• Heepeel Chang, Caron B Rockman, Glenn R Jacobowitz, Giancarlo Speranza, William S Johnson, James M Horowitz, Karan Garg, Thomas S Maldonado, Mikel Sadek, and Michael E Barfield.
• Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY.
• J Vasc Surg Venous Lymphat Disord. 2021 May 1; 9 (3): 597-604.

ObjectiveThe pandemic of coronavirus disease 2019 (COVID-19) has caused devastating morbidity and mortality worldwide. In particular, thromboembolic complications have emerged as a key threat for patients with COVID-19. We assessed our experience with deep vein thrombosis (DVT) in patients with COVID-19.MethodsWe performed a retrospective analysis of all patients with COVID-19 who had undergone upper or lower extremity venous duplex ultrasonography at an academic health system in New York City from March 3, 2020 to April 12, 2020 with follow-up through May 12, 2020. A cohort of hospitalized patients without COVID-19 (non-COVID-19) who had undergone venous duplex ultrasonography from December 1, 2019 to December 31, 2019 was used for comparison. The primary outcome was DVT. The secondary outcomes included pulmonary embolism, in-hospital mortality, admission to the intensive care unit, and antithrombotic therapy. Multivariable logistic regression was performed to identify the risk factors for DVT and mortality.ResultsOf 443 patients (COVID-19, n = 188; and non-COVID-19, n = 255) who had undergone venous duplex ultrasonography, the COVID-19 cohort had had a greater incidence of DVT (31% vs 19%; P = .005) than had the non-COVID-19 cohort. The incidence of pulmonary embolism was not significantly different statistically between the COVID-19 and non-COVID-19 cohorts (8% vs 4%; P = .105). The DVT location in the COVID-19 group was more often distal (63% vs 29%; P < .001) and bilateral (15% vs 4%; P < .001). The duplex ultrasound findings had a significant impact on the antithrombotic plan; 42 patients (72%) with COVID-19 in the DVT group had their therapy escalated and 49 (38%) and 3 (2%) had their therapy escalated and deescalated in the non-DVT group, respectively (P < .001). Within the COVID-19 cohort, the D-dimer level was significantly greater in the DVT group at admission (2746 ng/mL vs 1481 ng/mL; P = .004) and at the duplex examination (6068 ng/mL vs 3049 ng/mL; P < .01). On multivariable analysis, male sex (odds ratio [OR], 2.27; 95% confidence interval [CI], 1.06-4.87; P = .035), intensive care unit admission (OR, 3.42; 95% CI, 1.02-11.44; P = .046), and extracorporeal membrane oxygenation (OR, 5.5; 95% CI, 1.01-30.13; P = .049) were independently associated with DVT.ConclusionsGiven the high incidence of venous thromboembolic events in this population, we support the decision to empirically initiate therapeutic anticoagulation for patients with a low bleeding risk and severe COVID-19 infection. Duplex ultrasonography should be reserved for patients with a high clinical suspicion of venous thromboembolism for whom anticoagulation therapy could result in life-threatening consequences. Further study of patients with COVID-19 is warranted to elucidate the etiology of vascular thromboembolic events and guide the prophylactic and therapeutic interventions for these patients.Copyright © 2020 Society for Vascular Surgery. Published by Elsevier Inc. All rights reserved.

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