Hi My Dad has stomach cancer also chronic heart disease he is very poorly but has been ok for last six months, but this week he has been passing inky black liquid motions, he has also been diagnosed very anaemic as he has absolutely no energy, can t get up out of chair.
Thanks for your question on Chat Doctor. I can understand your situation and problem. Blackish inky motions are known as galena. It is due to upper GI (Castro Intestinal) tract bleeding. The blood is altered by stomach acid and becomes black. So black stool in stomach cancer patient indicates poor prognosis.  It suggests worsening of tumor which causes bleeding. Due to blood loss in stool, anemia is unavoidable. So get done CBC (Complete Blood Count) and if hemoglobin is low then he may need blood transfusion. He should also undergo upper GIs copy to control bleeding. Overall the prognosis of stomach cancer with ischemic heart disease is not good. Life expectancy is less than 1 year.