Suggest Treatment For A Heart Disease

Hi, my fiance is getting ready to have an angio gram. With his past history of one mild stroke, blood thinners, ongoing chest pains and numerous test, finally he has been advised for the above immediately! What are his chances? He also has slight high blood pressure and thyroid issues. Was recently told his gallbladder had to be removed, but the 2nd opinion ruled it out, sending him to his cardiologist. He maintains good weight for his height (6'1") at around 185lbs. Caucasian.