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• W4252118974 abstract "Abstract Background: Cerebral venous sinus thrombosis (CVST) is a relatively rare, but potentially lethal condition. In approximately 15% of the patients, the cause of CVST remains unclear. Conventional clotting tests such as prothrombin time and activated partial thromboplastin time are not sensitive enough to detect prothrombotic conditions nor mild haemostatic abnormalities. The calibrated automated thrombogram (CAT) is a physiological function test that might be able to detect minor aberrations in haemostasis. Therefore, we aimed to detect the presence of a prothrombotic state in patients who endured idiopathic CVST with the CAT assay. Methods: Adult patients with an idiopathic, radiologically proven CVST that had been admitted during the past 3 years were included in this study. The control group consisted of age/gender matched healthy volunteers. Exclusion criteria were known haematological disorders, malignancy (current/past) or hormonal and anticoagulant therapy recipients. We obtained venous blood samples from all participants following cessation of anticoagulation. Using the CAT assay, we determined lag time, normalized endogenous thrombin potential (ETP), ETP reduction and normalized peak height. In addition, prothrombin concentrations were determined. Results: We found no significant differences in lag time (4.7 min [4.5-4.9] vs 5.3 min [3.7-5.7], p = 0.691), normalized ETP (142% [124-148] vs 124% [88-138], p = 0.222), ETP reduction (29% [26-35] vs 28% [24-58], p >0.999), and normalized peak height (155% [153-175] vs 137 [94-154], p = 0.056) between patients and their age/gender matched controls. In addition, prothrombin concentrations did not significantly differ between patients and controls (120% [105-132] vs 127% [87-139], p >0.999. Conclusion: Reasons for absent overt hypercoagulability within this study population may be the small patient sample, long time since the event (e.g. 3 years) and avoidance of acquired risk factors like oral contraception. Given the fact that CVST is a serious condition with a more than negligible risk of venous thrombosis event recurrence, exclusion of clinically relevant hypercoagulability remains a challenging topic to further study at the acute and later time points, particularly in patients with idiopathic CVST." @default.
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• W4252118974 date "2021-08-03" @default.
• W4252118974 modified "2023-09-26" @default.
• W4252118974 title "Potential Value of the Calibrated Automated Thrombogram in Patients After a Cerebral Venous Sinus Thrombosis; an Exploratory Study" @default.
• W4252118974 doi "https://doi.org/10.21203/rs.3.rs-757602/v1" @default.
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