 [ Symptoms ] my father has had angiography today – 80 90 blockage – another angiography or bypass surgery [ Disease ] hi blocks less than 50  can be treated by angioplasty i e removal of blockage by balloon inflation inside the vessel this is a closed heart surgery by pass is a open heart surgery and if the blockages are more than 70  the by pas is the best treatment availble u can perform angiography after 2 days but it will be of no use the results and treatment options will be the same thanks