scholarly journals Over all variability of mitral annular plane peak systolic velocity and peak global longitudinal strain rate in relation to age, body size, and sex: The HUNT Study

2020 ◽  
Vol 37 (4) ◽  
pp. 578-585 ◽  
Author(s):  
Asbjørn Støylen ◽  
Harald E. Mølmen ◽  
Håvard Dalen
Keyword(s):  
Body Size ◽  
Strain Rate ◽  
Longitudinal Strain ◽  
Global Longitudinal Strain ◽  
Peak Systolic Velocity ◽  
Hunt Study ◽  
Longitudinal Strain Rate

scholarly journals Segmental and global longitudinal strain and strain rate based on echocardiography of 1266 healthy individuals: the HUNT study in Norway

2009 ◽  
Vol 11 (2) ◽  
pp. 176-183 ◽  
Author(s):  
Havard Dalen ◽  
Anders Thorstensen ◽  
Svein A. Aase ◽  
Charlotte B. Ingul ◽  
Hans Torp ◽  
...  
Keyword(s):  
Strain Rate ◽  
Longitudinal Strain ◽  
Global Longitudinal Strain ◽  
Healthy Individuals ◽  
Strain And Strain Rate ◽  
Hunt Study

scholarly journals Does Nasal Surgery Affect Right Ventricular Myocardial Functions at the Tissue Level in Patients with Nasal Septum Deviation?

2018 ◽  
Vol 7 (8) ◽  
pp. 186 ◽  
Author(s):  
Ziya Simsek ◽  
Eda Simsek
Keyword(s):  
Strain Rate ◽  
Nasal Septum ◽  
Longitudinal Strain ◽  
Chronic Hypoxia ◽  
Global Longitudinal Strain ◽  
Tissue Level ◽  
Nasal Surgery ◽  
Septum Deviation ◽  
Nasal Septum Deviation ◽  
Longitudinal Strain Rate

Objective: One of the most common causes of upper airway obstruction in adults is nasal septum deviation (NSD). The chronic hypoxia caused by this obstruction gradually leads to increased pulmonary vascular resistance, pulmonary hypertension (PHT), and right ventricular (RV) failure. The purpose of this study was to determine changes in RV myocardial functions at the tissue level before, and after surgery in patients with NSD. Subjects and Methods: Fifty-eight patients with symptoms of nasal obstruction and snoring were included in this observational study. Preoperative and postoperative third-month peripheral arterial oxygen saturation (SpO2), and RV systolic and diastolic functions measured by pulmonary artery systolic pressure (PASP), tissue Doppler parameters, and speckle tracking echocardiography (STE) were studied in these patients. Results: We observed a very significant decrease in PASP in the postoperative period (32.54 ± 5.24 mmHg vs. 24.22 ± 4.55 mmHg, p = 0.001). Postoperative SpO2 values, measured at room temperature also increased significantly (93.5 ± 0.82% vs. 95.6 ± 0.79%, p = 0.001). There was a significant improvement after surgery in RV systolic functions, represented by global longitudinal strain (GLS) (21.12 ± 2.07 vs. 22.49 ± 1.89, p = 0.013) and systolic global longitudinal strain rate (GLSRs) (1.30 ± 0.12 vs. 1.38 ± 0.13, p = 0.015). No significant differences in terms of RV diastolic function parameters were detected, including the RV early diastolic global longitudinal strain rate (GLSRe) (1.56 ± 0.21 vs. 1.55 ± 0.26, p = 0.86) and RV late diastolic global longitudinal strain rate (GLSRa) (0.88 ± 0.19; 0.89 ± 0.18, p = 0.76). Conclusion: This study was performed with an advanced technique capable of tissue level examination. The findings demonstrated significant improvement in both chronic hypoxia and RV systolic myocardial functions, measured at the tissue level after nasal surgery.

scholarly journals 1025 Global strain rate do not reduce biological variability compared to S", and do not normalize for body size

2020 ◽  
Vol 21 (Supplement_1) ◽  
Author(s):  
A Stoylen ◽  
H E Molmen ◽  
H E Dalen
Keyword(s):  
Body Size ◽  
Strain Rate ◽  
Longitudinal Strain ◽  
Global Longitudinal Strain ◽  
Tissue Doppler ◽  
Biological Variability ◽  
Systolic Strain ◽  
Global Strain ◽  
Standard Deviations ◽  
Global Strain Rate

