Efficacy and Safety of Anticoagulant Therapy in COVID-19-Related Pulmonary Embolism with Different Extension.

Pulmonary embolism (PE) has been associated with SARS-CoV-2 infection, and its incidence is highly variable. The aim of our study was to describe the radiological and clinical presentations, as well as the therapeutic management, of PEs that occurred during SARS-CoV-2 infection in a cohort of hospitalized patients. In this observational study, we enrolled patients with moderate COVID-19 who developed PE during hospitalization. Clinical, laboratory, and radiological features were recorded. PE was diagnosed on clinical suspicion and/or CT angiography. According to CT angiography results, two groups of patients were further distinguished: those with proximal or central pulmonary embolism (cPE) and those with distal or micro-pulmonary embolism (mPE). A total of 56 patients with a mean age of 78 ± 15 years were included. Overall, PE occurred after a median of 2 days from hospitalization (range 0-47 days) and, interestingly, the majority of them (89%) within the first 10 days of hospitalization, without differences between the groups. Patients with cPE were younger (p = 0.02), with a lower creatinine clearance (p = 0.04), and tended to have a higher body weight (p = 0.059) and higher D-Dimer values (p = 0.059) than patients with mPE. In all patients, low-weight molecular heparin (LWMH) at anticoagulant dosage was promptly started as soon as PE was diagnosed. After a mean of 16 ± 9 days, 94% of patients with cPE were switched to oral anticoagulant (OAC) therapy, which was a direct oral anticoagulant (DOAC) in 86% of cases. In contrast, only in 68% of patients with mPE, the prosecution with OAC was indicated. The duration of treatment was at least 3 months from PE diagnosis in all patients who started OAC. At the 3-month follow-up, no persistence or recurrence of PE as well as no clinically relevant bleedings were found in both groups. In conclusion, pulmonary embolism in patients with SARS-CoV-2 may have different extensions. Used with clinical judgment, oral anticoagulant therapy with DOAC was effective and safe.

[ANMCO Position paper: Pulmonary circulation diseases and COVID-19]. / Position paper ANMCO: Malattie del circolo polmonare e COVID-19.

The new coronavirus disease 2019 (COVID-19), which is causing hundreds of thousands of deaths worldwide, is complex and can present with a multi-organ localization. One of its worst complications is an interstitial pneumonia with acute respiratory failure also known as severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which requires non-invasive or invasive ventilation. A severe coagulopathy with poor prognosis is found in 5-10% of cases. SARS-CoV-2 is manifesting as a multi-dimensional disease and, recently, unique co-existing pathophysiological and clinical aspects are being defined: (i) an increased immune and inflammatory response with the activation of a cytokine storm and consequent coagulopathy, which promote both venous thromboembolic events and in situ thrombosis localized in small arterioles and pulmonary alveolar capillaries; (ii) a high intrapulmonary shunt, which often accounts for the severity of respiratory failure, due to reduced hypoxic pulmonary vasoconstriction with pulmonary neo-angiogenetic phenomena. Furthermore, the high incidence of venous thromboembolism in COVID-19 patients admitted to the intensive care unit and the autoptic findings of in situ micro-thrombosis at the pulmonary vascular level, suggest that in this disease coagulopathy, unlike septic disseminated intravascular coagulation, is driven towards a hyper-thrombogenic state, giving rise to a debate (with ongoing studies) about the preventive use of anticoagulant doses of heparin to reduce mortality. The aim of this position paper from the Italian Association of Hospital Cardiologists (ANMCO) is to highlight the main implications that COVID-19 infection has on the pulmonary circulation from a pathophysiological, clinical and management point of view.