ANTIcoagulation in Severe COVID-19 Patients

Summary

Coronavirus disease 2019 (COVID-19), a viral respiratory illness caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), may predispose patients to thrombotic disease due to a state of profound inflammation, platelet activation, and endothelial dysfunction leading to respiratory distress and increased mortality. The incidence of macrovascular thrombotic events varies from 10 to 30% in COVID-19 hospitalized patients depending on the type of arterial or vein thrombosis captured and severity of illness . Observational results in patients receiving routine low-dose prophylactic anticoagulation (LD-PA), several institutions have recently released guidance statement to prevent macrovascular thrombotic events with dose escalation anticoagulation. In these recommendations, high-dose prophylactic anticoagulation (HD-PA) and therapeutic anticoagulation (TA) can be employed either empirically or based on the body mass index and increased D-dimer values. No randomized trial has validated this approach, and other recent recommendations challenge this approach. Microvascular thrombotic events are also of major concern in critically ill patients with COVID-19, even in the absence of obvious macrovascular thrombotic events. A large review of autopsy findings in COVID-19-related deaths reported micro thrombi in small pulmonary vessels. More generally, COVID-19-induced endothelitis and coagulopathy across vascular beds of different organs lead to widespread microvascular thrombosis with microangiopathy and occlusion of capillaries. Thus, in severe COVID-19 patients requiring oxygen therapy without initial macrovascular thrombotic event, a HD-PA or a TA could be beneficial by limiting the extension of microvascular thrombosis and the evolution of the lung and multi-organ microcirculatory dysfunction. In a large observational cohort of 2,773 COVID-19 patients, a lower in-hospital mortality in ventilated patients receiving TA as compared to those receiving PA (29.1% vs. 62.7%). Our hypothesis is dual: i) first, that TA and HD-PA strategies mitigate microthrombosis and each limit the progression of COVID-19, including respiratory failure and multi-organ dysfunction, with in fine a decreased mortality and duration of disease, as compared to a low-dose PA; ii) second, that TA outperforms HD-PA in this setting.

Timeline

Start

2021-04-14

Primary completion

2022-01-10

Completion

2022-03-13

Publications

• Labbe V, Contou D, Heming N, Megarbane B, Razazi K, Boissier F, Ait-Oufella H, Turpin M, Carreira S, Robert A, Monchi M, Souweine B, Preau S, Doyen D, Vivier E, Zucman N, Dres M, Fejjal M, Noel-Savina E, Bachir M, Jaffal K, Timsit JF, Picos SA, Mariotte E, Martis N, Juguet W, Melica G, Rondeau P, Audureau E, Mekontso Dessap A; ANTICOVID Investigators. Effects of Standard-Dose Prophylactic, High-Dose Prophylactic, and Therapeutic Anticoagulation in Patients With Hypoxemic COVID-19 Pneumonia: The ANTICOVID Randomized Clinical Trial. JAMA Intern Med. 2023 Jun 1;183(6):520-531. doi: 10.1001/jamainternmed.2023.0456.
• Labbe V, Contou D, Heming N, Megarbane B, Ait-Oufella H, Boissier F, Carreira S, Robert A, Vivier E, Fejjal M, Doyen D, Monchi M, Preau S, Noel-Savina E, Souweine B, Zucman N, Picos SA, Dres M, Juguet W, Mariotte E, Timsit JF, Turpin M, Razazi K, Gendreau S, Baloul S, Voiriot G, Fartoukh M, Audureau E, Mekontso Dessap A. Comparison of standard prophylactic, intermediate prophylactic and therapeutic anticoagulation in patients with severe COVID-19: protocol for the ANTICOVID multicentre, parallel-group, open-label, randomised controlled trial. BMJ Open. 2022 Apr 26;12(4):e059383. doi: 10.1136/bmjopen-2021-059383.

Drugs

Indications

No indication recorded.