids. They over-hydrated her, and then they had to give her something to deal with the over-hydration. The over-hydration, or the medicine they gave her for that, affected her heart. She went into the hospital with a simple infection, and left needing expensive heart medication.