Welcome to HCM,
After going through patient's history, she has Polycythemia
vera with pulmonary embolism
with pulmonary hypertension
Infection and taking IV antibiotics she appears to be quite sick.
With available details why was transfusion given as polycythemia patients have high RBC count and hematocrit.
Her activity is very restricted has severe pulmonary Hypertension.
She should be seen by Hematologist
to see if any treatment is possible .
Bloodletting (called venesection or phlebotomy) is one form of treatment, which often may be combined with other therapies including aspirin,and hydroxyurea.
There are some new drug for pulmonary hypertension like Bosentan is a dual endothelin receptor antagonist for treatment of pulmonary artery
Hope this information helps.
Take very good care of her.
Dr.Akhilesh Dubey M.D.