title: Diagnostic accuracy and variability of three semi-quantitative methods for assessing right ventricular systolic function from cardiac MRI in patients with acquired heart disease.
abstract: OBJECTIVE
  To evaluate the diagnostic accuracy and variability of 3 semi-quantitative (SQt) methods for assessing right ventricular (RV) systolic function from cardiac MRI in patients with acquired heart disease: tricuspid annular plane systolic excursion (TAPSE), RV fractional-shortening (RVFS) and RV fractional area change (RVFAC).
  
  
  METHODS
  Sixty consecutive patients were enrolled. Reference RV ejection fraction (RVEF) was determined from short axis cine sequences. TAPSE, RVFS and RVFAC were measured on a 4-chamber cine sequence. All SQt analyses were performed twice by 3 observers with various degrees of training in cardiac MRI. Correlation with RVEF, intra- and inter-observer variability, and receiver operating characteristic (ROC) curve analysis were performed for each SQt method.
  
  
  RESULTS
  Correlation between RVFAC and RVEF was good for all observers and did not depend on previous cardiac MRI experience (R range = 0.716-0.741). Conversely, RVFS (R range = 0.534-0.720) and TAPSE (R range = 0.482-0.646) correlated less with RVEF and depended on previous experience. Intra- and inter-observer variability was much lower for RVFAC than for RVFS and TAPSE. ROC analysis demonstrated that RVFAC <41% could predict a RVEF <45% with 90% sensitivity and 94% specificity.
  
  
  CONCLUSIONS
  RVFAC appears to be more accurate and reproducible than RVFS and TAPSE for SQt assessment of RV function by cardiac MRI.
authors: Department of Radiology, University Hospital of Rouen, Rouen Cedex, France. jerome.caudron@chu-rouen.fr
authors: Jérôme
authors: J
authors: Caudron
authors: Jeannette
authors: J
authors: Fares
authors: Pierre-Hugues
authors: PH
authors: Vivier
authors: Valentin
authors: V
authors: Lefebvre
authors: Caroline
authors: C
authors: Petitjean
authors: Jean-Nicolas
authors: JN
authors: Dacher
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