No, an operation can NOT be done because of his high age...! Such a replacement of the artery is a very delicate operation, he wouldn't survive this......

This is dad! First picture is from November last year, the second was taken on January 19th, a few days before his 90th birthday. He looks so good on thiese 2 pictures, who woulfd have guessed that he would be so sick only 2 months later....?!