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.

COVID-19 Associated Myocarditis Clinical Outcomes among Hospitalized Patients in the United States: A Propensity Matched Analysis of National Inpatient Sample.

Coronavirus-19 (COVID-19), preliminarily a respiratory virus, can affect multiple organs, including the heart. Myocarditis is a well-known complication among COVID-19 infections, with limited large-scale studies evaluating outcomes associated with COVID-19-related Myocarditis. We used the National Inpatient Sample (NIS) database to compare COVID-19 patients with and without Myocarditis. A total of 1,659,040 patients were included in the study: COVID-19 with Myocarditis (n = 6,455, 0.4%) and COVID-19 without Myocarditis (n = 1,652,585, 99.6%). The primary outcome was in-hospital mortality. Secondary outcomes included mechanical ventilation, vasopressor use, sudden cardiac arrest, cardiogenic shock, acute kidney injury requiring hemodialysis, length of stay, health care utilization costs, and disposition. We conducted a secondary analysis with propensity matching to confirm results obtained by traditional multivariate analysis. COVID-19 patients with Myocarditis had significantly higher in-hospital mortality compared to COVID-19 patients without Myocarditis (30.5% vs. 13.1%, adjusted OR: 3 [95% CI 2.1-4.2], p < 0.001). This cohort also had significantly increased cardiogenic shock, acute kidney injury requiring hemodialysis, sudden cardiac death, required more mechanical ventilation and vasopressor support and higher hospitalization cost. Vaccination and more research for treatment strategies will be critical for reducing worse outcomes in patients with COVID-19-related Myocarditis.