The American College Of Cardiology kicks off its annual meeting in Chicago on Saturday. Ahead of the world's biggest gathering of cardiologists in Chicago this weekend, there's a flurry of news about stents--the expensive little wire mesh tubes that prop open clogged arteries, explains CNBC Pharmaceuticals Reporter Mike Huckman on his blog Pharma’s Market.

First, the Food and Drug Administration has posted new proposed guidelines for pre-and post-market testing of the controversial devices.