Effects of Ultrasound Contrast During Tissue Velocity Imaging on Regional Left Ventricular Velocity, Strain, and Strain Rate Measurements

2006 ◽  
Vol 19 (1) ◽  
pp. 40-47 ◽  
Author(s):  
Siri Malm ◽  
Sigmund Frigstad ◽  
Asbjorn Stoylen ◽  
Hans Torp ◽  
Einar Sagberg ◽  
...  
Keyword(s):  
Strain Rate ◽  
Left Ventricular ◽  
Tissue Velocity ◽  
Ultrasound Contrast ◽  
Velocity Imaging ◽  
Strain And Strain Rate

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.

Color-coded longitudinal interventricular septal tissue velocity imaging, strain and strain rate in healthy Doberman Pinschers

2011 ◽  
Vol 13 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Julia Simak ◽  
Lisa Keller ◽  
Markus Killich ◽  
Katrin Hartmann ◽  
Gerhard Wess
Keyword(s):  
Strain Rate ◽  
Tissue Velocity ◽  
Velocity Imaging ◽  
Strain And Strain Rate ◽  
Doberman Pinschers

scholarly journals Left Ventricular Adaptations in Herding Dogs

2019 ◽  
Vol 47 (1) ◽  
Author(s):  
Raimy Costa Martins ◽  
João Paulo Da Exaltação Pascon ◽  
Karen Guzmán Béltran ◽  
Maria Ligia De Arruda Mistieri
Keyword(s):  
Physical Activity ◽  
Physical Exercise ◽  
Strain Rate ◽  
Blood Pressure Measurement ◽  
Left Ventricular ◽  
Tei Index ◽  
Strain And Strain Rate ◽  
Deformation Velocity ◽  
Conventional Echocardiography ◽  
Exercise In Humans

Background: Athlete’s heart syndrome comprises a set of functional and anatomic cardiac changes secondary to intense and prolonged physical exercise in humans and animals. The heart adapts to the type of activity performed, and Doppler echocardiography is the best tool for identifying these changes. Speckle tracking echocardiography (STE) has provided new data on cardiovascular adaptations secondary to physical exercise in humans, information that conventional echocardiography cannot provide. Although physical activity and work in dogs are well documented, there are few studies on cardiovascular adaptations secondary to exercise in dogs, and no studies to date evaluated these adaptations using STE.Materials, Methods &Results:A total of 31 dogs of the Border Collie and OvelheiroGaúchoBrasileiro breeds were divided into two groups: a herding group (HG, n = 15), which performed herding activity five to six times a week for at least 4 months, and a sedentary group (SG, n = 16), with no history of physical activity in the past twelve months. All dogs were previously subjected to electrocardiography and blood pressure measurement. After that, the animals underwent echocardiographic examination at rest at a single time point. The data were analyzed by two-way multivariate analysis of variance (ANOVA) at a level of significance of 5% (P < 0.05) and a trend at 90% (P < 0.1). The dogs of the HG had higher values for left-ventricular end-systolic diameter (LVESD) and systolic volume (SV), and lower values for left-ventricular myocardial performance index (Tei index) and systolic septal movement. STE results indicated that the HG presented lower values for strain and strain rate in some myocardial segments in the radial, circumferential, longitudinal, and transverse directions.Discussion:The increase in LVESD is justified by the increase in preload (volume) required to meet the increased oxygen demand, whereas SV is directly related to the Frank-Starling mechanism. The lower Tei index in the HG indicates better systolic-diastolic performance, explained by a shorter isovolumetric relaxation time and isovolumetric contraction time and by an increase in left ventricular (LV) ejection time. Similar results were not observed in LV systolic wall motion. Therefore, we believe that the most likely explanation is a higher systolic efficiency, associated with lower energy demand at rest. According to STE criteria, the lower strain and strain rate in the HG in some myocardial segments in all directions suggest less need for myocardial deformation and lower deformation velocity in order to maintain systolic function. In conclusion, conventional echocardiography and STE were complementary and fundamental to understand cardiovascular adaptations in herding dogs.

scholarly journals Do left atrial strain and strain rate reflect intrinsic atrial function, or are they determined by left ventricular function?

2015 ◽  
pp. 539-548 ◽  
Author(s):  
Andrei Dumitru Margulescu ◽  
Emma Rees ◽  
Rose-Marie Coulson ◽  
Aled D. Rees ◽  
Dragos Vinereanu ◽  
...  
Keyword(s):  
Left Ventricular Function ◽  
Strain Rate ◽  
Ventricular Function ◽  
Left Atrial ◽  
Left Ventricular ◽  
Atrial Function ◽  
Left Atrial Strain ◽  
Strain And Strain Rate ◽  
Atrial Strain

scholarly journals Left ventricular strain and strain rate in a general population

2008 ◽  
Vol 29 (16) ◽  
pp. 2014-2023 ◽  
Author(s):  
T. Kuznetsova ◽  
L. Herbots ◽  
T. Richart ◽  
J. D'hooge ◽  
L. Thijs ◽  
...  
Keyword(s):  
General Population ◽  
Strain Rate ◽  
Left Ventricular ◽  
Left Ventricular Strain ◽  
Strain And Strain Rate

scholarly journals P1394 Left atrial strain as a tool to explore disturbed system biology involving cerebral cognition in diabetes: A sub study of the European multicenter MOPEAD project

