What is already known about this subject
We searched PubMed for articles published from the start of the pandemic
up to October 30th, 2020, using the keywords
“coronavirus”, “COVID-19”, “SARS-CoV-2”, “therapeutic
anticoagulation”, and “thrombosis” or “embolism”. The existing
evidence shows that patients with COVID-19 have a hypercoagulable state
with increased risk of thrombotic events. Three studies investigated the
association between therapeutic anticoagulation prior to hospitalization
and mortality with ambivalent results, probably due to methodological
limitations.