Abstract

BackgroundReadmission after ST‐segment–elevation myocardial infarction (STEMI) poses an enormous economic burden to the US healthcare system. There are limited data on the association between length of hospital stay (LOS), readmission rate, and overall costs in patients who underwent primary percutaneous coronary intervention for STEMI.Methods and ResultsAll STEMI hospitalizations were selected in the Nationwide Readmissions Database from 2010 to 2014. From the patients who underwent primary percutaneous coronary intervention, we examined the 30‐day outcomes including readmission, mortality, reinfarction, repeat revascularization, and hospital charges/costs according to LOS (1–2, 3, 4, 5, and >5 days) stratified by infarct locations. The 30‐day readmission rate after percutaneous coronary intervention for STEMI was 12.0% in the anterior wall (AW) STEMI group and 9.9% in the non‐AW STEMI group. Patients with a very short LOS (1–2 days) were readmitted less frequently than those with a longer LOS regardless of infarct locations. However, patients with a very short LOS had significantly increased 30‐day readmission mortality versus an LOS of 3 days (hazard ratio, 1.91; CI, 1.16–3.16 [P=0.01]) only in the AW STEMI group. Total costs (index admission+readmission) were the lowest in the very short LOS cohort in both the AW STEMI group (P<0.001) and the non‐AW STEMI group (P<0.001).ConclusionsFor patients who underwent primary percutaneous coronary intervention for STEMI, a very short LOS was associated with significantly lower 30‐day readmission and lower cumulative cost. However, a very short LOS was associated with higher 30‐day mortality compared with at least a 3‐day stay in the AW STEMI cohort.

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