2020 ◽  
Vol 21 (Supplement_1) ◽  
Author(s):  
S K Saha ◽  
A Kiotsekoglou ◽  
A Borysenko ◽  
A Gopal ◽  
S C Govind
Keyword(s):  
Type 2 Diabetes ◽  
Strain Rate ◽  
Left Atrial ◽  
System Biology ◽  
Left Ventricular ◽  
Lv Function ◽  
Right Ventricular Free Wall ◽  
Lv Dysfunction ◽  
Strain And Strain Rate

Abstract Funding Acknowledgements EU GRANT OnBehalf MOPEAD STUDY GROUP Background Although the 2D speckle tracking software (2DSTE-SW) has been irrevocably proved to be useful for quantification of left ventricular (LV) function, the same SW has also been used successfully in a plethora of cardiac illnesses using left atrial (LA) strain and strain rate, even in the absence of a dedicated LA SW. LA peak longitudinal strain during ventricular systole (LA-Reservoir strain%; LA-Res S), and strain rate during early (LA-SRE) and late (LA-SRA) phases constitute respectively the reservoir (LA-RS%), conduit, and booster pump functions of this chamber. The role of this dynamic function has not been investigated to assess cerebral cognition in type 2 diabetes (DM). Methods We enrolled thirty-nine subjects with DM and mild LV dysfunction (76 ± 5 years, 25 F) in the EU- funded MOPEAD (Models of Patient Engagement for Alzheimer’s Disease) project. Fifteen of them underwent standard echocardiography and 2DSTE. We assessed cerebral cognition using the standard MMSE (Mini-Mental Stage Examination) score: we considered a score of less than 28 as a surrogate of mild cognitive impairment (MCI+). Besides LA-Res strain, LA-SRE, LA-SRA, LV-GLS and right ventricular free wall strain (RV-FWS) were also computed (RV-FWS). Routine biochemistry included, among other, HbA1c and NT-proBNP. Results Mean values of the 2D STE measures were LVGLS: 14± 3%, LAVI: 36± 21 ml/m2, LA -RS: 18 ±8 %, LA-SRE: 0.6± 0.3, and LA-SRA: 1.6± 0.4. RV FWS was 20± 5 %. HbA1c was 58 ± 16 mmol/mol. LVEF was 53± 7%. There was no difference in theses variable between MCI+ and those with normal cognition (MCI-). However, in the regression model, LA-Res S had the strongest association with MCI (P &lt; 0.01) (Fig), with excellent strength of association ( R2 = 0.8). LA-SRE, indexed LA volume, and NT-proBNP were not retained by the model (p &gt; 0.05). Conclusion LA reservoir strain may emerge as a useful tool to explore disturbed system biology involving extracardiac organ such as the brain in older adults with type 2 diabetes, in the background of mild LV dysfunction. Abstract P1394 Figure. Fig.Regression analysis

Reference values for two-dimensional myocardial strain echocardiography of the left ventricle in healthy children

2019 ◽  
Vol 29 (3) ◽  
pp. 325-337
Author(s):  
Laurens P. Koopman ◽  
Bas Rebel ◽  
Devi Gnanam ◽  
Mirthe E. Menting ◽  
Willem A. Helbing ◽  
...  
Keyword(s):  
Left Ventricle ◽  
Strain Rate ◽  
Longitudinal Strain ◽  
Circumferential Strain ◽  
Left Ventricular ◽  
Myocardial Deformation ◽  
Healthy Children ◽  
Deformation Parameters ◽  
Strain And Strain Rate ◽  
Echocardiographic Parameters

AbstractBackgroundMyocardial deformation by speckle tracking echocardiography provides additional information on left ventricular function. Values of myocardial deformation (strain and strain rate) depend on the type of ultrasound machine and software that is used. Normative values for QLAB (Philips) are scarce, especially for children. It is important to evaluate the influence of age and body size on myocardial deformation parameters, since anthropometrics strongly influence many standard echocardiographic parameters. The aim of this study was to provide comprehensive normal values for myocardial deformation of the left ventricle using a Philips platform and to evaluate the association with anthropometric and standard echocardiographic parameters.MethodsHealthy children between 1 and 18 years of age were prospectively examined using a standard echocardiographic protocol. Short-axis and apical four-chamber, two-chamber, and three-chamber views were used to measure peak systolic circumferential and longitudinal strain and systolic and early diastolic strain rate of the left ventricle using dedicated software.ResultsA total of 103 children were included with a mean age of 10.8 and inter-quartile range 7.3–14.3 years. Global circumferential strain values (±SD) were −24.2±3.5% at basal, −25.8±3.5% at papillary muscle, and −31.9±6.2% at apex levels. Global left ventricular longitudinal strain values were −20.6±2.6% in apical four-chamber view, −20.9±2.7% in apical two-chamber, and −21.0 ±2.7% in apical three-chamber. Age was associated with longitudinal strain, longitudinal systolic and early diastolic strain rate, but not with circumferential strain.ConclusionsNormal values for left ventricular deformation parameters in children are obtained using a Philips platform. Age partly explains normal variation of strain and strain rate.

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