Assessment of Left Ventricular Dyssynchrony in Myocardial Infarction Using 2D Speckle Tracking Imaging

Abstract

Background. The assessment of left ventricular (LV) dyssynchrony is increasingly important in clinical cardiology.Methods. The aim of this study was to evaluate LV dyssynchrony in patients with myocardial infarction (MI) using 2D speckle tracking imaging. Basal, middle and apical 2D LV short-axis images were acquired in 41 patients with MI and in 15 age-matched controls. Using 2D strain software, radial strain, circumferential strain, time interval from the R wave on the electrocardiogram to peak radial strain (Trs), and time to peak circumferential strain (Tcs) were measured in 6 segments at each level. To assess LV dyssynchrony, the following dyssynchrony indices were calculated: Trs(cs)-18SD: the standard deviation (SD) of Trs(cs) in all 18 segments, Trs(cs)-12SD: the SD of Trs(cs) in 6 basal and 6 mid segments, Trs(cs)-6SD: the SD of Trs(cs) in 6 basal segments.Results. Trs(cs)-18SD was significantly prolonged in the MI group when compared to age-matched controls. Trs(cs)-

Feature-Tracking Strain Derived from Compressed Sensing Cine Cardiovascular Magnetic Resonance Imaging for Myocardial Infarct Detection: A Feasibility Study

“…Three representative LV short-axial slices at the basal-, mid-, and apical levels were selected from both short-axial cine CMR and LGE-CMR images by an independent observer. Subsequently, a software algorithm semi-automatically segmented the LV myocardium into six equidistant segments according to the 18-segment model [9], and peak circumferential strain (p-CS) values were independently analyzed in both types of cine CMR images. Inter-observer agreement was assessed using images from 10 randomly selected patients (180 myocardial segments) who were examined by two experienced radiologists with 7 and 15 years of experience in CMR imaging analysis, respectively.…”

Heterogeneity of apex-to-base dispersion in diastolic lengthening is related to impaired global left ventricular relaxation in patients with hypertrophic cardiomyopathy

“…Recently, an ultrasonic two-dimensional tissue tracking system (2DTT) has been introduced to evaluate regional myocardial function by tracing the myocardium, based on a pattern-matching algorithm [10,11]. The 2DTT has the capability to evaluate regional LV function in a clinical setting by placing regions of interest in the subendocardium without angle dependency [12][13][14].…”