title: Comparison of methods of fractional area change for detection of regional left ventricular dysfunction.
abstract: Three methods for assessment of fractional area change (FAC) and conventional versus cross-sectional segmentation were compared under conditions known to occur frequently during stress echocardiography. Quantitative analysis of 80 echocardiograms obtained from healthy subjects, patients with left ventricular (LV) dysfunction and after coronary artery bypass grafting included segmental and cross-sectional FACs by the centroid method with fixed and floating reference and a method with floating external reference. All segmental and cross-sectional FACs were equally sensitive to LV dysfunction, and segmental FACs failed to accurately predict the location of coronary lesions. The centroid method with floating reference and cross-sectional FACs were the least affected by surgery induced intrathoracic heart motion. In moderate to severe LV dysfunction FAC by the centroid method with floating reference and cross sections were rarely within normal limits. Cross-sectional FACs may prove to be useful in stress echocardiography. For viability studies segmental FAC by fixed reference appears to be the method of choice.
authors.affiliation: Department of Medicine B, The Heart Centre at Rigshospitalet, University of Copenhagen, Denmark. sc@dadlnet.dk
authors.forename: S
authors.initials: S
authors.lastname: Carstensen
authors.forename: U
authors.initials: U
authors.lastname: Hoest
authors.forename: L
authors.initials: L
authors.lastname: Kjoeller-Hansen
authors.forename: K
authors.initials: K
authors.lastname: Saunamäki
authors.forename: D
authors.initials: D
authors.lastname: Atar
authors.forename: H
authors.initials: H
authors.lastname: Kelbaek
mesh_terms: D000328:Adult; D000368:Aged; D000704:Analysis of Variance; D017023:Coronary Angiography; D001026:Coronary Artery Bypass / Q000379:methods; D003326:Coronary Circulation / Q000502:physiology*; D003327:Coronary Disease / Q000000981:diagnostic imaging* / Q000601:surgery; D003430:Cross-Sectional Studies; D004452:Echocardiography / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012016:Reference Values; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D018487:Ventricular Dysfunction, Left / Q000000981:diagnostic imaging* / Q000503:physiopathology