scholarly journals Echocardiography in the Assessment of Postsystolic Shortening of the Left Ventricle Myocardium of the Heart

Kardiologiia ◽  
2021 ◽  
Vol 60 (12) ◽  
pp. 110-116
Author(s):  
M. N. Alekhin ◽  
A. I. Stepanova
Keyword(s):  
Myocardial Contractility ◽  
Speckle Tracking Echocardiography ◽  
Quantitative Estimation ◽  
Myocardial Strain ◽  
Visual Assessment ◽  
Tissue Doppler ◽  
Left Ventricular ◽  
Modern Technologies ◽  
Considerable Experience ◽  
Left Ventricle Myocardium

Echocardiography allows evaluating left ventricular (LV) myocardial contractility; however, the visual assessment of contractility is subjective and requires considerable experience. Modern technologies for assessment of LV myocardial contractility, such as tissue Doppler and speckle-tracking echocardiography, provide quantitative estimation of various parameters of myocardial strain, including the LV postsystolic shortening. Several studies have demonstrated the value of postsystolic shortening for evaluation of myocardial ischemia and “ischemic memory” in patients with cardiovascular diseases. This review analyzes experimental and clinical studies that addressed LV postsystolic shortening. 

scholarly journals Speckle-Tracking Echocardiography With Novel High Frame-Rate Imaging

2021 ◽  
Author(s):  
Kana Fujikura ◽  
Mohammed Makkiya ◽  
Muhammad Farooq ◽  
Yun Xing ◽  
Wayne Humphrey ◽  
...  
Keyword(s):  
Temporal Resolution ◽  
Speckle Tracking ◽  
Speckle Tracking Echocardiography ◽  
Myocardial Strain ◽  
Left Ventricular ◽  
Frame Rate ◽  
High Frame Rate ◽  
Echocardiographic Images ◽  
The Impact ◽  
Normal Lvef

Background: global longitudinal strain (GLS) measures myocardial deformation and is a sensitive modality for detecting subclinical myocardial dysfunction and predicting cardiac outcomes. The accuracy of speckle-tracking echocardiography (STE) is dependent on temporal resolution. A novel software enables relatively high frame rate (Hi-FR) (~200 fps) echocardiographic images acquisition which empowers us to investigate the impact of Hi-FR imaging on GLS analysis. The goal of this pilot study was to demonstrate the feasibility of Hi-FR for STE. Methods: In this prospective study, we acquired echocardiographic images using clinical scanners on patients with normal left ventricular systolic function using Hi-FR and conventional frame rate (Reg-FR) (~50 FPS). GLS values were evaluated on apical 4-, 2- and 3-chamber images acquired in both Hi-FR and Reg-FR. Inter-observer and intra-observer variabilities were assessed in Hi-FR and Reg-FR. Results: There were 143 resting echocardiograms with normal LVEF included in this study. The frame rate of Hi-FR was 190 ± 25 and Reg-FR was 50 ± 3, and the heart rate was 71 ± 13. Strain values measured in Hi-FR were significantly higher than those measured in Reg-FR (all p < 0.001). Inter-observer and intra-observer correlations were strong in both Hi-FR and Reg-FR. Conclusions: We demonstrated that strain values were significantly higher using Hi-FR when compared with Reg-FR in patients with normal LVEF. It is plausible that higher temporal resolution enabled the measurement of myocardial strain at desired time point. The result of this study may inform clinical adoption of the novel technology. Further investigations are necessary to evaluate the value of Hi-FR to assess myocardial strain in stress echocardiography in the setting of tachycardia.

scholarly journals Regional and temporal changes in left ventricular strain and stiffness in a porcine model of myocardial infarction

2018 ◽  
Vol 315 (4) ◽  
pp. H958-H967 ◽  
Author(s):  
William M. Torres ◽  
Julia Jacobs ◽  
Heather Doviak ◽  
Shayne C. Barlow ◽  
Michael R. Zile ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Clinical Assessment ◽  
Speckle Tracking ◽  
Speckle Tracking Echocardiography ◽  
Myocardial Strain ◽  
Left Ventricular ◽  
Border Zone ◽  
Peak Strain ◽  
Myocardial Stiffness ◽  
Biomechanical Behavior

The aim of the present study was to serially track how myocardial infarction (MI) impacts regional myocardial strain and mechanical properties of the left ventricle (LV) in a large animal model. Post-MI remodeling has distinct regional effects throughout the LV myocardium. Regional quantification of LV biomechanical behavior could help explain changes in global function and thus advance clinical assessment of post-MI remodeling. The present study is based on a porcine MI model to characterize LV biomechanics over 28 days post-MI via speckle-tracking echocardiography (STE). Regional myocardial strain and strain rate were recorded in the circumferential, radial, and longitudinal directions at baseline and at 3, 14, and 28 days post-MI. Regional myocardial wall stress was calculated using standard echocardiographic metrics of geometry and Doppler-derived hemodynamic measurements. Regional diastolic myocardial stiffness was calculated from the resultant stress-strain relations. Peak strain and phasic strain rates were nonuniformly reduced throughout the myocardium post-MI, whereas time to peak strain was increased to a similar degree in the MI region and border zone by 28 days post-MI. Elevations in diastolic myocardial stiffness in the MI region plateaued at 14 days post-MI, after which a significant reduction in MI regional stiffness in the longitudinal direction occurred between 14 and 28 days post-MI. Post-MI biomechanical changes in the LV myocardium were initially limited to the MI region but nonuniformly extended into the neighboring border zone and remote myocardium over 28 days post-MI. STE enabled quantification of regional and temporal differences in myocardial strain and diastolic stiffness, underscoring the potential of this technique for clinical assessment of post-MI remodeling. NEW & NOTEWORTHY For the first time, speckle-tracking echocardiography was used to serially track regional biomechanical behavior and mechanical properties postmyocardial infarction (post-MI). We found that changes initially confined to the MI region extended throughout the myocardium in a nonuniform fashion over 28 days post-MI. Speckle-tracking echocardiography-based evaluation of regional changes in left ventricular biomechanics could advance both clinical assessment of left ventricular remodeling and therapeutic strategies that target aberrant biomechanical behavior post-MI.

