It should be remembered that angioplasty is a procedure that is ONLY ever done to help someone with a very serious life threatening condition
I think you should leave that up to the specialist cardiologist to decide. I am sure there are varying degrees of "serious" heart conditons (didn't Tony Blair have one), just like there are varying degrees of all "serious" illnesses (Asthma for example).
What this person discussed with their doctor is not our concern. Perhaps the angiplasty was a recommendation rather than an emergency treatment? Who knows and frankly who cares. The most likely time for complications to arise following this surgery is in the first could of weeks following the op. I am sure there are statistics to show this.
Finally, as these are anonymous forums, readers have no real idea about the OPs real motivation. For all we know it could be for their own personal financial gain?!