Welcome to HCM,
After going through history of your mother she is suffering fron congestive cardiac failure and treatment depeds on cause of heart failure
most commonly due to Ischemic heart disease
In such patients IV fluids are given very care fully because they can precipitate heart failure.
She is also having anemia
which must be corrected as this can again precipitate failure.
If she is taking anticogulants her PT must be monitored.
If such patients develop atrial fibrillation
this also aggravate heart failure as blood is not pumped from atria to ventricle properly.
If she is on drugs she must take drugs prpperly and regularly, her salt intake and fluid intake must be restricted as per advise of treating doctor.
Please also avoid stress and physical exertion as for as possible.
He 2 D Echocardiography
can give idea about functioning of heart, and her renal function also need sto be taken care of.
If she requres anti arryrhmic drugs and/or pace maker with AICD may be considered.