https://www.thrombosisresearch.com/article/S0049-3848(20)30329-7/fulltext
(via https://www.demorgen.be/nieuws/hasselts-ziekenhuis-ontdekt-hoe-aanpak-rond-bloedklonters-covid-19-minder-dodelijk-maakt~b70e052f/ )
TL;DR version: blood clots appear to be a significant contributor to COVID deaths. A more aggressive treatment (doubling of the recommended dose of anti-coagulants) reduced the death rate of ICU admitted patients from ~40% to 4%.
(via https://www.demorgen.be/nieuws/hasselts-ziekenhuis-ontdekt-hoe-aanpak-rond-bloedklonters-covid-19-minder-dodelijk-maakt~b70e052f/ )
TL;DR version: blood clots appear to be a significant contributor to COVID deaths. A more aggressive treatment (doubling of the recommended dose of anti-coagulants) reduced the death rate of ICU admitted patients from ~40% to 4%.