Could a fellow perform a cardiac bypass?

With a surgeon. A cardiothoracic surgery "fellow" can perform a cardiac bypass with an attending cardiothoracic surgeon at an academic institution.

Related Questions

Could a do perform a cardiac bypass?

Yes. Dos have the same training as mds. If a do does post-graduate training in surgery and then cardiothoracic surgery, s/he can be a cardiothoracic surgeon qualified to do cardiac bypasses. Read more...