In a single center study of 98 patients undergoing percutaneous coronary intervention, the long-term incidence (mean follow-up 77 +/- 2 months) of major adverse cardiac events in patients who had a high postprocedural cardiac troponin concentration in blood was not significantly higher than that in patients with low troponin. The same conclusion was rendered in a meta-analysis of 7 studies (total patients 2,605), suggesting that low troponin cut points may be inappropriate for prognostic use after percutaneous coronary intervention.