Does Inappropriate "Plumbing Analogy" Result In Overuse Of Cardiac Stents?

Heart Stents Still Overused, Experts Say by Anahad O'Connor.  Well Blog.  The New York Times.  August 15, 2013.  

(1)  For patients with stable coronary artery disease, studies have shown that inserting a stent is generally _____________________________________.

(2)  According to the American Medical Association and the Joint Commission roughly ____________________ may be inappropriate while another __________ may be questionable.  

(3)  Why is the "plumbing analogy" not adequate?  

(4)  Most ruptures occur at -__________________ and in some cases are so small that they do not _____________ and may be ____________ to cardiologists.  

(5)  What are,  according to Dr. Michael B. Rothberg of the Cleveland Clinic,  two myths about coronary artery disease?

(6)  True or False:  For patients with stable coronary artery disease, research has shown that angioplasty does not prevent future heart attacks.  Explain why or why not.