title: Left ventricular wall motion analysis using real-time three-dimensional ultrasound.
abstract: This study tested the ability of real-time 3-D (RT 3-D) echocardiography to detect and delineate regions of abnormal contraction (akinesia or dyskinesia) in a canine model of regional myocardial injury and to develop methods to simplify injury assessments. Closed chest RT 3-D scans were obtained and regional left ventricular (LV) contractile function was assessed in nine animals at baseline and after myocardial cryoinjury with a 1-cm cryoprobe. Evaluation of contractile function was based on radial shortening of LV chamber cross-sections at multiple levels. Radial length changes were analyzed using color-coded circumferential maps of the LV. Seven sets of motion maps demonstrated new areas of poorly contracting myocardium in the cryoinjured region relative to baseline. Two sets of data were excluded due to insufficient LV visualization. Motion maps derived from RT 3-D echo have the ability to detect and localize regions of abnormal LV wall motion.
authors.affiliation: Center for Emerging Cardiovascular Technologies, Duke University, Durham, NC 27708, USA. johnny.kuo@duke.edu
authors.forename: J
authors.initials: J
authors.lastname: Kuo
authors.forename: B Z
authors.initials: BZ
authors.lastname: Atkins
authors.forename: K A
authors.initials: KA
authors.lastname: Hutcheson
authors.forename: O T
authors.initials: OT
authors.lastname: von Ramm
mesh_terms: D000818:Animals; D004195:Disease Models, Animal; D004285:Dogs; D019560:Echocardiography, Three-Dimensional / Q000379:methods*; D005615:Freezing; D006335:Heart Injuries / Q000000981:diagnostic imaging* / Q000503:physiopathology; D006352:Heart Ventricles / Q000000981:diagnostic imaging / Q000503:physiopathology; D007090:Image Interpretation, Computer-Assisted / Q000379:methods; D008955:Models, Cardiovascular; D009200:Myocardial Contraction / Q000502:physiology; D018487:Ventricular Dysfunction, Left / Q000000981:diagnostic imaging* / Q000503:physiopathology