Incidence and characterization of acute pulmonary embolism in patients with SARSCoV-2 pneumonia: A multicenter Italian experience

Marco Loffi, Valentina Regazzoni, Marco Toselli, Alberto Cereda, Anna Palmisano, Davide Vignale, Francesco Moroni, Gianluca Pontone, Daniele Andreini, Elisabetta Maria Mancini, Alberto Monello, Gianmarco Iannopollo, Gianni Casella, Francesco Monetti, Lorenzo Monti, Giuseppe Ferrillo, Gaetano Liccardo, Elisabetta Tonet, Ottavio Zucchetti, Alberto CossuMarco Dugo, Gianluigi Patelli, Pietro Sergio, Antonio Esposito, Antonio Colombo, F. Giannini, Raffaele Piccolo, Gian Battista Danzi

Research output: Contribution to journalArticlepeer-review


Background and aims Several studies reported a high incidence of pulmonary embolism (PE) among patients with severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) infection, but detailed data about clinical characteristics, risk factors of these patients and prognostic role of PE are still lacking. We aim to evaluate the occurrence of pulmonary embolism among patients with SARS-CoV-2 infection, and to describe their risk factors, clinical characteristics, and inhospital clinical outcomes. Methods This is a multicenter Italian study including 333 consecutive SARS-CoV-2 patients admitted to seven hospitals from February 22 to May 15, 2020. All the patients underwent computed tomography pulmonary angiography (CTPA) for PE detection. In particular, CTPA was performed in case of inadequate response to high-flow oxygen therapy (Fi02≥0.4 to maintain Sp02≥92%), elevated D-dimer (>0.5μg/mL), or echocardiographic signs of right ventricular dysfunction. Clinical, laboratory and radiological data were also analyzed. Results Among 333 patients with laboratory confirmed SARS-CoV-2 pneumonia and undergoing CTPA, PE was detected in 109 (33%) cases. At CTPA, subsegmental, segmental, lobar and central thrombi were detected in 31 (29%), 50 (46%), 20 (18%) and 8 (7%) cases, respectively. In-hospital death occurred in 29 (27%) patients in the PE-group and in 47 (21%) patients in the non-PE group (p = 0.25). Patients in PE-group had a low rate of traditional risk factors and deep vein thrombosis was detected in 29% of patients undergoing compression ultrasonography. In 71% of cases with documented PE, the thrombotic lesions were located in the correspondence of parenchymal consolidation areas. Conclusions Despite a low rate of risk factors for venous thromboembolism, PE is present in about 1 out 3 patients with SARS-CoV-2 pneumonia undergoing CTPA for inadequate response to oxygen therapy, elevated D-dimer level, or echocardiographic signs of right ventricular dysfunction. In most of the cases, the thromboses were located distally in the pulmonary tree and were mainly confined within pneumonia areas.

Original languageEnglish
Article numbere0245565
JournalPLoS One
Issue number1 January
Publication statusPublished - Jan 2021

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)
  • General


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