COVID-19 With Stress Cardiomyopathy Mortality and Outcomes Among Patients Hospitalized in the United States: A Propensity Matched Analysis Using the National Inpatient Sample Database.

Takotsubo syndrome (stress cardiomyopathy) has become a well-known complication of COVID-19 infections, with limited large-scale studies evaluating outcomes. We used the National Inpatient Sample (NIS) database to compare COVID-19 patients with and without stress cardiomyopathy. A total of 1,659,040 patients were included in the study: COVID-19 with stress cardiomyopathy (n = 1665, 0.1%) and COVID-19 without stress cardiomyopathy (n = 1657, 375, and 99.9%). The primary outcome was in-hospital mortality, with secondary analysis with propensity matching performed to confirm results from traditional multivariate analysis. COVID-19 patients with stress cardiomyopathy had significantly increased in-hospital mortality compared to COVID-19 patients without stress cardiomyopathy (32.8% vs 14.6%, adjusted OR [aOR]: 2.3 [95% CI, 1.2-4.5], P = 0.01) along with significantly increased mechanical ventilation and vasopressor support, hospitalization charge, acute kidney injury requiring hemodialysis, cardiogenic shock, and cardiac arrest. These results emphasize the need for more research to reduce worse outcomes with COVID-19-related stress cardiomyopathy patients.