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Published on: January 28, 2020
Grade of chronic renal failure, and acute and long-term outcome after percutaneous coronary interventions
Holger Reinecke1, Torsten Trey, Fritz Matzkies
1Department of Cardiology and Angiology, Medizinische Klinik und Poliklinik C, University Hospital Münster, Münster, Germany. reinech@uni-muenster.de
Insights
Mildly elevated creatinine levels (1.3-1.4 mg/dL) significantly increase mortality risk after percutaneous coronary intervention (PCI). Even slight renal impairment poses a substantial threat to long-term survival in PCI patients.
Area of Science:
- Cardiology
- Nephrology
- Clinical Outcomes
Background:
- Moderate chronic renal failure increases mortality post-percutaneous coronary intervention (PCI).
- This study investigates PCI outcomes in patients with mildly elevated creatinine (1.1-1.5 mg/dL).
Purpose of the Study:
- To assess the impact of mildly elevated serum creatinine on long-term outcomes after PCI.
- To determine the risk associated with creatinine levels between 1.1 and 1.5 mg/dL in PCI patients.
Main Methods:
- Retrospective analysis of 1049 PCI patients from 1998-1999.
- Long-term follow-up (1184 days) achieved with 99.6% completeness via questionnaires.
- Statistical analysis including Kaplan-Meier and logistic regression models.
Main Results:
- Mortality increased with creatinine increments above 1.0 mg/dL, significantly at 1.3 mg/dL (12.4% vs. 5.5%).
- Patients with creatinine 1.3-1.4 mg/dL had lower 3-year survival (87%) vs. controls (96%).
- Higher creatinine significantly associated with death (OR 2.122).
Conclusions:
- Mild chronic renal failure (creatinine 1.3-1.4 mg/dL) significantly reduces long-term outcomes post-PCI.
- Elevated creatinine levels, even mildly, indicate a markedly increased risk for PCI patients.
- Findings have implications for a large patient population undergoing PCI.
Background:
Patients with moderate chronic renal failure have recently been identified to suffer from a markedly higher mortality after percutaneous coronary intervention (PCI). We focused on the outcome of PCI patients with just mildly elevated creatinine levels of 1.1 to 1.5 mg/dL.
Methods:
Data of all PCI patients of the years 1998 to 1999 were analyzed. Follow-up was performed by a questionnaire sent to all patients.
Results:
During this period, PCI was performed in 1049 patients. Long-term follow-up (1184 +/- 10 days) was 99.6% complete. Total mortality increased continuously by each creatinine increment of 0.1 mg/dL above 1.0 mg/dL, with a significant difference at 1.3 mg/dL compared to patients with
Conclusions:
In this retrospective cross-sectional study, even patients with slightly elevated serum creatinine levels of 1.3 to 1.4 mg/dL had a significantly reduced long-term outcome after PCI. Thus, even mild chronic renal failure appears to be associated with markedly increased risk after a PCI, with implications to the high number of patients concerned.
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