title: Assessment of left ventricular ejection fraction using the wall motion score index in cardiac magnetic resonance imaging.
abstract: BACKGROUND
  Left ventricular ejection fraction (LVEF) is an important indicator of left ventricular function and of the severity and prognosis of ischaemic heart disease. Assessment of regional function using the wall motion score index (WMSI) is an alternative means of evaluating left ventricular function.
  
  
  OBJECTIVE
  We attempted to evaluate LVEF by a method using the WMSI with cardiac magnetic resonance imaging (MRI).
  
  
  METHODS
  One hundred and twenty-two patients referred for evaluation of heart disease had rest WMSI evaluation by cardiac MRI. The WMSI was evaluated using the 16-segment model and score proposed by the American Society of Echocardiography. In our first group of 80 patients, a correlation between WMSI and cardiac MRI LVEF was established and a regression equation was derived. This regression equation was then used in 42 consecutive patients to compare WMSI LVEF with the gold standard MRI LVEF.
  
  
  RESULTS
  In the first 80 patients, MRI LVEF and WMSI correlated very well (r=0.93). Similarly, in the second group of 42 patients, WMSI LVEF derived from the regression equation correlated very well with MRI LVEF (r=0.94).
  
  
  CONCLUSIONS
  An objective evaluation of LVEF can be easily made using the WMSI with cardiac MRI, which correlates very well with standard MRI planimetric methods.
authors.affiliation: Hôpital du Sacré-Coeur de Montréal, université de Montréal, Canada. real.lebeau@yahoo.ca
authors.forename: Réal
authors.initials: R
authors.lastname: Lebeau
authors.forename: Karim
authors.initials: K
authors.lastname: Serri
authors.forename: Marie-Claude
authors.initials: MC
authors.lastname: Morice
authors.forename: Thomas
authors.initials: T
authors.lastname: Hovasse
authors.forename: Thierry
authors.initials: T
authors.lastname: Unterseeh
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Piéchaud
authors.forename: Jérôme
authors.initials: J
authors.lastname: Garot
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D005602:France; D006801:Humans; D007091:Image Processing, Computer-Assisted; D016014:Linear Models; D019028:Magnetic Resonance Imaging, Cine; D008297:Male; D008875:Middle Aged; D015588:Observer Variation; D011237:Predictive Value of Tests; D015203:Reproducibility of Results; D012720:Severity of Illness Index; D013318:Stroke Volume; D014463:Ultrasonography; D018487:Ventricular Dysfunction, Left / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000503:physiopathology; D016277:Ventricular Function, Left