bypass complications

My brother had triple by pass surgery on April 6, He has really had a time of it, First he was seeping from somewhere , now they cant find out where , He has had 12 pints of blood and that still hasnt helped, they dont know where its going. Now they put a pass maker in to see if that would help his heart. This has really got me worried .
He is now forgetting a lot of stuff, I go to see him four or five times a day and he asks me where ,and why I havent came to see him.  Please help , Im really worried.Any one had this or similar thing happen to them?