http://www.foxnews.com/politics/2013/08/06/george-w-bush-undergoes-surgery-for-stent-after-blockage-discovered/

excerpt from Fox article:
"The 67-year-old former president is recovering at a Dallas hospital and is expected to return home on Wednesday, according to a written statement from spokesman Freddy Ford.
"The procedure was performed successfully this morning, without complication, at Texas Health Presbyterian Hospital," the statement said.
Ford said a "blockage was discovered in an artery in his heart" during the former president's annual physical exam at the Cooper Clinic. Bush elected to undergo the procedure at the recommendation of his doctors. "

Read more: http://www.foxnews.com/politics/2013/08/06/george-w-bush-undergoes-surgery-for-stent-after-blockage-discovered/#ixzz2bCSBZtFX