Apical tissue tracking echocardiography for characterization of regional left ventricular function: Comparison with magnetic resonance imaging in patients after myocardial infarction

Tissue Doppler echocardiography and biventricular pacing in heart failure: Patient selection, procedural guidance, follow-up, quantification of success

“…TDI can accurately quantify regional left ventricular function [23]. Pulsed wave TDI does not allow simultaneous comparison of regional timing in different segments within one cardiac cycle.…”

Cardiac Image Modeling Tool for Quantitative Analysis of Global and Regional Cardiac Wall Motion

“…4,6,12,16,28 As a semi-automated technique, CIM does contain the subjective Interobserver variability was low in this study among short axis slices (p a range:0.65-0.87). By average p a , the most variability was found at apex short axis slice (p a ϭ 0.74) and the least variability at the middle short axis slice (average p a ϭ 0.81).…”

“…Despite advances in various modalities, cardiac wall motion analysis can be a rather subjective evaluation and can have significant interobserver and intraobserver variability. 4,5,12,16 To minimize the amount of time, the effect of geometric assumptions made during regional EF calculations, and the subjective input involved in analysis of cMRI studies, a semi-automated 3D reconstruction Cardiac Image Modeling tool (CIM 4.6; University of Auckland, Auckland, New Zealand) has been developed to quantitatively assess global and regional cardiac function. 17,18 CIM is a finite element model that creates a 3D reconstruction of the heart, based on user-defined guide points that customize the computer-generated tracings of endocardium and epicardium in both long and short axis magnetic resonance (MR) time series images ( Fig.…”

Assessment of the Myocardium on 2-Phase Cardiac Multidetector Computed Tomography

“…2) localized in the anteroseptal and anterior segments corresponded with a known decrease in contraction-velocity-time integrals in these segments as calculated by magnetic resonance tissuetracking techniques. 20 The assessment of myocardial perfusion on contrastenhanced MDCT series detected an analogous, yet diametrically reversed anticyclic variation in myocardial attenuation. During systolic contraction, the intramyocardial vasculature was compressed, and the myocardial blood pool subsequently drained, resulting in a decrease in myocardial attenuation; during diastole, there was the reverse effect from maximal perfusion of the myocardium, resulting in sharply demarcated high-attenuation plateaus on the isopycnic graph (Fig.…”