Myocardial Strain and Strain Rate Imaging: Comparison between Doppler Derived Strain Imaging and Speckle Tracking Echocardiography

2013 ◽  
Vol 1 (1) ◽  
pp. 20-1 ◽  
Author(s):  
Anita Sadeghpour
Keyword(s):  
Strain Rate ◽  
Speckle Tracking ◽  
Speckle Tracking Echocardiography ◽  
Myocardial Strain ◽  
Strain Imaging ◽  
Strain Rate Imaging ◽  
Strain And Strain Rate

scholarly journals Transverse Right Ventricle Strain and Strain Rate Assessed by 2-Dimensional Speckle Tracking Echocardiography in Dogs with Pulmonary Hypertension

2020 ◽  
Vol 7 (1) ◽  
pp. 19 ◽  
Author(s):  
Domenico Caivano ◽  
Mark Rishniw ◽  
Francesco Birettoni ◽  
Vasilica-Flory Petrescu ◽  
Francesco Porciello
Keyword(s):  
Pulmonary Hypertension ◽  
Right Ventricle ◽  
Strain Rate ◽  
Speckle Tracking ◽  
Speckle Tracking Echocardiography ◽  
Radial Strain ◽  
Transverse Strain ◽  
Strain Component ◽  
Strain And Strain Rate ◽  
Healthy Dogs

Right ventricular (RV) strain analysis using 2-dimensional speckle tracking echocardiography (2D STE) permits practitioners to assess regional and global deformation of the myocardium. Recently, assessment of the longitudinal right ventricle (RV) strain and strain rate using 2D STE has been reported in dogs. Although longitudinal deformation is the dominant component of the RV systole, RV myocardial fibers of the superficial layer are oriented circumferentially and these contribute to the RV pump function (radial deformation). Because this strain component has not been investigated in dogs, we have assessed radial RV strain and strain rate using 2D STE in healthy dogs and dogs with pulmonary hypertension (PH). We have recruited 74 dogs (40 healthy dogs and 34 dogs with PH) in which we have analyzed radial RV free wall strain and strain rate using XstrainTM software. We have used the left apical 4-chamber view optimized for the RV for analysis of the radial strain and strain rate variables (XstrainTM software denoted radial strain as “transverse”). Seven dogs were excluded during the analysis for low quality images. Transverse strain and strain rate obtained in healthy dogs showed no relationship with heart rate, body weight or age (r2 < 0.09 and p > 0.05 for all variables). Moreover, no relationship between transverse strain/strain rate variables and left atrial-to-aortic ratios was observed (r2 < 0.06 and p = 0.2, for both). Transverse strain and strain rate obtained in dogs with PH, showed weak negative relationships with tricuspid regurgitation velocity (r2 < 0.25 and p = 0.006, for both). Transverse RV strain and strain rate using 2D STE is feasible in most dogs and decrease with worsening of the PH, but these advanced echocardiographic indices do not help in identifying dogs with PH.

Abstract 3157: Coupling of Left Ventricular Relaxation to Systolic Contraction in Normal, Hypertrophied, and Dilated Myocardium Quantified by Speckle-Tracking Global Strain and Strain Rate Imaging

Circulation ◽  
2007 ◽  
Vol 116 (suppl_16) ◽  
Author(s):  
Takeshi Takamura ◽  
Kaoru Dohi ◽  
Katsuya Onishi ◽  
Naoki Fujimoto ◽  
Tairo Kurita ◽  
...  
Keyword(s):  
Ejection Fraction ◽  
Strain Rate ◽  
Speckle Tracking ◽  
Myocardial Dysfunction ◽  
Systolic Dysfunction ◽  
Disease Process ◽  
Left Ventricular ◽  
Strain Rate Imaging ◽  
Strain And Strain Rate ◽  
Contraction And Relaxation

Background: It has not been fully investigated whether impairments of left ventricular (LV) relaxation precede or couple to systolic dysfunction during the disease process ranged from latent myocardial dysfunction to failing myocardium in patients with either left ventricular hypertrophy (LVH) or dilated cardiomyopathy (DCM). Methods: To quantify global LV longitudinal (L) and circumferential (C) function, fifty-seven patients with hypertensive LVH (ejection fraction 58 ± 10 %), twenty-one patients with DCM (ejection fraction 33 ± 13 %), and fifty-seven normal controls (Controls: ejection fraction 65 ± 6 %) had echo-study with speckle-tracking strain and strain rate imaging (Vivid 7 and EchoPAC, GE Electronic) from apical 4-, 2-, long axis, and mid-ventricular short axis views. Global peak systolic strain (PSS) and peak relaxation rate (PRR) were used as indices of global LV contraction and relaxation, respectively. Results: PRR was significantly correlated to PSS from both (L) and (C) in LVH, DCM, and Controls with linear regressions, respectively (DCM (L); r = 0.81 * , (C); r = 0.81 * , LVH (L); r = 0.78 * , (C); r = 0.74 * , Control (L); r = 0.64 * , (C); r = 0.70 * , * p < 0.05). Furthermore, correlations between PSS and PRR were best fit with exponential regression from (L) and linear regression from (C) all through the subjects ((L); y = 0.18e -0.099x , r = 0.84 * , (C); y = −0.070x - 0.017, r = 0.79 * , * p < 0.05). Conclusion: Speckle-tracking strain and strain rate imaging exhibited the strong coupling of LV relaxation to systolic contraction ranged from the normal to failing myocardium regardless of their initiating disease process.

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