My mother was 67 years now. She has no BP and no Diabetis. Last few days she was feeling very strain . When cosulted doctor , he told that us that her heart was weak , while the blood is pumping at low rate and she needs a complete rest . what are the precautionaries we have to take , Can she gain the normal status.what diet do u suggest her? Can she eat Avacado fruit , which some body was told that this fruit will strength cardio- vascular system.