HI THANKS FOE POSTING YOUR QUERY...
HAVING GONE THROUGH  YOUR CONCERN,I WOULD LIKE TO TELL YOU ,THIS DISEASED STATE OF YOUR HEART IS ASSOCIATED WITH REDUCED PUMPING OF BLOOD INTO VARIOUS BODY PARTS..THIS STATE IS ASSOCIATED REDUCED  BODY ENERGY RESERVES  IN AS YOUR CASE.
SINCE YOU HAD DEFIBRILLATOR IN THE PAST ,THIS 
HEART FAILURE IS COULD GENERALLY BE OF MODERATE  TO SEVERE DEGREE.
CONGESTIVE HEART FAILURE IS ASSOCIATED WITH  INCREASED MORTALITY AND MORBIDITY,HENCE TO LEAD A NORMAL LIFE IS VIRTUALLY NOT POSSIBLE WITH THIS DISEASE.
YOU CAN LEAD A STABILIZED LIFE IF YOU PROTECT YOURSELF FROM FREQUENT INFECTIONS,AVOID EXCESS INTAKE OF SALT,EAT HEALTHY DIET,AVOID EXCESS PROTEIN DIET,REDUCE BODY WEIGHT,CONTROL YOUR BLOOD PRESSURE IN NORMAL LIMITS,AVOID CLIMBING STAIRS,LEAD 
STRESS FREE LIFE.MAINTAIN BODY WEIGHT AROUND 120lbs.
REVIEW WITH HEALTH CHECK INVOLVING COMPLETE BLOOD COUNTS,2 DIMENSIONAL 
ECHOCARDIOGRAPHY,ELECTROCARDIOGRAM,
BLOOD LIPIDS,SERUM ELECTROLYTES SEMIANNUALLY. CONSULT YOUR EXPERT CARDIOLOGIST.
CONCLUSIVE OPINION:
LEADING A NORMAL LIFE IS VIRTUALLY IMPOSSIBLE WITH CONGESTIVE HEART FAILURE..HEALTHY ,PRECAUTIONARY MEASURES ARE STRONGLY NEEDED.
THANK YOU,TAKE CARE