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Impact of the COVID-19 pandemic on hyperacute stroke treatment: experience from a comprehensive stroke centre in Singapore
AbstractThe Coronavirus disease 2019 (COVID-19) pandemic is rapidly evolving and affecting healthcare systems across the world. Singapore has escalated its alert level to Disease Outbreak Response System Condition (DORSCON) Orange, signifying severe disease with community spread. We aimed to study the overall volume of AIS cases and the delivery of hyperacute stroke services during DORSCON Orange. This was a single-centre, observational cohort study performed at a comprehensive stroke centre responsible for AIS cases in the western region of Singapore, as well as providing care for COVID-19 patients. All AIS patients revie...
Source: Journal of Thrombosis and Thrombolysis - July 12, 2020 Category: Hematology Source Type: research

Macrothrombosis and stroke in patients with mild Covid-19 infection.
We describe cases of patients in New York City presenting with stroke secondary to large vessel thrombosis without occlusion, incidentally found to have COVID-19 with only mild respiratory symptoms. This is in contrast to the venous thrombosis and microangiopathy that has been reported in patients with severe COVID-19. Our cases suggest that even in the absence of severe disease, patients with COVID-19 may be at increased risk of thrombus formation leading to stroke, perhaps due to viral involvement of the endothelium. Further systematic study is needed, since this may have implications for primary and secondary stroke pre...
Source: Thrombosis and Haemostasis - May 27, 2020 Category: Hematology Authors: Fara MG, Stein LK, Skliut M, Morgello S, Fifi JT, Dhamoon MS Tags: J Thromb Haemost Source Type: research

COVID-19 and ischemic stroke: a systematic review and meta-summary of the literature
We report the pooled incidence of AIS in COVID-19 patients to be 1.2%, with a high mortality rate. Elevatedd-dimer, fibrinogen and the presence of antiphospholipid antibodies appear to be prominent in COVID-19 patients with concomitant AIS, but further mechanistic studies are required to elucidate their role in pathogenesis.
Source: Journal of Thrombosis and Thrombolysis - July 12, 2020 Category: Hematology Source Type: research

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...
Source: Thrombosis and Haemostasis - June 2, 2023 Category: Hematology Authors: Riten Kumar Michael J Rivkin Leslie Raffini Source Type: research

Risk factors for intracerebral hemorrhage in patients with COVID-19
AbstractIntracerebral hemorrhage (ICH) can be a devastating complication of coronavirus disease (COVID-19). We aimed to assess risk factors associated with ICH in this population. We performed a retrospective cohort study of adult patients admitted to NYU Langone Health system between March 1 and April 27 2020 with a positive nasopharyngeal swab polymerase chain reaction test result and presence of primary nontraumatic intracranial hemorrhage or hemorrhagic conversion of ischemic stroke on neuroimaging. Patients with intracranial procedures, malignancy, or vascular malformation were excluded. We used regression models to e...
Source: Journal of Thrombosis and Thrombolysis - April 29, 2021 Category: Hematology Source Type: research

Thrombosis in Covid-19 and non-Covid-19 pneumonia: role of platelets
Platelets. 2021 Jun 7:1-9. doi: 10.1080/09537104.2021.1936478. Online ahead of print.ABSTRACTPlatelets may be a target of bacteria and viruses, which can directly or indirectly activate them so promoting thrombosis. In accordance with this, community-acquired pneumonia (CAP) is complicated by ischemia-related vascular disease (myocardial infarction and stroke) in roughly 10% of patients while the incidence of venous thrombosis is uncertain. In CAP platelet biosynthesis of TxA2 is augmented and associated with myocardial infarction; however, a cause-effect relationship is still unclear as unclear is if platelet activation p...
Source: Platelets - June 7, 2021 Category: Hematology Authors: Francesco Violi Vittoria Cammisotto Pasquale Pignatelli 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

Arterial Thrombotic Events in Hospitalized COVID-19 Patients: A Short Review and Meta-Analysis
In conclusion, we found a non-negligible proportion of ATE in patients hospitalized for COVID-19. Our results are similar to those found in hospitalized patients with influenza or with non-COVID viral pneumonia. [...] Thieme Medical Publishers, Inc. 333 Seventh Avenue, 18th Floor, New York, NY 10001, USAArticle in Thieme eJournals: Table of contents  |  Abstract  |  Full text
Source: Seminars in Thrombosis and Hemostasis - July 6, 2022 Category: Hematology Authors: Candeloro, Matteo Schulman, Sam Tags: Review Article Source Type: research