Your GP may have to monitor you on whatever anticoagulant you are put on, if you are put on one.
If you have complications, you would need to see a local interventional radiologist. These are the guys who do procedures through the blood vessels, with minimal entry incision; the vascular surgeons are the ones with a scalpel, as I understand it, which is not needed for this.
Will you go back to NY for a two-month or six-month follow-up? There might not be much for other options for getting blood flow checked locally. You will probably have whatever imaging is done pre- and post-procedure, so many those could be of use to a local IR to compare for a later follow-up?
"However, the truth in science ultimately emerges, although sometimes it takes a very long time," Arthur Silverstein, Autoimmunity: A History of the Early Struggle for Recognition