title: Anatomic M-mode, a pertinent tool for the daily practice of transthoracic echocardiography.
abstract: OBJECTIVE
  We sought to compare anatomic M-mode (AMM), a new echocardiographic postprocessing option, and conventional M-mode (CMM) using fundamental imaging and tissue harmonic imaging.
  
  
  METHODS
  Transthoracic echocardiography was performed in 15 selected patients to analyze the reproducibility of AMM and in 47 patients to assess its clinical value versus CMM. Acquisitions were performed successively: CMM fundamental imaging; CMM tissue harmonic imaging; tissue harmonic imaging cineloops for AMM; and fundamental imaging cineloops for AMM. Quantitative analysis was performed offline. The angle alpha between the CMM line and the septal endocardial interface was calculated and the expected percentage of error in measuring left ventricular diameter was derived.
  
  
  RESULTS
  AMM analysis was reproducible. Optimal AMM full echocardiographic definition was obtainable in 77% of the population, whereas CMM was optimal for 49% because of scan line misalignment, causing a measurement overestimation exceeding 5%.
  
  
  CONCLUSIONS
  The ability with AMM to reduce the alpha angle to 0 degrees and, thus, avoid overestimation of left ventricular dimensions might improve follow-up in several pathologic conditions.
authors.affiliation: Department de Cardiologie, Centre Hospitaler Universitaire La Miletrie, Poitiers, France. e.donal@chu-poitiers.fr
authors.forename: Erwan
authors.initials: E
authors.lastname: Donal
authors.forename: Damien
authors.initials: D
authors.lastname: Coisne
authors.forename: Ban
authors.initials: B
authors.lastname: Pham
authors.forename: Stephanie
authors.initials: S
authors.lastname: Ragot
authors.forename: Daniel
authors.initials: D
authors.lastname: Herpin
authors.forename: James D
authors.initials: JD
authors.lastname: Thomas
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003324:Coronary Artery Disease / Q000000981:diagnostic imaging*; D004452:Echocardiography / Q000379:methods*; D005240:Feasibility Studies; D005260:Female; D006801:Humans; D007089:Image Enhancement; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results