The Experts below are selected from a list of 276 Experts worldwide ranked by ideXlab platform
Genjiro Kimura - One of the best experts on this subject based on the ideXlab platform.
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myocardial radial strain in early Diastole is useful for assessing left ventricular early diastolic function comparison with invasive parameters
Journal of The American Society of Echocardiography, 2008Co-Authors: Kazuaki Wakami, Nobuyuki Ohte, Seiichiro Sakata, Genjiro KimuraAbstract:BACKGROUND: Peak myocardial systolic strain determined using myocardial strain imaging is a useful index of left ventricular (LV) myocardial systolic function. We investigated the relationship between peak myocardial radial strain during early Diastole and LV early diastolic function. METHODS: A total of 85 patients without localized LV wall-motion abnormality underwent myocardial strain imaging and diagnostic cardiac catheterization. Peak myocardial radial strain during early Diastole was obtained at the LV posterior-sided wall in the short-axis image. Invasive parameters of LV function were determined during cardiac catheterization. RESULTS: Peak myocardial radial strain during early Diastole significantly correlated with both the time constant tau (r = 0.80, P < .0001) and the peak negative dP/dt (r = -0.64, P < .0001). Although it correlated with the LV ejection fraction, LV end-diastolic pressure, LV end-systolic volume index, and mean pulmonary capillary wedge pressure, the time constant tau was the prime determinant of peak myocardial radial strain during early Diastole. CONCLUSION: Peak myocardial radial strain during early Diastole could be used to evaluate LV early diastolic function. Myocardial strain imaging is a promising noninvasive tool for assessing LV function in systole and early Diastole.
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Myocardial Radial Strain in Early Diastole is Useful for Assessing Left Ventricular Early Diastolic Function: Comparison with Invasive Parameters
Journal of The American Society of Echocardiography, 2007Co-Authors: Kazuaki Wakami, Nobuyuki Ohte, Seiichiro Sakata, Genjiro KimuraAbstract:Background Peak myocardial systolic strain determined using myocardial strain imaging is a useful index of left ventricular (LV) myocardial systolic function. We investigated the relationship between peak myocardial radial strain during early Diastole and LV early diastolic function. Methods A total of 85 patients without localized LV wall-motion abnormality underwent myocardial strain imaging and diagnostic cardiac catheterization. Peak myocardial radial strain during early Diastole was obtained at the LV posterior-sided wall in the short-axis image. Invasive parameters of LV function were determined during cardiac catheterization. Results Peak myocardial radial strain during early Diastole significantly correlated with both the time constant τ ( r = 0.80, P r = −0.64, P Conclusion Peak myocardial radial strain during early Diastole could be used to evaluate LV early diastolic function. Myocardial strain imaging is a promising noninvasive tool for assessing LV function in systole and early Diastole.
John E Sanderson - One of the best experts on this subject based on the ideXlab platform.
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peak early diastolic mitral annulus velocity by tissue doppler imaging adds independent and incremental prognostic value
Journal of the American College of Cardiology, 2003Co-Authors: Mei Wang, Angela Yeemoon Wang, Pik Yuk Ho, Yan Zhang, John E SandersonAbstract:Abstract Objectives The aim of this study was to ascertain if left ventricular mitral annulus velocities measured by tissue Doppler imaging (TDI) are more powerful predictors of outcome compared with clinical data and standard Doppler-echocardiographic parameters. Background Tissue Doppler imaging of basal or mitral annulus velocities provides rapid assessment of ventricular long axis function. But it is not known if TDI-derived velocities in systole and Diastole add incremental value and are superior to the standard Doppler-echocardiographic measurements as a predictor of outcome. Methods The study population consisted of 518 subjects, 353 with cardiac disease and 165 normal subjects who had full Doppler two-dimensional–echocardiographic studies with measurement of mitral inflow velocities in early and late Diastole, E-wave deceleration time (DT), peak systolic mitral annular velocity (Sm) early and late diastolic mitral annular velocity (Em and Am) by TDI, early diastolic flow propagation velocity, and standard chamber dimensions. All subjects were followed up for two years. The end point was cardiac death. Results Tissue Doppler imaging mitral annulus systolic and diastolic velocities were all significantly lower in the non-survivors (all p Conclusions Mitral annulus velocity measured by TDI in early Diastole gives incremental predictive power for cardiac mortality compared to clinical data and standard echocardiographic measurements. This easily available measurement adds significant value in the clinical management of cardiac patients.
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left ventricular long axis changes in early Diastole and systole impact of systolic function on Diastole
Clinical Science, 2002Co-Authors: Yan Zhang, Pik Yuk Ho, Mei Wang, L A Brodin, John E SandersonAbstract:Impaired long-axis motion is a sensitive marker of systolic myocardial dysfunction, but no data are available that relate long-axis changes in systole with those in Diastole, particularly in subjec ...
Jim M Wild - One of the best experts on this subject based on the ideXlab platform.
