Tomoko Kamata

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BACKGROUND A new transthoracic echocardiography (TTE) technique allows multi-layer measurement of left ventricular (LV), endocardial, epicardial, and whole layer myocardial strain. We evaluated interobserver and intraobserver TTE reproducibility for 2D LV global longitudinal (GLS) and circumferential strain (GCS) estimates using data from severe aortic(More)
PURPOSE To detect stable ischemic left ventricular (LV)-segments confirmed via invasive fractional flow reserve (FFR) by quantitative longitudinal-strain (LS) determined using resting multilayer TTE. METHODS A retrospective analysis of 39 stable patients (32 males; 65.8±11.9years) with 46 coronary arteries with ≥50% stenosis confirmed by invasive coronary(More)
PURPOSE This study evaluated the post-systolic strain index (PSI), and the time interval between aortic valve closure (AVC) and regional peak longitudinal strain (PLS), measured by transthoracic echocardiography (TTE), for detection of left ventricular (LV) myocardial ischemic segments confirmed by invasive fractional flow reserve (FFR). MATERIALS AND(More)
PURPOSE In order to evaluate compensatory mechanisms in hypertrophic-cardiomyopathy (HCM) subjects with preserved left-ventricular (LV) ejection-fraction (EF), we measured myocardial percentage endocardial strain dependency, as represented by 2D LV global longitudinal (GLS) and circumferential-strain (GCS), using a novel, multi-layer, speckle-tracking(More)