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Hyperacute multi-organ thromboembolic storm in COVID-19: a case report
We report a 66-year-old female patient with post-mortem diagnosis of COVID-19 who presented progressive livedo racemosa, acute renal failure and myocardial injury, as well as an absence of respiratory symptoms. Transthoracic echocardiography showed severe spontaneous echo contrast in the right cardiac chambers and right-sided cardiac overload presumed to result from pulmonary microvascular thrombosis or embolism.d-dimer levels were increased. The patient developed an acute ischemic stroke and died 2  days following presentation despite therapeutic anticoagulation. Her predominantly thromboembolic presentation supports the...
Source: Journal of Thrombosis and Thrombolysis - June 5, 2020 Category: Hematology Source Type: research

Complement dysregulation is associated with severe COVID-19 illness
Haematologica. 2021 Jul 22. doi: 10.3324/haematol.2021.279155. Online ahead of print.ABSTRACTSevere acute respiratory syndrome coronavirus-2 (SARS-CoV-2) may manifest as thrombosis, stroke, renal failure, myocardial infarction, and thrombocytopenia, reminiscent of other complement-mediated diseases. Multiple clinical and preclinical studies have implicated complement in the pathogenesis of COVID-19 illness. We previously found that the SARS-CoV-2 spike protein activates the alternative pathway of complement (APC) in vitro through interfering with the function of complement factor H, a key negative regulator of APC. Here, w...
Source: Haematologica - July 22, 2021 Category: Hematology Authors: Jia Yu Gloria F Gerber Hang Chen Xuan Yuan Shruti Chaturvedi Evan M Braunstein Robert A Brodsky Source Type: research