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Strain Imaging (strain + imaging)

Distribution by Scientific Domains
Medical Sciences100%

Selected Abstracts

Two-dimensional, Non-Doppler Strain Imaging during Anesthesia and Cardiac Surgery

ECHOCARDIOGRAPHY, Issue 3 2009
F.A.S.E., Nikolaos J. Skubas M.D.
Transesophageal echochardiography (TEE) has become an essential intraoperative monitor during general anesthesia for cardiac surgical procedures. In clinical practice, ventricular function is visually evaluated using gray scale and Doppler modes, despite the fact that subjective interpretation is influenced by level of experience and training. Echocardiographic strain imaging measures cardiac deformation and provides objective quantification of regional myocardial function. Non-Doppler strain, which is derived by tracking speckles from two-dimensional (2D) images, bypasses the limitations of Doppler-based strain measurements and evaluates the complex myocardial deformation along three dimensions. As a result, longitudinal shortening, circumferential thinning and radial thickening can be quantified using standard midesophageal and transgastric views, being acquired during a comprehensive TEE examination. Once non-Doppler strain becomes available on "real time," it will have the potential to become a valuable tool for detection of ischemia on the regional level and objective quantification of global ventricular function. [source]

A Novel Approach to Assess Aortic Stiffness Related to Changes in Aging Using a Two-Dimensional Strain Imaging

ECHOCARDIOGRAPHY, Issue 9 2008
Yoshifumi Oishi M.D.
Background: Recently, it has been demonstrated that aortic stiffness is associated with cardiovascular morbidity and mortality. The objective of the present study was to accurately evaluate the aortic stiffness relative to the changes in aging using two-dimensional (2D) strain imaging in 39 comparatively normal patients (15,85 years). Methods: We obtained short-axis images of the abdominal aorta (Ao) and determined the peak circumferential strain (Ao-S) and strain rate (Ao-SR) and the time from Q-wave of electrocardiogram to peak Ao-S using the 2D strain imaging. The stiffness parameters ,1 and ,2 of the abdominal aorta were measured using M-mode ultrasonography and 2D strain imaging, respectively. Results: The stiffness parameters ,1 and ,2 correlated significantly with age (r=0.51, P < 0.001 and r=0.69, P < 0.0001, respectively), particularly the latter parameter ,2. The peak circumferential Ao-S and Ao-SR correlated strongly with age (r=,0.79, P < 0.0001 and r=,0.87, P < 0.0001, respectively). The stiffness parameter ,1 was significantly greater in the old-aged group (>60 years) than in the young-aged group (<30 years). The peak circumferential Ao-S and Ao-SR were significantly lower in the middle-aged (30,60 years) and old-aged groups than in the young-aged group. Conclusion: The aortic circumferential strain and strain rate measured by 2D strain imaging allow simple and accurate determination of the aortic stiffness. [source]

Detection of Subclinical Cardiac Involvement in Systemic Sclerosis by Echocardiographic Strain Imaging

ECHOCARDIOGRAPHY, Issue 2 2008
Alper Kepez M.D.
Background: Cardiac involvement is one of the major problems in systemic sclerosis (SSc). Subclinical cardiac involvement has a higher frequency than thought previously. In this study we investigated whether subclinical cardiac involvement can be detected by using echocardiographic strain imaging in SSc patients without pulmonary hypertension. Methods: Echocardiographic examinations were performed to 27 SSc patients and 26 healthy controls. Left ventricular strain parameters were obtained from apical views and average strain value was calculated from these measurements. Results: There were no significant differences between patients and controls regarding two-dimensional (2D), conventional Doppler and tissue Doppler velocity measurements. Strain was reduced in 6 of 12 segments of the left ventricle (LV) and in 1 of 2 segments of the right ventricle (RV). Strain rate (SR) was reduced in 2 of 12 segments of the LV and 1 of 2 segments of the RV in SSc patients as compared to controls (P < 0.05 for all). These involvements did not match any particular coronary artery distribution. More important differences were detected by average strain and SR values of the LV between patients and controls (19.78 ± 3.00% vs 23.41 ± 2.73%, P < 0.001; 2.01 ± 0.41 vs 2.23 ± 0.27/sec, P = 0.026, respectively). Furthermore, carbon monoxide diffusion capacity (DLCO) in scleroderma patients significantly correlated with LV average strain (r = 0.59; P = 0.001). Conclusion: Evaluation of ventricular function by using echocardiographic strain imaging appears to be useful to detect subclinical cardiac involvement in SSc patients with normal standard echocardiographic and tissue Doppler velocity findings. [source]

Tissue Doppler and Strain Imaging in Dogs with Myxomatous Mitral Valve Disease in Different Stages of Congestive Heart Failure

