My dad who is 70 years old, recently had a severe chest pain which started three weeks ago. Since it was of a recurring type, we visited a hospital for a check-up. They initially conducted ECG and then, a 2D echo, after which they said there is a problem but, a minor one and that we need to do a coronary angiography to get a detailed picture. After doing that they suggested a bypass. I am apprehensive about the suggestion since minor problems do not require a bypass (CABG). I am attaching the reports. Can you please go through them and suggest the most suitable option?