If patient is asymptomatic during normal activities of life then consider management through medicine,food and exercise and changes in life style to remove risk factors like smoking.
I'm sorry for your father's medical problems, but this forum cannot analyze any reports nor provide medical advice. Because you have records available, you may get a quick response from the Cleveland Clinic....the foremost and #1 for heart issues. I know the Cleveland Clinic provides a second opinion. Hope this helps.
http://my.clevelandclinic.org/default.aspx