By pass surgery - yes or no?

[daddysgirl12345]

My dad was having heart burn and he consulted a cardiologist. They found he has CAD and dyslipidemia. Coronary angiographic profile indicated the following;
Left main: Normal
Left Ant. Desc. : Mid 50% stenosis and distal 70% stenosis.
Diagonal - 2 : Large branch. (Dual LAD proximal 85% stenosis.
Left Circumflex:  Normal
RCA : Dominant vessel. Normal.

Final Impression: Single Vessel Disease.

Plan: CABG.

My dad doesn't smoke but he used to drink almost regularly. He is athletic and has low fat diet. I read somewhere that bypass surgery can be bypassed with Yoga or changes in lifestyle. The doctor gave my dad 3 months time within which he should undergo CABG. I wanted to know if that is a good idea. We took a second opinion and the doctor said he could either use a stent or undergo CABG. I have read about the risks involved in CABG and I am confused. Does he have time to make changes to his lifestyle (more exercises and Yoga and vegan food) or is he already at risk? Is CABG the best option? Does he really need a CABG? Or Stent?

[ed34]

Well if you are in doubt, you could ask the cardiologist to back up his decision by performing a nuclear scan. On the right medications and lifestyle, he might open sufficient collaterals to act as natural bypasses. The only real way to detect these is with a nuclear scan because they are so small.

[Flycaster305]

In my opinion, diet changes or meditation can't undo blockages.  They can be enormously important going forward, but when you have blockages, you have blockages.  
I've had ten stents and also have had bypass surgery, so know the advantages and disadvantages.  I'd ask for the least invasive procedure first and go from there, so I'd opt for stents, but you really need to frame this question to your doctor.  Yoga and vegan food can really help going forward.  Keep us informed.