Abstract Background As the Left ventricular (LV) apex is stationary, and maximum velocities are in the mitral plane, peak systolic annular velocity (S") normalized for wall length (WL) is a measure of peak systolic strain rate (Fig. 1), as is strain rate measured by tissue Doppler. As the normalization presumably corrects for the size of the heart (and thus body), this should reduce biological variability, but this assumption has previously been shown to be faulty for annular displacement (MAPSE) vs global longitudinal strain. Methods The HUNT study examined 1266 subjects without evidence of heart disease, from a mixed urban / rural population of North Tøndelag county in Norway. Annular systolic velocity was measured by pulsed-wave Tissue Doppler in the septal, lateral, anterior and inferior points, and averaged. Wall lengths was measured in a straight line in the same points, and S" was normalized (S"/WL) and averaged. Segmental systolic strain rate was also measured by combined speckle tracking / Tissue Doppler and averaged to a global value (GLSR). Results are given in table 1. All three measures declined with increasing age (R was -0.23, -0.29 and -0.29, respectively, all p < 0.001) The over-all relative standard deviations were similar for S", normalized S" and global strain rate. Both S"/WL and GLSR correlated negatively with BSA, R was - 0.22 and 0.17, respectively (p < 0.001), while S" showed a modest positive correlation; R = 0.13, (p < 0.001) Conclusion Normalizing peak systolic mitral annular velocity for length do not reduce biological variability, and introduces a systematic error in the body size relation, due to the one-dimensional nature of the normalisation, and the three-dimensional nature of LV deformation. This is in accordance with what has previously been shown for global longitudinal strain vs. annular plane displacement. Table 1 Age (years) S" (cm/s) S"/WL (/s) GLSR (/s) < 40 9.1 (1.2) 0.93 (0.13) 1.08 (0.12) 40 - 60 8.3 (1.3) 0.86 (0.13) 1.03 (0.12) > 60 7.7 (1.3) 0.81 (0.14) 0.98 (0.14) All 8.4 (1.4) 0.87 (0.14) 1.03 (0.13) Relative SD (%) 16.7 16.1 12.6 Mitral annular velocity (S"), normalised velocity (S"/WL) and Global strain by age groups. (Standard deviations in parentheses) Abstract 1025 Figure. Fig. 1

scholarly journals A Method for Direct Estimation of Left Ventricular Global Longitudinal Strain Rate from Echocardiograms

2021 ◽  
Author(s):  
Brett A. Meyers ◽  
Melissa C. Brindise ◽  
Shelby Kutty ◽  
Pavlos P. Vlachos
Keyword(s):  
Strain Rate ◽  
Longitudinal Strain ◽  
Global Longitudinal Strain ◽  
Strain Analysis ◽  
Ground Truth ◽  
Absolute Error ◽  
Left Ventricular ◽  
Ultrasound Images ◽  
Measurement Variability ◽  
Longitudinal Strain Rate

Abstract We present a new method for measuring global longitudinal strain and global longitudinal strain rate from 2D echocardiograms using a logarithmic-transform correlation (LTC) method. Traditional echocardiography strain analysis depends on user inputs and chamber segmentation, which yield increased measurement variability. In contrast, our approach is automated and does not require cardiac chamber segmentation and regularization, thus eliminating these issues. The algorithm was benchmarked against two conventional strain analysis methods using synthetic left ventricle ultrasound images. Measurement error was assessed as a function of contrast-to-noise ratio (CNR) using mean absolute error and root-mean-square error. LTC showed better agreement to the ground truth for strain (𝑹𝟐 = 𝟎. 𝟗1) and strain rate (𝑹𝟐 = 𝟎. 85) as compared to conventional algorithms (strain (𝑹𝟐 = 𝟎. 07), strain rate (𝑹𝟐 = 𝟎. 07)) and was unaffected by CNR. A 200% increase in strain measurement accuracy was observed compared to the conventional algorithms. Subsequently, we tested the method using a 54-subject clinical cohort (20 subjects diseased with cardiomyopathy, 34 healthy controls). Our method distinguished between normal and abnormal left ventricular function with an AUC = 0.85, a 10% improvement over the conventional GLS algorithms.

