Usefulness of echocardiographic tissue synchronization imaging to predict acute response to cardiac resynchronization therapy

Patient assessment for cardiac resynchronization therapy: Past, present and future of imaging techniques

“…It is then possible to identify regions of interest from apical views, and generate time-velocity tracings (quantitative analyses). In a pilot study conducted by Gorcsan et al (38), a cut-off value of 65 ms or more between opposite LV walls predicted acute LVESV diminution of 15% or more, with a sensitivity of 87% and a specificity of 100%. In a singlecentre study, Yu et al (39) used TSI to predict the response to CRT.…”

Right Ventricular Pacing and Mechanical Dyssynchrony

“…The use of TVI for assessing the synchrony of the contracting myocardium is widely supported in the literature (Bax et al 2004;Gorcsan et al 2004;Suffoletto et al 2006;Yu et al 2005). However, it is sometimes difficult to identify which systolic velocity is the peak velocity, due to multiple or jagged peaks in the velocity curves.…”

Effects of Region of Interest Tracking on the Diagnosis of Left Ventricular Dyssynchrony from Doppler Tissue Images

“…Ten of the most commonly cited studies using color DTI to measure ventricular dyssynchrony [6][7][8][9][10][11][12][13][14][15] failed to specify whether the authors used a tracked or stationary ROI.…”

“…5 Importantly, many authors have omitted the description of whether or not ROI tracking was employed. [6][7][8][9][10][11][12][13][14][15] The second post-processing step required to diagnose dyssynchrony using DTI is to compare the velocity-time curves from different myocardial walls to generate a quantitative value of dyssynchrony. Unfortunately, there is no accepted parameter for calculating dyssynchrony.…”