title: A single imaging modality in the diagnosis, severity, and prognosis of pulmonary embolism.
abstract: BACKGROUND
  This study aimed to investigate the currency of computerized tomography pulmonary angiography-based parameters as pulmonary artery obstruction index (PAOI), as well as right ventricular diameters for pulmonary embolism (PE) risk evaluation and prediction of mortality and intensive care unit (ICU) requirement.
  
  
  METHODS
  The study retrospectively enrolled 203 patients hospitalized with acute PE. PAOI was calculated according to Qanadli score.
  
  
  RESULTS
  Forty-three patients (23.9%) were hospitalized in the ICU. Nineteen patients (10.6%) died during the 30-day follow-up period. The optimal cutoff value of PAOI for PE 30th day mortality and ICU requirement were found as 36.5% in ROC curve analysis. The pulmonary artery systolic pressure had a significant positive correlation with right/left ventricular diameter ratio (r = 0.531, P < 0.001), PAOI (r = 0.296, P < 0.001), and pulmonary artery diameter (r = 0.659, P < 0.001). The patients with PAOI values higher than 36.5% have a 5.7-times increased risk of death.
  
  
  CONCLUSIONS
  PAOI is a fast and promising parameter for risk assessment in patients with acute PE. With greater education of clinicians in this radiological scoring, a rapid assessment for diagnosis, clinical risk evaluation, and prognosis may be possible in emergency services without the need for echocardiography.
authors.affiliation: Department of Pulmonology, Dicle University Medical Faculty, 21281 Diyarbakir, Turkey.
authors.forename: Hadice Selimoglu
authors.initials: HS
authors.lastname: Sen
authors.affiliation: Department of Pulmonology, Dicle University Medical Faculty, 21281 Diyarbakir, Turkey.
authors.forename: Özlem
authors.initials: Ö
authors.lastname: Abakay
authors.affiliation: Department of Radiodiagnostics, Dicle University Medical Faculty, 21281 Diyarbakir, Turkey.
authors.forename: Mehmet Güli
authors.initials: MG
authors.lastname: Cetincakmak
authors.affiliation: Department of Pulmonology, Dicle University Medical Faculty, 21281 Diyarbakir, Turkey.
authors.forename: Cengizhan
authors.initials: C
authors.lastname: Sezgi
authors.affiliation: Department of Pulmonology, Dicle University Medical Faculty, 21281 Diyarbakir, Turkey.
authors.forename: Süreyya
authors.initials: S
authors.lastname: Yilmaz
authors.affiliation: Department of Pulmonology, Dicle University Medical Faculty, 21281 Diyarbakir, Turkey.
authors.forename: Melike
authors.initials: M
authors.lastname: Demir
authors.affiliation: Department of Pulmonology, Dicle University Medical Faculty, 21281 Diyarbakir, Turkey.
authors.forename: Mahsuk
authors.initials: M
authors.lastname: Taylan
authors.affiliation: Department of Radiodiagnostics, Dicle University Medical Faculty, 21281 Diyarbakir, Turkey.
authors.forename: Hatice
authors.initials: H
authors.lastname: Gümüs
mesh_terms: D000368:Aged; D000792:Angiography; D005260:Female; D006352:Heart Ventricles / Q000000981:diagnostic imaging / Q000503:physiopathology*; D006801:Humans; D007362:Intensive Care Units; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D011651:Pulmonary Artery / Q000000981:diagnostic imaging / Q000503:physiopathology*; D011655:Pulmonary Embolism / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000503:physiopathology*; D014057:Tomography, X-Ray Computed