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The ARTS II registry compared a cohort of patients treated with multiple-vessel stenting with DES, to the historical CABG cohort in the ARTS I trial (itself a randomized comparison between multiple-vessel bare-metal stenting vs. bypass surgery, only a small minority of patients with multiple-vessel coronary disease have been eligible for inclusion in the studies, and for most patients, clinical judgement by experienced operators suggest one or the other approach is preferred.
When the role of CO2 was investigated in the absence of gas-phase oxidant, using a temporal analysis of products (TAP) reactor, it was found that CO2 dissociates over the reduced catalyst, leading to formation of CO and selective oxygen species.
The registries of the nonrandomized patients screened for these trials may provide as much robust data regarding revascularization outcomes as the randomized analysis.
Other studies, including the ARTS II registry, suggest drug-eluting stenting is not inferior to coronary bypass for treatment of multiple-vessel coronary disease.
For the newer drug-eluting stents, very-long-term results are not yet available; however, five years after implantation, sirolimus-eluting stents remained superior to bare-metal stents.
Risks associated with cardiac catheterization procedures include bleeding, allergic reaction to the X-ray contrast agents used to visualize the coronary arteries, and myocardial infarction.