title: Influence of measurement inaccuracies on determination of left ventricular mass by M mode echocardiography.
abstract: OBJECTIVE
  To determine to what extent inaccuracies in measuring the end diastolic diameter of the left ventricle, the interventricular septum, and the posterior wall, by M mode echocardiography influence the left ventricular mass calculated by the Devereux's formula.
  
  
  METHODS
  Mathematical model.
  
  
  RESULTS
  Relatively small measurement inaccuracies such as 5%, which are known to be inherent in the echocardiographic method, will result in "changes" of left ventricular mass in the range of 8% to 15%. This is equivalent to expected changes in left ventricular mass seen during treatment.
  
  
  CONCLUSIONS
  The use of Devereux's formula to calculate left ventricular mass is limited by measurement inaccuracies in individual patients.
authors.affiliation: Zweite Medizinische Abteilung der Krankenanstalt Rudolfstiftung, Vienna, Austria.
authors.forename: C
authors.initials: C
authors.lastname: Stöllberger
authors.forename: I
authors.initials: I
authors.lastname: Holländer
authors.forename: L
authors.initials: L
authors.lastname: Dimitrov
authors.forename: J
authors.initials: J
authors.lastname: Slany
mesh_terms: D003971:Diastole; D004452:Echocardiography; D006352:Heart Ventricles / Q000000981:diagnostic imaging*; D006801:Humans; D006973:Hypertension / Q000188:drug therapy; D008433:Mathematics; D008954:Models, Biological; D012680:Sensitivity and Specificity