scholarly journals Speckle Tracking in Fetal Echocardiography—Generation of Reference Values of Global Longitudinal Strain for Quantification of Atrial, Ventricular, and Biventricular Fetal Heart Function

2019 ◽  
Author(s):  
M. Meister ◽  
O. Graupner ◽  
M. Götte ◽  
A. Wolter ◽  
V. Müller ◽  
...  
Keyword(s):  
Reference Values ◽  
Speckle Tracking ◽  
Longitudinal Strain ◽  
Fetal Heart ◽  
Heart Function ◽  
Fetal Echocardiography ◽  
Global Longitudinal Strain

The prognostic value of standardized reference values for speckle-tracking global longitudinal strain in hypertrophic cardiomyopathy

2015 ◽  
Vol 31 (3) ◽  
pp. 557-565 ◽  
Author(s):  
Gregory R. Hartlage ◽  
Jonathan H. Kim ◽  
Patrick T. Strickland ◽  
Alan C. Cheng ◽  
Nima Ghasemzadeh ◽  
...  
Keyword(s):  
Hypertrophic Cardiomyopathy ◽  
Reference Values ◽  
Speckle Tracking ◽  
Prognostic Value ◽  
Longitudinal Strain ◽  
Global Longitudinal Strain

scholarly journals Quantitative evaluation of fetal ventricular function by speckle tracking echocardiography

2021 ◽  
Author(s):  
Ling Luo ◽  
Hanmin Liu ◽  
Shu Zhou ◽  
Fuming Zhao ◽  
Qi Zhu ◽  
...  
Keyword(s):  
Speckle Tracking ◽  
Longitudinal Strain ◽  
Speckle Tracking Echocardiography ◽  
Fetal Heart ◽  
Global Longitudinal Strain ◽  
Heart Rhythm ◽  
Left Ventricular ◽  
Negative Group ◽  
Fetal Abnormality ◽  
Positive Group

Methods The study included 59 patients with normal fetal heart structure, blood flow, and heart rhythm (fetal abnormality-negative group) and 50 patients with abnormal fetal heart structure, blood flow, and/or heart rhythm (fetal abnormality-positive group). aCMQ was performed in both groups to obtain left and right ventricular endocardial global longitudinal strain (GLSendo), mid-myocardial global longitudinal strain (GLSmid), and epicardial global longitudinal strain (GLSepi). Parameters between the two groups were compared and correlation analyses performed. A deformation analysis was performed by two trained observers, and reproducibility was assessed. Results The fetal left ventricular and right ventricular global longitudinal strain (LV-GLS and RV-GLS, respectively) decreased in a gradient from the endocardium to the epicardium. LV-GLS and RV-GLS of all myocardial layers were lower in the fetal abnormality-positive than -negative group (all P<0.05). Correlation analysis showed that neither LV-GLS nor RV-GLS was significantly correlated with gestational age in the fetal abnormality-negative group (all P>0.05), whereas left ventricular GLSendo, GLSmid, and GLSepi were negatively correlated with gestational age in the fetal abnormality-positive group (r=−0.39 to −0.44, all P<0.05). Repeatability testing showed that the inter-observer and intra-observer intraclass correlation coefficients for LV-GLS and RV-GLS in each myocardial layer were >0.75 (all P<0.001). Conclusions As a new speckle tracking echocardiography tool, aCMQ has feasibility and repeatability in evaluating myocardial deformation of the fetal ventricle. This technique might provide helpful information on ventricular myocardial deformation in fetal hearts with abnormal structure or rhythm for clinical guidance in pregnancy.

Layer-specific strain analysis by speckle tracking echocardiography reveals differences in left ventricular function between rats and humans

2010 ◽  
Vol 299 (3) ◽  
pp. H664-H672 ◽  
Author(s):  
Noa Bachner-Hinenzon ◽  
Offir Ertracht ◽  
Marina Leitman ◽  
Zvi Vered ◽  
Sara Shimoni ◽  
...  
Keyword(s):  
Speckle Tracking ◽  
Longitudinal Strain ◽  
Speckle Tracking Echocardiography ◽  
Heart Function ◽  
Global Longitudinal Strain ◽  
Radial Strain ◽  
Strain Analysis ◽  
Left Ventricular ◽  
Lv Function ◽  
Disease States

