My Husband Left Heart Ventricular Is Not Functioning And His

My husband left heart ventricular is not functioning and his heart is only working at 20% he has had about 4 mild heart attacks and retains water it was over his liver this time, as well as 2 blood clots in the lungs and one in the left leg. He was discharged from hospital on Friday but I see that his feet are swelling again and if he stands to long he is on restricted water, can he function normal at his work as he does office work is it save to drive.