JOURNAL OF VETERINARY INTERNAL MEDICINE, Issue 6 2009
A. Tidholm
Background: Tissue Doppler imaging (TDI) including strain and strain rate (SR) assess systolic and diastolic myocardial function. Hypothesis: TDI, strain, and SR variables of the left ventricle (LV) and the interventricular septum (IVS) differ significantly between dogs with myxomatous mitral valve disease (MMVD) with and without congestive heart failure (CHF). Animals: Sixty-one dogs with MMVD with and without CHF. Ten healthy control dogs. Methods: Prospective observational study. Results: Radial motion: None of the systolic variables were altered and 3 of the diastolic velocities were significantly increased in dogs with CHF compared with dogs without CHF and control dogs. Longitudinal motion: 2 systolic velocities and 3 diastolic velocities were significantly increased in dogs with CHF compared with dogs without CHF and control dogs. Difference in systolic velocity time-to-peak between LV and IVS was significantly increased in dogs with MMVD with and without CHF compared with control dogs. In total, 11 (23%) of 48 TDI and strain variables differed significantly between groups. Left atrial to aortic ratio was positively correlated to early diastolic velocities, percentage increase in left ventricular internal diameter in systole was positively correlated to systolic and diastolic velocities, and mitral E wave to peak early diastolic velocity in the LV basal segment (E/Em) was positively correlated to radial strain and SR. Conclusions and Clinical Importance: Few TDI and strain variables were changed in dogs with MMVD with and without CHF. Intraventricular dyssynchrony may be an early sign of MMVD or may be an age-related finding. [source]

Reply to Statin Therapy Decreases Myocardial Function as Evaluated via Strain Imaging

CLINICAL CARDIOLOGY, Issue 3 2010
Jack Rubinstein MD
No abstract is available for this article. [source]

Two-dimensional, Non-Doppler Strain Imaging during Anesthesia and Cardiac Surgery

ECHOCARDIOGRAPHY, Issue 3 2009
F.A.S.E., Nikolaos J. Skubas M.D.
Transesophageal echochardiography (TEE) has become an essential intraoperative monitor during general anesthesia for cardiac surgical procedures. In clinical practice, ventricular function is visually evaluated using gray scale and Doppler modes, despite the fact that subjective interpretation is influenced by level of experience and training. Echocardiographic strain imaging measures cardiac deformation and provides objective quantification of regional myocardial function. Non-Doppler strain, which is derived by tracking speckles from two-dimensional (2D) images, bypasses the limitations of Doppler-based strain measurements and evaluates the complex myocardial deformation along three dimensions. As a result, longitudinal shortening, circumferential thinning and radial thickening can be quantified using standard midesophageal and transgastric views, being acquired during a comprehensive TEE examination. Once non-Doppler strain becomes available on "real time," it will have the potential to become a valuable tool for detection of ischemia on the regional level and objective quantification of global ventricular function. [source]

A Novel Approach to Assess Aortic Stiffness Related to Changes in Aging Using a Two-Dimensional Strain Imaging

ECHOCARDIOGRAPHY, Issue 9 2008
Yoshifumi Oishi M.D.
Background: Recently, it has been demonstrated that aortic stiffness is associated with cardiovascular morbidity and mortality. The objective of the present study was to accurately evaluate the aortic stiffness relative to the changes in aging using two-dimensional (2D) strain imaging in 39 comparatively normal patients (15,85 years). Methods: We obtained short-axis images of the abdominal aorta (Ao) and determined the peak circumferential strain (Ao-S) and strain rate (Ao-SR) and the time from Q-wave of electrocardiogram to peak Ao-S using the 2D strain imaging. The stiffness parameters ,1 and ,2 of the abdominal aorta were measured using M-mode ultrasonography and 2D strain imaging, respectively. Results: The stiffness parameters ,1 and ,2 correlated significantly with age (r=0.51, P < 0.001 and r=0.69, P < 0.0001, respectively), particularly the latter parameter ,2. The peak circumferential Ao-S and Ao-SR correlated strongly with age (r=,0.79, P < 0.0001 and r=,0.87, P < 0.0001, respectively). The stiffness parameter ,1 was significantly greater in the old-aged group (>60 years) than in the young-aged group (<30 years). The peak circumferential Ao-S and Ao-SR were significantly lower in the middle-aged (30,60 years) and old-aged groups than in the young-aged group. Conclusion: The aortic circumferential strain and strain rate measured by 2D strain imaging allow simple and accurate determination of the aortic stiffness. [source]

Detection of Subclinical Cardiac Involvement in Systemic Sclerosis by Echocardiographic Strain Imaging

ECHOCARDIOGRAPHY, Issue 2 2008
Alper Kepez M.D.
Background: Cardiac involvement is one of the major problems in systemic sclerosis (SSc). Subclinical cardiac involvement has a higher frequency than thought previously. In this study we investigated whether subclinical cardiac involvement can be detected by using echocardiographic strain imaging in SSc patients without pulmonary hypertension. Methods: Echocardiographic examinations were performed to 27 SSc patients and 26 healthy controls. Left ventricular strain parameters were obtained from apical views and average strain value was calculated from these measurements. Results: There were no significant differences between patients and controls regarding two-dimensional (2D), conventional Doppler and tissue Doppler velocity measurements. Strain was reduced in 6 of 12 segments of the left ventricle (LV) and in 1 of 2 segments of the right ventricle (RV). Strain rate (SR) was reduced in 2 of 12 segments of the LV and 1 of 2 segments of the RV in SSc patients as compared to controls (P < 0.05 for all). These involvements did not match any particular coronary artery distribution. More important differences were detected by average strain and SR values of the LV between patients and controls (19.78 ± 3.00% vs 23.41 ± 2.73%, P < 0.001; 2.01 ± 0.41 vs 2.23 ± 0.27/sec, P = 0.026, respectively). Furthermore, carbon monoxide diffusion capacity (DLCO) in scleroderma patients significantly correlated with LV average strain (r = 0.59; P = 0.001). Conclusion: Evaluation of ventricular function by using echocardiographic strain imaging appears to be useful to detect subclinical cardiac involvement in SSc patients with normal standard echocardiographic and tissue Doppler velocity findings. [source]