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“Pulmonary Vein Sign” for Pulmonary Embolism Diagnosis in Computed Tomography Angiography

Authors
  • Souza, Luciana Volpon Soares1
  • Zanon, Matheus2, 3
  • Souza, Arthur Soares1
  • Irion, Klaus4
  • Penha, Diana4
  • Alves, Giordano Rafael Tronco5
  • Marchiori, Edson5
  • Hochhegger, Bruno2, 3
  • 1 Rio Preto Radiodiagnostic Intitute - Rua Cila, 3033, Sao Jose Do Rio Preto, 15015-800, Brazil , Sao Jose Do Rio Preto (Brazil)
  • 2 Pavilhão Pereira Filho Hospital, Irmandade Santa Casa de Misericórdia of Porto Alegre - Av. Independência, LABIMED – Medical Imaging Research Lab, Department of Radiology, 75, Porto Alegre, 90020-160, Brazil , Porto Alegre (Brazil)
  • 3 Federal University of Health Sciences of Porto Alegre - R. Sarmento Leite, Department of Diagnostic Methods, 245, Porto Alegre, 90050-170, Brazil , Porto Alegre (Brazil)
  • 4 Liverpool Heart and Chest Hospital, NHS Foundation Trust - Thomas Drive, Department of Radiology, Broadgreen, Liverpool, L143PE, UK , Liverpool (United Kingdom)
  • 5 Federal University of Rio de Janeiro Medical School - Av. Carlos Chagas Filho, Department of Radiology, 373, Rio De Janeiro, 21941-902, Brazil , Rio De Janeiro (Brazil)
Type
Published Article
Journal
Lung
Publisher
Springer US
Publication Date
Oct 14, 2017
Volume
195
Issue
6
Pages
769–774
Identifiers
DOI: 10.1007/s00408-017-0057-7
Source
Springer Nature
Keywords
License
Yellow

Abstract

PurposesConsidering that pulmonary arterial obstruction decreases venous flow, we hypothesized that filling defects in pulmonary veins can be identified in areas adjacent to pulmonary embolism (PE). This sign was named the “pulmonary vein sign” (PVS), and we evaluated its prevalence and performance for PE diagnosis in computed tomography pulmonary angiography (CTPA).MethodsThis retrospective study enrolled consecutive patients with clinical suspicion of PE who underwent CTPA scan. The PVS was defined by the following criteria: (a) presence of a homogeneous filling defect of at least 2 cm in a pulmonary vein; (b) attenuation of the left atrium > 160 Hounsfield units. Using the cases that presented PE on CTPA as reference, sensitivity, specificity, and positive and negative predictive values were calculated for PVS.ResultsIn total, 119 patients (73 female; mean age, 62 years) were included in this study. PE was diagnosed in 44 (35.8%) patients. The PVS was present in 16 out of 44 patients with PE. Sensitivity was 36.36% (95% confidence interval (CI) 22.83–52.26%); specificity, 98.67% (95% CI 91.79–99.93%); positive predictive value, 94.12% (95% CI 69.24–99.69%); negative predictive value, 72.55% (95% CI 62.67–80.70%). The Kappa index for the PVS was good (0.801; 95% CI 0.645–0.957). PVS was correlated with lobar and segmental pulmonary embolism (p < 0.01).ConclusionDespite a low sensitivity, presence of the pulmonary vein sign was highly specific for PE, with a good agreement between readers. This sign could contribute for PE diagnosis on CTPA studies.

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