Outcomes of Acute Mesenteric Ischemia in Patients With COVID-19: A Nationwide Database Study.

Introduction Initially regarded as primarily a respiratory illness, coronavirus disease 2019 (COVID-19) has since been recognized as a complex disease affecting multiple systems. A COVID-19 infection can cause a hypercoagulable state leading to thrombotic complications in various systems. Acute mesenteric ischemia (AMI) has been reported as a rare complication of COVID-19, carrying a significant mortality rate. Although some risk factors for AMI in COVID-19 patients have been identified, there is a lack of large-scale studies examining outcomes and predictors of mortality. This study aims to assess the outcomes and identify predictors of mortality in a larger cohort of hospitalized COVID-19 patients with AMI, utilizing a retrospective analysis of the National Inpatient Sample (NIS) database. Methods Data from the 2020 NIS database were retrospectively analyzed. Patients aged 18 years and older, with a principal diagnosis of mesenteric ischemia were identified using the International Classification of Diseases, Tenth Revision (ICD-10) codes. The population was divided into mesenteric ischemia with COVID-19 and mesenteric ischemia without COVID-19. Patient demographics, comorbidities, hospital characteristics, and outcomes such as mortality, length of stay, and costs were analyzed. Multivariable logistic regression was performed to identify predictors of mortality. Results Among the 18,185 patients with acute mesenteric ischemia in 2020, 2.1% (n=370) had AMI with COVID-19 while 97.9% (n=17,810) had AMI only. In comparison to those without COVID-19, patients with AMI and COVID-19 had significantly higher in-hospital mortality. They also had higher odds of acute kidney injury, coronary artery disease, and ICU admission. Increasing age and white race were identified as predictors of mortality. Patients with COVID-19 had longer hospital stays and higher total costs compared to those without COVID-19. Discussion In this retrospective analysis of the NIS database, COVID-19 infection was associated with higher mortality in patients with AMI. Additionally, COVID-19 patients with AMI experienced increased odds of complications and higher resource utilization. Advanced age and white race were identified as predictors of mortality. These findings emphasize the importance of early recognition and management of AMI in COVID-19 patients, especially in high-risk populations.