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right ventricular mass has better reproducibility in systole than Diastole in patients with suspected pulmonary hypertension
Journal of Cardiovascular Magnetic Resonance, 2015Co-Authors: Andrew J Swift, Dave Capener, David G Kiely, Jim M WildAbstract:Results 30 consecutive patients with suspected pulmonary hypertension were studied by both independent observers. RV mass measured in systole had higher ICC agreement than Diastole (0.983 verses 0.947) and showed less bias at Bland-Altman analysis, 1.9g compared to 8.7g, Figure 1. Of note, RV mass measurements were significantly higher when measured in systole than Diastole, with a mean difference of 10g (95% confidence interval of 6.6 to 13.2, p<0.0001). Bland Altman analysis shows RV mass measured in systole to be systematically higher than in Diastole with a bias of 9.9g, with limits of agreement ranging from -27.4g to 7.6g. Figure 2 illustrates that the RV endocardial border is more easily appreciated in systole compared to Diastole in patients with and without pulmonary hypertension. Conclusions RV mass possess a higher reproducibility profile at endsystole than end-Diastole in patients with suspected pulmonary hypertension, this finding is of clinical relevance as mass measurements are typically measured in Diastole.
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Right ventricular mass has better reproducibility in systole than Diastole in patients with suspected pulmonary hypertension
Journal of Cardiovascular Magnetic Resonance, 2015Co-Authors: Andrew J Swift, Dave Capener, David G Kiely, Jim M WildAbstract:Results 30 consecutive patients with suspected pulmonary hypertension were studied by both independent observers. RV mass measured in systole had higher ICC agreement than Diastole (0.983 verses 0.947) and showed less bias at Bland-Altman analysis, 1.9g compared to 8.7g, Figure 1. Of note, RV mass measurements were significantly higher when measured in systole than Diastole, with a mean difference of 10g (95% confidence interval of 6.6 to 13.2, p
Kazuaki Wakami - One of the best experts on this subject based on the ideXlab platform.
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myocardial radial strain in early Diastole is useful for assessing left ventricular early diastolic function comparison with invasive parameters
Journal of The American Society of Echocardiography, 2008Co-Authors: Kazuaki Wakami, Nobuyuki Ohte, Seiichiro Sakata, Genjiro KimuraAbstract:BACKGROUND: Peak myocardial systolic strain determined using myocardial strain imaging is a useful index of left ventricular (LV) myocardial systolic function. We investigated the relationship between peak myocardial radial strain during early Diastole and LV early diastolic function. METHODS: A total of 85 patients without localized LV wall-motion abnormality underwent myocardial strain imaging and diagnostic cardiac catheterization. Peak myocardial radial strain during early Diastole was obtained at the LV posterior-sided wall in the short-axis image. Invasive parameters of LV function were determined during cardiac catheterization. RESULTS: Peak myocardial radial strain during early Diastole significantly correlated with both the time constant tau (r = 0.80, P < .0001) and the peak negative dP/dt (r = -0.64, P < .0001). Although it correlated with the LV ejection fraction, LV end-diastolic pressure, LV end-systolic volume index, and mean pulmonary capillary wedge pressure, the time constant tau was the prime determinant of peak myocardial radial strain during early Diastole. CONCLUSION: Peak myocardial radial strain during early Diastole could be used to evaluate LV early diastolic function. Myocardial strain imaging is a promising noninvasive tool for assessing LV function in systole and early Diastole.
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Myocardial Radial Strain in Early Diastole is Useful for Assessing Left Ventricular Early Diastolic Function: Comparison with Invasive Parameters
Journal of The American Society of Echocardiography, 2007Co-Authors: Kazuaki Wakami, Nobuyuki Ohte, Seiichiro Sakata, Genjiro KimuraAbstract:Background Peak myocardial systolic strain determined using myocardial strain imaging is a useful index of left ventricular (LV) myocardial systolic function. We investigated the relationship between peak myocardial radial strain during early Diastole and LV early diastolic function. Methods A total of 85 patients without localized LV wall-motion abnormality underwent myocardial strain imaging and diagnostic cardiac catheterization. Peak myocardial radial strain during early Diastole was obtained at the LV posterior-sided wall in the short-axis image. Invasive parameters of LV function were determined during cardiac catheterization. Results Peak myocardial radial strain during early Diastole significantly correlated with both the time constant τ ( r = 0.80, P r = −0.64, P Conclusion Peak myocardial radial strain during early Diastole could be used to evaluate LV early diastolic function. Myocardial strain imaging is a promising noninvasive tool for assessing LV function in systole and early Diastole.
Thomas H Marwick - One of the best experts on this subject based on the ideXlab platform.
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the deconvolution of Diastole
Journal of the American College of Cardiology, 2009Co-Authors: Thomas H MarwickAbstract:Heart failure with normal ejection fraction (HFNEF) is a common presentation in elderly persons and seems to have a prognosis almost as bleak as systolic heart failure. Much work on the pathophysiology of this entity has focused on left ventricular (LV) stiffness ([1][1])—indeed, stiffening is
