scholarly journals Strain rate imaging is superior to tissue velocity imaging for measuring atrioventricular time interval in the fetus

2003 ◽  
Vol 41 (6) ◽  
pp. 494 ◽  
Author(s):  
Azaria J.J.T. Rein ◽  
Zeev Perles ◽  
Amiram Nir ◽  
Ikuo Hashimoto ◽  
Xiaokui Li ◽  
...  
Keyword(s):  
Strain Rate ◽  
Time Interval ◽  
Tissue Velocity ◽  
Strain Rate Imaging ◽  
Velocity Imaging

scholarly journals Longitudinal Tissue Velocity and Deformation Imaging in Patients with Significant Stenosis of Left Anterior Descending Artery

2019 ◽  
Vol 4 (1) ◽  
Author(s):  
Reyhaneh Zavar ◽  
Hakimeh Sadeghian ◽  
Masoumeh Lotfi-Tokaldany ◽  
Mohammad Moein Ashrafi ◽  
Mahmood Sheikh Fathollahi ◽  
...  
Keyword(s):  
Strain Rate ◽  
Wall Motion ◽  
Peak Systolic Velocity ◽  
Tissue Velocity ◽  
Strain Rate Imaging ◽  
Velocity Imaging ◽  
Specificity And Sensitivity ◽  
Significant Difference ◽  
Normal Wall ◽  
The Mean

 Introduction: Myocardial longitudinal tissue velocity imaging (TVI) and strain rate imaging (SRI) indices may have a role in the prediction of significant proximal stenosis of left anterior descending (LAD) by echocardiography. Materials And Methods: Total 20 patients with proximal LAD stenosis >70% by angiography and ejection fraction ≥50%, without wall motion abnormality at resting echo (stenotic group) and 20 angiographically normal coronaries subjects with normal echocardiography (non-stenotic group) were included in the study. SRI and TVI were performed in nine segments of the LAD territory at rest. Parameters of interest included: peak systolic strain (ST, %), strain rate (SR, Second-1), and peak systolic velocity (Sm, cm/s). Results: Overal mean ST and SR showed a significant reduction in the stenotic group compared to non-stenotic group (P<0.001), while the mean Sm had no significant difference. A segment-by-segment comparison revealed a reduction of ST in 4/9 (two apical and two anteroseptal) and SR in 5/9 (three apical, septal, and anteroseptal midportion) in the stenotic group (P<0.05). Both ST and SR showed a significant reduction in three segments: anterior-apical, lateral-apical, and anteroseptal-midportion. When both ST and SR decreased in one segment, specificity and sensitivity for the diagnosis of proximal LAD stenosis was more than 80% and 55%, respectively, by Roc analysis. Conclusion: There is an overall reduction in the mean ST and SR in the segments of LAD territory with significant proximal stenosis and normal wall motion at rest and an acceptable specificity and sensitivity of SRI for the detection of stenosis in these segments.

Normal values for tissue velocity and strain rate imaging parameters of left and right atrial myocardium in normal subjects

2019 ◽  
Author(s):  
Azam Safir‐Mardanloo ◽  
Mani Khorsand Askari ◽  
Masoumeh‐ Lotfi Tokaldany ◽  
Mohammad Moein Ashrafi ◽  
Hakimeh Sadeghian
Keyword(s):  
Strain Rate ◽  
Normal Values ◽  
Normal Subjects ◽  
Right Atrial ◽  
Atrial Myocardium ◽  
Imaging Parameters ◽  
Tissue Velocity ◽  
Strain Rate Imaging ◽  
Left And Right

scholarly journals Evaluation of Longitudinal Tissue Velocity and Deformation Imaging in Akinetic Non-viable Apical Segments of Left Ventricular Myocardium

2018 ◽  
Vol 3 (4) ◽  
Author(s):  
Hakimeh Sadeghian ◽  
Parastoo Vosoughi ◽  
Afsaneh Sadeghian ◽  
Masoumeh Lotfi-Tokaldany ◽  
Mohammad Moein Ashrafi ◽  
...  
Keyword(s):  
Strain Rate ◽  
Patient Group ◽  
Dobutamine Stress Echocardiography ◽  
Peak Systolic Velocity ◽  
Dobutamine Stress ◽  
Left Ventricular ◽  
Systolic Strain ◽  
Tissue Velocity ◽  
Strain Rate Imaging ◽  
Strain And Strain Rate

Introduction: The use of tissue velocity and strain rate imaging is proposed for the quantification of non-viable myocardium. This study is aimed at investigating the differences in tissue velocity and strain rate imaging indices between non-viable left ventricular apical segments and the normal segments using segment-by-segment comparison.Materials and Method: Thirty-two patients with akinetic left ventricular apical segments and without viability were selected using two-dimensional echocardiography and dobutamine stress echocardiography; 32 individuals with normal echocardiography and coronary angiography formed the normal group. Peak systolic velocity, peak systolic strain, and strain rate were measured in the four left ventricular apical segments and the apex 17th segment.Results: The patient group had a significantly lower ejection fraction (26.88±6.06% vs. 56.56±2.36%; p<0.001). Overall, the patient group had significantly lower resting peak systolic velocity, systolic strain, and strain rate. In the segment-by-segment comparison, only systolic strain showed a remarkable reduction in the patient group, while reduction in Sm and strain rate were not significant in all the segments. After dobutamine stress echocardiography, only systolic strain showed an insignificant increase compared to the resting values. In the apex 17th segment, Sm showed significant reduction in the patient group.Conclusion: The ST in apical segments may be used as a quantitative index for detecting akinesia both at rest and after dobutamine infusion. Reduction in Sm can be used as a marker of akinesia in the apical cap at rest.

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