scholarly journals Association Between Myocardial Strain and Frailty in CHS

2021 ◽  
Author(s):  
Annabel X. Tan ◽  
Sanjiv J. Shah ◽  
Jason L. Sanders ◽  
Bruce M. Psaty ◽  
Chenkai Wu ◽  
...  
Keyword(s):  
Cardiovascular Disease ◽  
Speckle Tracking ◽  
Speckle Tracking Echocardiography ◽  
Myocardial Strain ◽  
Left Ventricular ◽  
Community Dwelling ◽  
Left Ventricular Ejection ◽  
Cross Sectional ◽  
Risk Of Death ◽  
Lower Strain

Background: Myocardial strain, measured by speckle-tracking echocardiography, is a novel measure of subclinical cardiovascular disease and may reflect myocardial aging. We evaluated the association between myocardial strain and frailty—a clinical syndrome of lack of physiological reserve. Methods: Frailty was defined in participants of the CHS (Cardiovascular Health Study) as having ≥3 of the following clinical criteria: weakness, slowness, weight loss, exhaustion, and inactivity. Using speckle-tracking echocardiography data, we examined the cross-sectional (n=3206) and longitudinal (n=1431) associations with frailty among participants who had at least 1 measure of myocardial strain, left ventricular longitudinal strain (LVLS), left ventricular early diastolic strain rate and left atrial reservoir strain, and no history of cardiovascular disease or heart failure at the time of echocardiography. Results: In cross-sectional analyses, lower (worse) LVLS was associated with prevalent frailty; this association was robust to adjustment for left ventricular ejection fraction (adjusted odds ratio, 1.32 [95% CI, 1.07–1.61] per 1-SD lower strain; P =0.007) and left ventricular stroke volume (adjusted OR, 1.32 [95% CI, 1.08–1.61] per 1-SD lower strain; P =0.007). In longitudinal analyses, adjusted associations of LVLS and left ventricular early diastolic strain with incident frailty were 1.35 ([95% CI, 0.96–1.89] P =0.086) and 1.58 ([95% CI, 1.11–2.27] P =0.013, respectively). Participants who were frail and had the worst LVLS had a 2.2-fold increased risk of death (hazard ratio, 2.20 [95% CI, 1.81–2.66]; P <0.0001). Conclusions: In community-dwelling older adults without prevalent cardiovascular disease, worse LVLS by speckle-tracking echocardiography, reflective of subclinical myocardial dysfunction, was associated with frailty. Frailty and LVLS have an additive effect on mortality risk.

Studying of morphology and left ventricular function by conventional and speckle tracking echocardiography in football players

2019 ◽  
pp. 36-40
Author(s):  
Kien Duoc Vang ◽  
Anh Vu Nguyen
Keyword(s):  
Tissue Doppler Imaging ◽  
Speckle Tracking ◽  
Circumferential Strain ◽  
Speckle Tracking Echocardiography ◽  
Early Stage ◽  
Tissue Doppler ◽  
Left Ventricular ◽  
Doppler Imaging ◽  
Control Group ◽  
Cross Sectional

Objective: Recent studies have showed that Tissue Doppler Imaging and Speckle Tracking Echocardiography can discover these changes at functional and structural cardiac in athletes at early stage, especially at the footballers. The purpose of this research was evaluated the structural and functional adaption of left ventricular in footballer by conventional and advanced echocardiography. Materials and methods: We performed a cross-sectional study of 30 footballers who have been trained over 2 years compared to 30 healthy candidate with the same ages. We carried out TM, 2D, STE. Echo machine was Philips Affinity 50CV with QLAB version 10.04 which can analyze online or offline. Result: In comparison with control group, IVSd, LVEDd, PWTd, LVM, LVMI (p = 0.001) was different from athlete group. Left ventricular adaption trended to eccentric hypertrophy and increased left ventricular mass index. A wave was decrease velocity and increased E/A, E/El’, E/E’s ratio. Base circumferential strain, apex circumferential strain, rotation and twist (10.12 ± 1.2) (°) athletes (7.42 ± 2.6) (°) control group with (p = 0.05), were more than control group. Conclusion: Conventional and advanced echocardiography can evaluate structural and functional left ventricular adaption in athletes. Especially, STE provided more data in myocardial deformation, rotation and twist so that it can discover these changes at athlete heart in early stages Key words: Athletes heart, Speckle Tracking Echocardiography, Tissue Doppler Imaging

Sign in / Sign up

Export Citation Format

Share Document