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  • Title: A systematic review on internal jugular vein thrombosis and pulmonary embolism.
    Author: Drakos P, Ford BC, Labropoulos N.
    Journal: J Vasc Surg Venous Lymphat Disord; 2020 Jul; 8(4):662-666. PubMed ID: 32321692.
    Abstract:
    OBJECTIVE: Whereas the internal jugular vein is the most common site of thrombosis in patients with deep venous thrombosis (DVT) of the upper extremity, the association between internal jugular vein thrombus and pulmonary embolism (PE) has not been clearly characterized. The objective of this paper was to determine the risk of embolization of an isolated internal jugular vein thrombus causing a clinically overt PE, with the secondary objective of assessing the value of therapeutic anticoagulation in patients with isolated internal jugular vein thrombosis (IJVT) in improving clinical outcomes. METHODS: The National Center for Biotechnology Information, Cochrane Library, Web of Science, and Cumulative Index to Nursing and Allied Health Literature were searched for articles. The relevant articles included were selected according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Studies were included if they specifically examined incidence of IJVT and incidence of PE and were excluded if they did not report on these rates specifically or failed to specify the exact site of upper extremity DVT. RESULTS: Of the 274 articles screened, 25 were selected for full review following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses inclusion criteria. Seven of those provided adequate data and were included in the review. There were only two studies demonstrating IJVT before PE that could probably establish causality, but this might be confounded by the presence of concomitant upper extremity DVT in one of the cases and radiologic findings compatible with resolving PE in another that might have preceded the presence of internal jugular vein thrombus. In the patients who were found to have PE in the setting of IJVT, the overall observed mortality attributed to PE was low. In specific studies, the use of anticoagulation did not reduce the mortality in those with isolated IJVT or affect the rate of thrombus resolution while carrying the risk of bleeding complications in these patients, who often have severe comorbidities. CONCLUSIONS: Despite the proximity of the jugular vein to the right side of the heart and the pulmonary vasculature, there is little proof of propagation of the thrombus to cause a clinically overt PE. Whereas current practice is to treat the patients with IJVT in the same way as patients with lower extremity DVTs are treated, the lack of any survival benefit in those with isolated IJVT and the risk of bleeding complications warrant further studies to characterize the need of medical management in this population of patients.
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