title: Correlation of right ventricular dysfunction on acute pulmonary embolism with pulmonary artery computed tomography obstruction index ratio (PACTOIR) and comparison with echocardiography.
abstract: OBJECTIVE
  The aim of this study was to determine the pulmonary artery computed tomography obstruction index ratio (PACTOIR) in patients who have been diagnosed with acute pulmonary embolism (APE) with multi-slice computed tomography (MSCT) and to research the predetermination efficiency of right ventricular dysfunction (RVD) compared with echocardiography (ECHO).
  
  
  METHODS
  One hundred patients (50 males, 50 females), who had ECHO findings and were diagnosed with APE, were subsequently examined in this study. Patients who had RVD on ECHO, tricuspid regurgitation, and pulmonary hypertension parameters that were completely positive were accepted to have RVD.
  
  
  RESULTS
  RVD was identified in 52 patients (52 %) on echocardiography. The PACTOIR value for patients with RVD were evaluated to be significantly higher than those without RVD (41 ± 17 vs 20 ± 12 %, p < 0.001). In the ROC analysis, the PACTOIR cut-off value was 37.5 %, the sensitivity value was 67.3 %, and specificity value was 93.7 % (AUC 0.839, 95 % CI 0.752-0.905). We determined that the patients with RVD and PACTOIR values over 37.5 % can be recognized with a 92.1 % positive predictive value.
  
  
  CONCLUSIONS
  Our conclusions indicated that the PACTOIR rate in RVD diagnosis in patients with APE can recognize the patients with and without RVD.
authors.affiliation: Divison of Radiology, Amasya University SS Education and Research Hospital, Amasya, Turkey.
authors.forename: Kenan
authors.initials: K
authors.lastname: Varol
authors.forename: Cesur
authors.initials: C
authors.lastname: Gumus
authors.forename: Hasan
authors.initials: H
authors.lastname: Yucel
authors.forename: Ferhat
authors.initials: F
authors.lastname: Sezer
authors.forename: Emrah
authors.initials: E
authors.lastname: Seker
authors.forename: Mehmet Fatih
authors.initials: MF
authors.lastname: Inci
authors.forename: Selma
authors.initials: S
authors.lastname: Yucel
authors.forename: Hakki
authors.initials: H
authors.lastname: Kaya
authors.forename: Serdar
authors.initials: S
authors.lastname: Berk
authors.forename: Mehmet Birhan
authors.initials: MB
authors.lastname: Yilmaz
mesh_terms: D000208:Acute Disease; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011651:Pulmonary Artery / Q000000981:diagnostic imaging*; D011655:Pulmonary Embolism / Q000000981:diagnostic imaging*; D012372:ROC Curve; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography; D018497:Ventricular Dysfunction, Right / Q000150:complications / Q000000981:diagnostic imaging*