Thrombotic Complications in Children with COVID-19 and MIS-C

J Thromb Haemost. 2023 May 31:S1538-7836(23)00434-8. doi: 10.1016/j.jtha.2023.05.020. Online ahead of print.ABSTRACTCoronavirus disease 2019 (COVID-19) associated coagulopathy is multifactorial and involves inflammation driven hypercoagulability, endothelial dysfunction, platelet activation and impaired fibrinolysis. Hospitalized adults with COVID-19 are at an increased risk of both venous thrombo-embolism (VTE) and ischemic stroke, resulting in adverse outcomes including mortality. While children with COVID-19 follow a less severe course, both arterial and venous thrombosis have been reported in hospitalized children with COVID-19. Additionally, some children develop a post-infectious, hyper-inflammatory illness termed Multisystem Inflammatory Syndrome of Childhood (MIS-C), which is also associated with hypercoagulability and thrombosis. Several randomized trials have evaluated the safety and efficacy of antithrombotic therapy in adults with COVID-19, though similar pediatric data are lacking. In this narrative review we discuss the postulated pathophysiology of COVID-19 coagulopathy, and summarize principal findings of the recently completed adult trials of antithrombotic therapy. We provide an up-to-date summary of pediatric studies investigating the rate of VTE and ischemic stroke in COVID-19 and MIS-C, in addition to reviewing the findings of the single, non-randomized pediatric trial investigating the safety of prophylactic anticoagulation. Lastly, we outline the adult ...
Source: Thrombosis and Haemostasis - Category: Hematology Authors: Source Type: research