The online version of this article (doi:10.1186/1471-2261-14-15) contains supplementary material, which is available to authorized users.
The authors declare that they have no competing interests.
JES and LOJ designed the study and were responsible for data management and for design and implementation of the statistical analysis. All other authors enrolled patients or contributed to data collection. JES and LOJ drafted the report, which was subsequently reviewed by all authors. All authors have seen the final submitted report and agree with its contents.
Chronic kidney disease is associated with increased risk of mortality. We examined the impact of moderate and severe renal insufficiency (RI) on short- and long-term mortality among unselected patients with ST-segment elevation myocardial infarction (STEMI) treated with primary percutaneous coronary intervention (PCI).
From January 1, 2002 to December 31, 2010 all patients with STEMI treated with primary PCI were identified. The hazard ratio (HR) for death was estimated using a Cox regression model, controlling for potential confounders. RI was defined as creatinine clearance (CrCl) < 60 mL/min (moderate RI: CrCl ≤30 < 60 mL/min and severe RI: CrCl < 30 mL/min).
The study cohort consisted of 4,116 patients of whom 898 (21.8%) had RI and 3,218 (78.2%) had a CrCl ≥ 60 mL/min. Compared to patients without RI, patients with RI were older, more often female and more likely to have diabetes mellitus, hypertension and to present with a higher Killip class.
Among patients with a preserved kidney function and patients with RI, 30-day all-cause mortality was 3.5% vs. 20.9% (log-rank p < 0.001); 1-year all-cause mortality was 5.7% vs. 29.4% (log-rank p < 0.001); 5-year all-cause mortality was 13.4% vs. 47.4% (log-rank p < 0.001). Moderate and severe RI were associated with higher 1-year mortality compared to patients with a preserved renal function (CrCl ≤30 < 60 mL/min: adjusted HR 2.71 [95% CI 2.09-3.51], p < 0.001), and (CrCl < 30 mL/min: adjusted HR 7.09 [4.82-10.44], p < 0.001).
In unselected STEMI patients treated with primary PCI, moderate and severe RI were associated with increased risk of mortality.
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- Impact of renal insufficiency on mortality in patients with ST-segment elevation myocardial infarction treated with primary percutaneous coronary intervention
Jonas Emil Sabroe
Knud Nørregaard Hansen
Lisette Okkels Jensen
- BioMed Central
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