Paul,
Those are very good questions, but would require significant review of the data. Procedures like that are done usually at very specialized centers like the Cleveland Clinic or Mayo Clinic.
I do not typically make decisions about on versus off pump CABG -- the surgeons make that desicion. If you aren't sure, it might be best to get a second opinion of someone that can review the actual studies.
The Dor procedure is still controversial. I have seen a few patients with large aneursyms that may have benefitted from the procedure. If he needs a procedure like, a high volume center is the best place to have it done.
I hope this helps.