How has the heart/lung machine changed health care, patients, and medical professionals?
Since this is not my area of expertise, I'll give you information, so you can decide for yourself. I searched Google under the key words "heart lung machine" to get these possible sources:
http://en.wikipedia.org/wiki/Heart-lung_machine
http://www.hsforum.com/stories/storyReader$1486
http://heart.health.ivillage.com/bypasssurgery/heart-lungmachine.cfm
http://inventors.about.com/library/inventors/blheartlungmachine.htm
http://www.answers.com/topic/cardiac-pump
I hope this helps. Thanks for asking.