Illness of Jaundice and thereafter heart attack.?

My father was attacked by JAUNDICE and at that time during that illness, was also attacked by Heart Attack. Thereafter, recovery was good within months. Recently, before 3 months he met with an accident and CHIP FRACTURE PATELLA. Now. from two days he is admitted in hospital and from the reports the doctor has said the the heart is working only 20%. But, he is not having any problem for walking or any other tasks. Though I want to know which precautions / steps to be taken for now and for life time .. pls answer promptly.
 
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