The rat heart is commonly used as an experimental model of the human heart in both health and disease states, assuming that heart function of rats and humans is alike. When studying a rat model, echocardiography is usually performed on sedated rats, whereas standard echocardiography on adult humans does not require any sedation. Since echocardiography results of sedated rats are usually inferred to alert humans, in the present study, we tested the hypothesis that differences in left ventricular (LV) function may be present between rats sedated by a low dose of ketamine-xylazine and alert humans. Echocardiography was applied to 110 healthy sedated rats and 120 healthy alert humans. Strain parameters were calculated from the scans using a layer-specific speckle tracking echocardiography program. The results showed that layer longitudinal strain is equal in rats and humans, whereas segmental strain is heterogeneous ( P < 0.05) in a different way in rats and humans ( P < 0.05). Furthermore, layer circumferential strain is larger in humans ( P < 0.001), and the segmental results showed different segmental heterogeneity in rats and humans ( P < 0.05). Radial strain was found to be homogeneous at the apex and papillary muscle levels in humans and heterogeneous in rats ( P < 0.001). Additionally, whereas LV twist was equal in rats and humans, in rats the rotation was larger at the apex ( P < 0.01) and smaller at the base ( P < 0.001). The torsion-to-shortening ratio parameter, which indicates the transmural distribution of contractile myofibers, was found to be equal in rats and humans. Thus, when evaluating LV function of sedated rats under ketamine-xylazine, it is recommended to measure the global longitudinal strain, LV twist, and torsion-to-shortening ratio, since no scaling is required when converting these parameters and inferring them to humans.

scholarly journals Subtle right ventricular dysfunction in asymptomatic chronic heavy cigarette smokers: a speckle tracking case-control study

2021 ◽  
Vol 73 (1) ◽  
Author(s):  
Mohammad Iqbal Janhangeer ◽  
Ghada Youssef ◽  
Weal El Naggar ◽  
Dalia El Remisy
Keyword(s):  
Cigarette Smoking ◽  
Right Ventricular ◽  
Ventricular Function ◽  
Right Ventricular Function ◽  
Speckle Tracking ◽  
Longitudinal Strain ◽  
Global Longitudinal Strain ◽  
Cigarette Consumption ◽  
Cigarette Smokers ◽  
The Right

Abstract Background Chronic heavy cigarette smoking can affect the right ventriclular function. The standard echocardiography may not show early right ventricular functional changes, and a more sensitive measure is needed. The aim of this work was to evaluate the subtle subclinical effects of chronic heavy cigarette smoking on the right ventricular function. The study included 55 healthy asymptomatic chronic heavy cigarette smokers (smoking history of at least 5 pack-years and a daily cigarette consumption of at least 1 pack) and 35 healthy non-smoking control subjects. Patients underwent a full clinical assessment and a conventional as well as a 2D-speckle tracking transthoracic echocardiography of the right ventricle and data was compared between the 2 groups. Results The mean age was 32.9 ± 7.2 years in smokers and 30.9 ± 7.9 years in non-smokers (p = 0.227). The 2 groups showed comparable conventional right ventricular systolic and diastolic functions. Smokers showed a significantly lower (less negative) right ventricular global longitudinal strain (− 19.0 ± 3.2% vs. − 24.5 ± 3.5%, p < 0.001). Patients with a higher daily cigarette consumption showed a poorer right ventricular global longitudinal strain (p = 0.014). Conclusion Chronic heavy cigarette smoking can adversely affect the right ventricular function, a finding that can be easily missed by conventional echocardiography and can be better detected by the right ventricular speckle tracking.

scholarly journals Relationship between left atrial strain and left atrial bipolar voltage in patients undergoing catheter ablation for atrial fibrillation

2020 ◽  
Vol 41 (Supplement_2) ◽  
Author(s):  
Y Takahashi ◽  
T Kitai ◽  
T Watanabe ◽  
T Fujita
Keyword(s):  
Atrial Fibrillation ◽  
Left Atrial ◽  
Speckle Tracking ◽  
Longitudinal Strain ◽  
Low Voltage ◽  
Pulmonary Veins ◽  
Global Longitudinal Strain ◽  
Inferior Wall ◽  
Bipolar Voltage ◽  
Global Mean

Abstract Background Low-voltage zone (LVZ) in the left atrium (LA) seems to represent fibrosis. LA longitudinal strain assessed by speckle tracking method is known to correlate with the extent of fibrosis in patients with mitral valve disease. Purpose We sought to identify the relationship between LA longitudinal strain and LA bipolar voltage in patients with atrial fibrillation (AF). We tested the hypothesis that LA strain can predict LA bipolar voltage. Methods A total of 96 consecutive patients undergoing initial AF ablation were analyzed. All patients underwent transthoracic echocardiography including 2D speckle tracking measurement on the day before ablation during sinus rhythm (SR group, N=54) or during AF (AF group, N=42). LA longitudinal strain was measured at basal, mid, and roof level of septal, lateral, anterior, and inferior wall in apical 4- and 2-chamber view. Global longitudinal strain (GLS) was defined as an average value of the 12 segments. LA voltage map was created using EnSite system, and global mean voltage was defined as a mean of bipolar voltage of the whole LA excluding pulmonary veins and left atrial appendage. LVZ was defined as less than 1.0 mV. Results There was a significantly positive correlation between GLS and global mean voltage (r=0.708, p&lt;0.001). Multivariate regression analysis showed that GLS and age were independent predictors of global mean voltage. There was a significant negative correlation between global mean voltage and LVZ areas. Conclusions There was a strong correlation between LA longitudinal strain and LA mean voltage. GLS can independently predict LA mean voltage, subsequently LVZ areas in patients with AF. Funding Acknowledgement Type of funding source: None

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