Abstract 16382: Short-and Long-Term Prognostic Value of Serum Potassium Level After percutaneous Coronary Intervention for ST-Segment Elevation Myocardial Infarction
Objectives: We sought to evaluate the relationship between serum potassium levels and prognosis in ST-segment elevation myocardial infarction (STEMI) patients undergoing percutaneous coronary interventions (PCI).
Methods: A total population consisted of 1006 patients registered in Ibaraki Cardiovascular Assessment Study multi-center registry who underwent PCI for STEMI between April 2007 and August 2012.
Results: There was a U-shaped relationship between serum potassium levels and 30-day mortality (table). The group with serum potassium levels of 3.5-4.0mEq/L had significantly lower 30-day mortality than in lower or higher potassium groups. Kaplan-Meier survival curve showed the group with higher potassium level (≧4.5mEq/L) had a higher long-term mortality compared with normal potassium group (Figure). Multivariate Cox proportional hazards regression analysis including chronic kidney disease and ejection fraction showed that higher potassium level (≧4.5mEq/L) was an independent predictor of long-term mortality (Hazard ratio 1.82, 95%CI 1.03-3.23). Low potassium was not associated with long-term prognosis in this population.
Conclusion: Serum potassium level on admission was associated not only with short-term but also with long-term prognosis in patients with STEMI.
- © 2013 by American Heart Association, Inc.