scholarly journals Early Diastolic Longitudinal Strain Rate at MRI and Outcomes in Heart Failure with Preserved Ejection Fraction

Radiology ◽  
2022 ◽  
Vol 302 (1) ◽  
pp. E5-E5
Author(s):  
Jian He ◽  
Wenjing Yang ◽  
Weichun Wu ◽  
Shuang Li ◽  
Gang Yin ◽  
...  
Keyword(s):  
Heart Failure ◽  
Ejection Fraction ◽  
Strain Rate ◽  
Longitudinal Strain ◽  
Preserved Ejection Fraction ◽  
Longitudinal Strain Rate

Early Diastolic Longitudinal Strain Rate at MRI and Outcomes in Heart Failure with Preserved Ejection Fraction

Radiology ◽  
2021 ◽  
pp. 210188
Author(s):  
Jian He ◽  
Wenjing Yang ◽  
Weichun Wu ◽  
Shuang Li ◽  
Gang Yin ◽  
...  
Keyword(s):  
Heart Failure ◽  
Ejection Fraction ◽  
Strain Rate ◽  
Longitudinal Strain ◽  
Preserved Ejection Fraction ◽  
Longitudinal Strain Rate

Abstract 15755: Adverse Cardiac Remodeling in Obese Children

Circulation ◽  
2015 ◽  
Vol 132 (suppl_3) ◽  
Author(s):  
Aparna Kulkarni ◽  
Jose Miguel Mateo D Lorenzo ◽  
Talin Gulesserian ◽  
Frederick Kaskel ◽  
Joseph Mahgerefteh
Keyword(s):  
Strain Rate ◽  
Cardiac Remodeling ◽  
Longitudinal Strain ◽  
Circumferential Strain ◽  
Global Longitudinal Strain ◽  
Radial Strain ◽  
Volume Ratio ◽  
Obese Children ◽  
Z Scores ◽  
Doppler Indices

Background: Obesity (OB) and hypertension (HTN) are risk factors for early cardiovascular disease (CVD). The aim of this study was to determine the effect of OB and HTN on myocardial mechanics in children using speckle-tracking echocardiography (STE). Methods: Echocardiograms (echo) and ambulatory blood pressure monitors were performed in children referred for HTN from 2009 to 2014. Traditional echo Doppler indices, mass and volume parameters, 24-hr systolic blood pressures (24SBP) and 24-hr diastolic BP indices were obtained. Post-processing was performed on the 2D gray scale images of LV in apical 4-chamber and parasternal short axis mid-papillary views to obtain strain indices (Image Arena, Tomtec). Associations of obesity and BP to the myocardial indices were explored independently using Spearman correlation coefficient. Results: Among 107 patients, 6 - 21 yrs age, 79.4% were males; 42% OB and 53% were hypertensive. Mean Z scores for BMI were 1.5 ± 1.1 and SBP were 1.5 ± 1.2. Mean LV mass (LVM, 2D area-length) was 131 + 42.8 gms, LVMI 2.7 was 40.7 + 9.6 gms, LVM/volume ratio was 0.94 + 0.17. Mean mitral septal E/e’ was 8.3 + 2.1, lateral E/e’ was 5.9 + 1.5 and mitral E/A ratio was 1.8 + 0.4. The mean global longitudinal strain (GLS) was – 17.7 + 3.6, global circumferential strain (GCS) was -20.4 + 3.8, average radial strain (ARS) was 22 + 11.9, average longitudinal strain rate (ALSR) was -1.0 + 0.35 and average circumferential strain rate (ACSR) was -1.5 + 0.5 for all patients. BMI Z scores positively correlated with LVM (r=0.38, p<0.01), LVM/vol (r=0.32, p<0.01), mitral E/e’ (r=0.28, p<0.01), LVMI 2.7 (r=0.5, <0.01). Increased BMI negatively correlated to GLS, GCS and ACSR (r=0.3, p<0.01). Higher SBP, diastolic and mean BP were associated with higher mitral medial E/e’ (r=0.3, p<0.01), however did not have statistically significant correlations to strain indices. Conclusions: Obesity causes adverse cardiac remodeling in obese children. This may provide insights into mechanisms of long-term CV effects of obesity. Myocardial effects of HTN were not apparent, possibly due to heterogeneity of the study group and low power.

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