my 72 yr old mom just had leg surgery (femur). She is diabetic and receives dialysis 3 times a wk. We were told she had a minor hear attack within the last 4 days prior to the surgery. The night before the surgery she had dialysis. Surgery occurred the next day at 5 P.M. After surgery & recovery , she began vomiting off and on. They put an IV on. The next morning they took IV off and gave her food, but she did not eat and began vomiting again. She has not eaten all day/night and is having heart arythmias. She has a fever of 100.4. They just put the IV back on her now (approx. 8:00 PM). What would cause the arythmias, the fever, and vomiting.