Heart Failure Causing Uknown Problems

[alexhakimi]

My grandmother has been in the hospital for about 3 weeks now after 2 failed discharge attempts.  She suffered from a MI causing CHF with a pulmonary edema and respiratory failure.  They got everything sorted out and sent her home after 2 weeks.  However, that night, her blood pressure skyrocketed and she has trouble breathing and thus we called an ambulance.  She was then put on vancomyocin because the doctors said that she had pneumonia and the hospital had sent her home with it.  Again, after a week on the ventilator, the doctors agreed that she was ready to go home.  The day of the discharge, her bp rose again and she suffered from respiratory failure so now she is in the CCU again.  The doctors checked her lungs and heart but they all say that they are normal.  She is still on antibiotics for the infection but the infectious disease people are saying that the infection did not cause the problems.  The doctors have no idea what is going on and all they do are tests which keep resulting in negatives.
Does anybody have any idea what is wrong with her?  Any suggestions can help.

Thanks