title: In May, I received  stents in two arteries, and two more stents in an artery treated more than ten years ago. The doctor told me to return in six months for a catheterization to make sure the stents were working. Do I really need that catheterization, or would a heart CT scan be a viable option?
mesh_terms: D006328:Cardiac Catheterization; D006321:Heart / Q000000981:diagnostic imaging*; D006801:Humans; D015607:Stents; D014057:Tomography, X-Ray Computed