my sister is in the hospital now--rushed there for the 5th time in 6 wks. her symptoms: shortness of breath, chest pressure--pain if she exerts herself, limb numbness--today her legs & feet went--she had no feeling in them, passing out & dizziness they have done a heart cath--shows no blockage they have done a CT scan which shows that her herat, lungs, kidneys, bladder & pancreas are all okay no heart enlargement and they did a dye test to check for leaks still nothing and she has the same symptoms any other ideas?