What causes shortness of breath after heart stent surgery and new medication Brilinta in a 74-year-old man? For example, he had four stents placed about 6 weeks ago but has developed shortness of breath and easy fatigability, especially with the simple daily activity of going outside and feeding the cats. He came in, sat down but I noticed he was a tad paler than usual, but his color returned in about 20 seconds. He said I m more short of breath after the stents than before they were placed. I am asking for my father. He also mentioned that about once a day in the area where a stent was placed he feels as if something is pulling in that area. It does not hurt but is an uncomfortable feeling and lasts very briefly. Thank you.