Old method of heart bypass better than 'off-pump'

It seemed like a great idea — doing bypass surgery while the heart is still beating, sparing patients the complications that can come from going on a heart-lung machine. Now the first big test of this method has produced a surprise: Bypass has fewer problems and is more successful done the old way. Most surprisingly, there were no signs of mental decline in those on the machines.
Original article from http://www.mnn.com/lifestyle/health/stories/old-method-of-heart-bypass-better-than-off-pump