title: Initial clinical experience of real-time three-dimensional echocardiography in patients with ischemic and idiopathic dilated cardiomyopathy.
abstract: The geometry of the left ventricle in patients with cardiomyopathy is often sub-optimal for 2-dimensional ultrasound when assessing left ventricular (LV) function and localized abnormalities such as a ventricular aneurysm. The aim of this study was to report the initial experience of real-time 3-D echocardiography for evaluating patients with cardiomyopathy. A total of 34 patients were evaluated with the real-time 3D method in the operating room (n = 15) and in the echocardiographic laboratory (n = 19). Thirteen of 28 patients with cardiomyopathy and 6 other subjects with normal LV function were evaluated by both real-time 3-D echocardiography and magnetic resonance imaging (MRI) for obtaining LV volumes and ejection fractions for comparison. There were close relations and agreements for LV volumes (r = 0.98, p <0.0001, mean difference = -15 +/- 81 ml) and ejection fractions (r = 0.97, p <0.0001, mean difference = 0.001 +/- 0.04) between the real-time 3D method and MRI when 3 cardiomyopathy cases with marked LV dilatation (LV end-diastolic volume >450 ml by MRI) were excluded. In these 3 patients, 3D echocardiography significantly underestimated the LV volumes due to difficulties with imaging the entire LV in a 60 degrees x 60 degrees pyramidal volume. The new real-time 3D echocardiography is feasible in patients with cardiomyopathy and may provide a faster and lower cost alternative to MRI for evaluating cardiac function in patients.
authors.affiliation: Department of Cardiology, Kaufman Center for Heart Failure, The Cleveland Clinic Foundation, Ohio, USA. shiotat@cesmtp.ccf.org
authors.forename: T
authors.initials: T
authors.lastname: Shiota
authors.forename: P M
authors.initials: PM
authors.lastname: McCarthy
authors.forename: R D
authors.initials: RD
authors.lastname: White
authors.forename: J X
authors.initials: JX
authors.lastname: Qin
authors.forename: N L
authors.initials: NL
authors.lastname: Greenberg
authors.forename: S D
authors.initials: SD
authors.lastname: Flamm
authors.forename: J
authors.initials: J
authors.lastname: Wong
authors.forename: J D
authors.initials: JD
authors.lastname: Thomas
mesh_terms: D002306:Cardiac Volume / Q000502:physiology; D002311:Cardiomyopathy, Dilated / Q000000981:diagnostic imaging* / Q000601:surgery; D005240:Feasibility Studies; D006353:Heart-Assist Devices; D006801:Humans; D007091:Image Processing, Computer-Assisted; D017202:Myocardial Ischemia / Q000000981:diagnostic imaging* / Q000601:surgery; D012680:Sensitivity and Specificity; D013318:Stroke Volume / Q000502:physiology; D014463:Ultrasonography; D016277:Ventricular Function, Left / Q000502:physiology