title: Computed tomography and echocardiography in patients with acute pulmonary embolism: part 1: correlation of findings of right ventricular enlargement.
abstract: OBJECTIVE
  To evaluate the correlation between the computed tomography (CT)-derived right ventricle (RV) to left ventricle (LV) diameter ratio and the RV size determined by echocardiography in patients with acute pulmonary embolism.
  
  
  METHODS
  Consecutive CT pulmonary angiography examinations (August 2003 to May 2010) from a single, large, urban teaching hospital were retrospectively reviewed. For a cohort of 777 subjects who underwent echocardiography within 48 hours of the CT acquisition, the qualitative RV size (divided into 5 categories) extracted from the echocardiography report was correlated with the CT-derived RV/LV diameter ratio.
  
  
  RESULTS
  There was moderate correlation (Spearman rank correlation coefficient=0.54, P<0.001) between the CT-derived RV/LV ratio and the RV size as determined by echocardiography. The correlation coefficient and the concordance rate were inversely related to the time difference between the acquisitions of the 2 modalities.
  
  
  CONCLUSIONS
  CT and echocardiography findings to assess the RV size after acute pulmonary embolism have moderate correlation.
authors.affiliation: *Department of Medicine, Cardiovascular Division †Applied Imaging Science Laboratory, Department of Radiology §Department of Medicine, Brigham and Women's Hospital & Harvard Medical School, Boston ‡Department of Radiology, University of Massachusetts Medical School, Worcester, MA.
authors.forename: Nicole
authors.initials: N
authors.lastname: Wake
authors.forename: Kanako K
authors.initials: KK
authors.lastname: Kumamaru
authors.forename: Elizabeth
authors.initials: E
authors.lastname: George
authors.forename: Arash
authors.initials: A
authors.lastname: Bedayat
authors.forename: Nina
authors.initials: N
authors.lastname: Ghosh
authors.forename: Carlos
authors.initials: C
authors.lastname: Gonzalez Quesada
authors.forename: Frank J
authors.initials: FJ
authors.lastname: Rybicki
authors.forename: Marie
authors.initials: M
authors.lastname: Gerhard-Herman
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D017380:Hypertrophy, Right Ventricular / Q000000981:diagnostic imaging* / Q000209:etiology; D007091:Image Processing, Computer-Assisted; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D011651:Pulmonary Artery / Q000000981:diagnostic imaging; D011655:Pulmonary Embolism / Q000150:complications / Q000000981:diagnostic imaging*; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography