From what percentage of obstruction a heart surgery is recomended?

My father has a 40% obstruction on his right coronary and 50% on his left coronary, and a 80% obstruction on his left marginal. With these levels what is the best approach? Heart surgery, angioplasty or other? Detail: although in good health he is 73 yo.

It is not clear from your answer where the 50% on the left coronory was located....
The reason this is important is that disease in the Left Main or 3 vessel disease (L coronory, R coronory, Circumflex) are the 2 clear cut indications for CABG or coronory artery bypass grafting. Mostly of the other blockages are handled and handled well with Angioplasty with or without stents..
Your cardiologist will look at several different things to decide on the treatment approach including collateral blood flow..pump function of the heart etc..
And by the way some of the answers above are ridiculously flawed...if the lesions are such that your cardiologist suggests CABG then that is what he should have.

I am 55 years old. I had the same problem 5 years ago ,and i did a heart surgery . I am now in very good health,and i do every thing in my life normal as the strong man.

Usually blockages of less than 50% are left alone. If has 3 blockages of 50% or more open heart surgery might be recommended. He is still pretty young by today's standards and surgery could add years to his life. Good luck!

I had my LAD totally occluded, LCx had mid stenosis, and RCA had tight stenosis. I had CABG (bypass) surgery on 2nd October. I feel that now my quality of life has improved. I am 61 years old, and was discharged from teh hospital on 8th October. It may take about 3 months for full recovery, yet even after 23 days after my operation, I feel quite strong and healthy.

Open heart operations are a thing of the past. the new way is angioplasty. Less pain less hospital stay less time off your feet. For a 73yo the only way to go.

Studies have shown that their is less recurrence with heart surgery compared to other approaches. However he is 73 years old, I would opt for angioplasty.