Causes and Predictors of 30-Day Readmission in Patients With COVID-19 and ST-Segment-Elevation Myocardial Infarction in the United States: A Nationwide Readmission Database Analysis.

Background Rates, causes, and predictors of readmission in patients with ST-segment-elevation myocardial infarction (STEMI) during COVID-19 pandemic are unknown. Methods and Results All hospitalizations for STEMI were selected from the US Nationwide Readmissions Database 2020 and were stratified by the presence of COVID-19. Primary outcome was 30-day readmission. Multivariable hierarchical generalized logistic regression analysis was performed to compare 30-day readmission between patients with STEMI with and without COVID-19 and to identify the predictors of 30-day readmissions in patients with STEMI and COVID-19. The rate of 30-day all-cause readmission was 11.4% in patients with STEMI who had COVID-19 and 10.6% in those without COVID-19, with the adjusted odds ratio (OR) not being significantly different between the two groups (OR, 0.88 [95% CI, 0.73-1.07], =0.200). Of all 30-day readmissions in patients with STEMI and COVID-19, 41% were for cardiac causes. Among the cardiac causes, 56% were secondary to acute coronary syndrome, while among the noncardiac causes, infections were the most prevalent. Among the causes of 30-day readmissions, infectious causes were significantly higher for patients with STEMI who had COVID-19 compared with those without COVID-19 (29.9% versus 11.3%, =0.001). In a multivariable model, congestive heart failure, chronic kidney disease, low median household income, and length of stay ≥5 days were found to be associated with an increased risk of 30-day readmission. Conclusions Post-STEMI, 30-day readmission rates were similar between patients with and without COVID-19. Cardiac causes were the most common causes for 30-day readmissions, and infections were the most prevalent noncardiac causes.