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Background: It is uncertain whether higher doses of anticoagulants than recommended for thromboprophylaxis are necessary in COVID-19 patients hospitalized in general wards METHODS: This is a multicentre, open-label, randomized trial performed in 9 Italian centres, comparing 40 mg b.i.d. versus 40 mg o.d. enoxaparin in COVID-19 patients, between April 30 2020 and April 25 2021. Primary efficacy outcome was in-hospital incidence of venous thromboembolism (VTE): asymptomatic or symptomatic proximal deep vein thrombosis (DVT) diagnosed by serial compression ultrasonography (CUS), and/or symptomatic pulmonary embolism (PE) diagnosed by computed tomography angiography (CTA). Secondary endpoints included each individual component of the primary efficacy outcome and a composite of death, VTE, mechanical ventilation, stroke, myocardial infarction, admission to ICU. Safety outcomes included major bleeding., Results: The study was interrupted prematurely due to slow recruitment. We included 183 (96%) of the 189 enrolled patients in the primary analysis (91 in b.i.d., 92 in o.d.). Primary efficacy outcome occurred in 6 patients (6.5%, 0 DVT, 6 PE) in the o.d. group and 0 in the b.id. group (ARR 6.5, 95% CI: 1.5-11.6). The absence of concomitant DVT and imaging characteristics suggests that most pulmonary artery occlusions were actually caused by local thrombi rather than PE. Statistically nonsignificant differences in secondary and safety endpoints were observed, with two major bleeding events in each arm., Conclusions: No DVT developed in COVID-19 patients hospitalized in general wards, independently of enoxaparin dosing used for thromboprophylaxis. Pulmonary artery occlusions developed only in the o.d. group. Our trial is underpowered and with few events., (© 2021 Stichting European Society for Clinical Investigation Journal Foundation. Published by John Wiley & Sons Ltd.)

Introduction: Early discharge of patients with acute low-risk pulmonary embolism requires validation by prospective trials with clinical and quality-of-life outcomes., Methods: The multinational Home Treatment of Patients with Low-Risk Pulmonary Embolism with the Oral Factor Xa Inhibitor Rivaroxaban (HoT-PE) single-arm management trial investigated early discharge followed by ambulatory treatment with rivaroxaban. The study was stopped for efficacy after the positive results of the predefined interim analysis at 50% of the planned population. The present analysis includes the entire trial population (576 patients). In addition to 3-month recurrence (primary outcome) and 1-year overall mortality, we analysed self-reported disease-specific (Pulmonary Embolism Quality of Life (PEmb-QoL) questionnaire) and generic (five-level five-dimension EuroQoL (EQ-5D-5L) scale) quality of life as well as treatment satisfaction (Anti-Clot Treatment Scale (ACTS)) after pulmonary embolism., Results: The primary efficacy outcome occurred in three (0.5%, one-sided upper 95% CI 1.3%) patients. The 1-year mortality was 2.4%. The mean±sd PEmb-QoL decreased from 28.9±20.6% at 3 weeks to 19.9±15.4% at 3 months, a mean change (improvement) of -9.1% (p<0.0001). Improvement was consistent across all PEmb-QoL dimensions. The EQ-5D-5L was 0.89±0.12 at 3 weeks after enrolment and improved to 0.91±0.12 at 3 months (p<0.0001). Female sex and cardiopulmonary disease were associated with poorer disease-specific and generic quality of life; older age was associated with faster worsening of generic quality of life. The ACTS burden score improved from 40.5±6.6 points at 3 weeks to 42.5±5.9 points at 3 months (p<0.0001)., Conclusions: Our results further support early discharge and ambulatory oral anticoagulation for selected patients with low-risk pulmonary embolism. Targeted strategies may be necessary to further improve quality of life in specific patient subgroups., Competing Interests: Conflict of interest: S. Barco reports personal fees from Biocompatibles Group UK, LEO Pharma, Bayer, nonfinancial support from Bayer HealthCare and Daiichi Sankyo, grants from Sanofi, outside the submitted work. Conflict of interest: I. Schmidtmann reports grants from Merck Serono, outside the submitted work. Conflict of interest: W. Ageno reports grants from Bayer, personal fees from Boehringer Ingelheim, Daiichi Sankyo and Bristol Myers Squibb/Pfizer, outside the submitted work. Conflict of interest: T. Anušić has nothing to disclose. Conflict of interest: R.M. Bauersachs reports personal fees for lectures and advisory board work from Bayer HealthCare, Bristol Myers Squibb/Pfizer and Daiichi Sankyo, during the conduct of the study. Conflict of interest: C. Becattini reports personal fees for consultancy and lectures from Bayer HealthCare, Daiichi Sankyo and Bristol Myers Squibb, outside the submitted work. Conflict of interest: E. Bernardi has nothing to disclose. Conflict of interest: J. Beyer-Westendorf reports patient fees from the Center for Thrombosis and Hemostasis (CTH), University Medical Center Mainz, during the conduct of the study; grants and personal fees for advisory board work, lectures and travel support from Bayer, outside the submitted work. Conflict of interest: L. Bonacchini has nothing to disclose. Conflict of interest: J. Brachmann reports grants and personal fees from Medtronic, during the conduct of the study; grants from Medtronic, St Jude and Biotronik, outside the submitted work. Conflict of interest: M. Christ reports grants from the University of Mainz, during the conduct of the study. Conflict of interest: M. Czihal reports personal fees from Bayer HealthCare, Roche, AstraZeneca, MSD Sharp & Dohme and LEO Pharma, outside the submitted work. Conflict of interest: D. Duerschmied reports personal fees for lectures and nonfinancial support (travel costs) from Bayer, Pfizer, Daiichi Sankyo and CytoSorbents, outside the submitted work. Conflict of interest: K. Empen reports travel costs and personal fees for lectures from Bayer HealthCare, outside the submitted work. Conflict of interest: C. Espinola-Klein reports lecture fees from Bayer HealthCare, outside the submitted work. Conflict of interest: J.H. Ficker reports personal fees for lectures from Daiichi Sankyo, outside the submitted work. Conflict of interest: C. Fonseca reports personal fees for consultancy and lectures from Bayer, outside the submitted work Conflict of interest: S. Genth-Zotz has nothing to disclose. Conflict of interest: D. Jiménez has nothing to disclose. Conflict of interest: V-P. Harjola reports personal fees for lectures from Bayer, personal fees for lectures and advisory board work from Boehringer Ingelheim and Pfizer, personal fees for advisory board work from MSD, outside the submitted work. Conflict of interest: M. Held reports honoraria for advisory board work from Actelion, Bayer, Boehringer, MSD, Daiichi Sankyo and Roche, honoraria for lectures from Actelion, Bayer, Berlin-Chemie, Bristol Myers Squibb, MSD, Daichi Sankyo, Pfizer and OMT, grants from Actelion, outside the submitted work. Conflict of interest: L. Iogna Prat has nothing to disclose. Conflict of interest: T.J. Lange reports nonfinancial support for meeting attendance from the Center for Thrombosis and Hemostasis (CTH), University Medical Center Mainz, during the conduct of the study; personal fees from Bayer and Pfizer, outside the submitted work. Conflict of interest: M. Lankeit reports personal fees for lectures and nonfinancial support (travel costs) from Actelion, Bayer and Daiichi Sankyo, personal fees for lectures from MSD and Bristol Myers Squibb/Pfizer, grants from BRAHMS – Thermo Fisher Scientific, outside the submitted work. Conflict of interest: A. Manolis has nothing to disclose. Conflict of interest: A. Meyer has nothing to disclose. Conflict of interest: T. Münzel has nothing to disclose. Conflict of interest: P. Mustonen reports personal fees for lectures and advisory board work from Boehringer Ingelheim, Bayer, Sanofi-Anetis, LEO Pharma, Bristol Myers Squibb/Pfizer and MSD, outside the submitted work. Conflict of interest: U. Rauch-Kroehnert reports grants from Universitätsmedizin der Johannes Gutenberg-Universität Mainz, Interdisziplinäres Zentrum Klinische Studien (IZKS) during the conduct of the study; personal fees from Bayer Vital, outside the submitted work. Conflict of interest: P. Ruiz-Artacho reports personal fees from Bayer, Daiichi Sankyo, Sanofi, Pfizer, LEO Pharma and Rovi, outside the submitted work. Conflict of interest: S. Schellong reports personal fees for lectures and consultancy from Bayer, Boehringer Ingelheim, Daiichi Sankyo and Aspen, grants and personal fees for lectures and consultancy from Bristol Myers Squibb, outside the submitted work. Conflict of interest: M. Schwaiblmair has nothing to disclose. Conflict of interest: R. Stahrenberg has nothing to disclose. Conflict of interest: L. Valerio has nothing to disclose. Conflict of interest: P.E. Westerweel has nothing to disclose. Conflict of interest: P.S. Wild reports grants and personal fees from Boehringer Ingelheim, Sanofi-Aventis, Bayer Vital and Bayer HealthCare, grants from Philips Medical Systems and Daiichi Sankyo Europe, personal fees from AstraZeneca, personal fees and equipment provision from DiaSorin, equipment provision from IEM, outside the submitted work. Conflict of interest: S.V. Konstantinides reports grants and provision of study drug from Bayer, during the conduct of the study; grants and personal fees for consultancy and lectures from Boehringer Ingelheim, Daiichi Sankyo, Biocompatibles Group UK and MSD, personal fees for consultancy and lectures from Bayer and Bristol Myers Squibb/Pfizer, grants and personal fees for lectures from Actelion, grants from Servier, outside the submitted work., (Copyright ©ERS 2021.)

Aims: To investigate the efficacy and safety of early transition from hospital to ambulatory treatment in low-risk acute PE, using the oral factor Xa inhibitor rivaroxaban., Methods and Results: We conducted a prospective multicentre single-arm investigator initiated and academically sponsored management trial in patients with acute low-risk PE (EudraCT Identifier 2013-001657-28). Eligibility criteria included absence of (i) haemodynamic instability, (ii) right ventricular dysfunction or intracardiac thrombi, and (iii) serious comorbidities. Up to two nights of hospital stay were permitted. Rivaroxaban was given at the approved dose for PE for ≥3 months. The primary outcome was symptomatic recurrent venous thromboembolism (VTE) or PE-related death within 3 months of enrolment. An interim analysis was planned after the first 525 patients, with prespecified early termination of the study if the null hypothesis could be rejected at the level of α = 0.004 (<6 primary outcome events). From May 2014 through June 2018, consecutive patients were enrolled in seven countries. Of the 525 patients included in the interim analysis, three (0.6%; one-sided upper 99.6% confidence interval 2.1%) suffered symptomatic non-fatal VTE recurrence, a number sufficiently low to fulfil the condition for early termination of the trial. Major bleeding occurred in 6 (1.2%) of the 519 patients comprising the safety population. There were two cancer-related deaths (0.4%)., Conclusion: Early discharge and home treatment with rivaroxaban is effective and safe in carefully selected patients with acute low-risk PE. The results of the present trial support the selection of appropriate patients for ambulatory treatment of PE., (© The Author(s) 2019. Published by Oxford University Press on behalf of the European Society of Cardiology.)