Just found an excellent site on cardiovascular surgery done by Mid-Atlantic Surgical Associates out of Morristown, NJ which goes into great detail to all aspects of open heart surgery. The post-surgery page seems to answer so many of the questions we all have had. If you roam around their site you will find a video of coronary by-pass.
http://www.heartsurgeons.com/ed5.html
http://www.heartsurgeons.com/ed5.html