How to Diagnose Heart Artery Blockage/ Coronary Artery Disease?

What does blockage of heart arteries or coronary artery disease mean?
How can I find out if my heart arteries are blocked?
Which is better at diagnosing coronary artery disease- stress tests or coronary angiogram?
Isn’t coronary angiogram a gold standard?
If coronary angiogram has all these shortcomings and is invasive, why do it?
If I have a normal stress test today, does that mean that I can be rest assured that I will not have heart attack next 5, 10 or 15 years?
What is the importance of tests for diagnosis of coronary artery disease?
What are different types of tests used to diagnose coronary artery disease or blockage of heart arteries?

Your Questions on Heart Stents Including Those on Problems With New Stents Answered

What is a stent?
What is the difference between 'new' and 'old' stent?
Why was there a need for drug-eluting stent?
I am hearing a lot about problems with new stents. What exactly is wrong with new stents?
If new stents can cause fatal problems, why not take them off the market?
What about a moratorium on the new stents till the problem is better studied?
Does that mean that public safety does not matter? Are we going to let all those people die from this compication?
What are your thoughts?