Aggressive Approach Appropriate?

Was diagnosed with 70-80% blockage (estimated by the cardio) in one artery after a nuclear stress test. He did not recommend any further testing because even if a folow-up angio gram confirmed the 70-80% blockage, this was not high enough to warrant stents, etc. He put me on low dose 20 mg. statin, metaprolol, and low dose aspirin daily. And to follow-up with another stress test in a few years.

Since then, I have been on the web where some sites stated that for this high of a blockage, a more aggressive approach is warranted such as doing an angio or even going directly to stent intervention.

Although I really like my cardiologist, those sites have me thinking also.

What would be the level of blockage before more "aggressive" measures are warranted? Basically, I'm looking for your expert opinion on what you would do. Thank you very much.

[Cleveland Clinic]

I would have recommend the angiogram because the blockage could have been 90%, in which case the recommendation would have been a stenting procedure. How he can  determine the severity of a blockage by the findings of a stress test befuddles me. A stress test is a measure of relative blood flow to relative parts of the heart; if one area has less flow it may mean that there is a blockage there, but it may mean that there are two blockages, since the scan measures the difference in radioactivity between two areas.