Computer evaluation of left ventricular wall motion by means of shape-based tracking and symbolic description

Baroni, M.

doi:10.1016/s1350-4533(99)00033-8

Cited by 5 publications

(1 citation statement)

References 22 publications

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“…Much of the previous work, however, has been of a qualitative nature or based on assumptions regarding ideal geometry of the ventricle. Furthermore, many earlier studies are based on 2-D models of short and/or long axis from ventriculography (4,20,30,31,33), MRI (3), and echocardiography (29).…”

Section: Discussionmentioning

confidence: 99%

Left ventricular regional wall curvedness and wall stress in patients with ischemic dilated cardiomyopathy

Zhong

Su²,

Yeo³

et al. 2009

American Journal of Physiology-Heart and Circulatory Physiology

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Geometric remodeling of the left ventricle (LV) after myocardial infarction is associated with changes in myocardial wall stress. The objective of this study was to determine the regional curvatures and wall stress based on three-dimensional (3-D) reconstructions of the LV using MRI. Ten patients with ischemic dilated cardiomyopathy (IDCM) and 10 normal subjects underwent MRI scan. The IDCM patients also underwent delayed gadolinium-enhancement imaging to delineate the extent of myocardial infarct. Regional curvedness, local radii of curvature, and wall thickness were calculated. The percent curvedness change between end diastole and end systole was also calculated. In normal heart, a short- and long-axis two-dimensional analysis showed a 41 +/- 11% and 45 +/- 12% increase of the mean of peak systolic wall stress between basal and apical sections, respectively. However, 3-D analysis showed no significant difference in peak systolic wall stress from basal and apical sections (P = 0.298, ANOVA). LV shape differed between IDCM patients and normal subjects in several ways: LV shape was more spherical (sphericity index = 0.62 +/- 0.08 vs. 0.52 +/- 0.06, P < 0.05), curvedness at end diastole (mean for 16 segments = 0.034 +/- 0.0056 vs. 0.040 +/- 0.0071 mm(-1), P < 0.001) and end systole (mean for 16 segments = 0.037 +/- 0.0068 vs. 0.067 +/- 0.020 mm(-1), P < 0.001) was affected by infarction, and peak systolic wall stress was significantly increased at each segment in IDCM patients. The 3-D quantification of regional wall stress by cardiac MRI provides more precise evaluation of cardiac mechanics. Identification of regional curvedness and wall stresses helps delineate the mechanisms of LV remodeling in IDCM and may help guide therapeutic LV restoration.

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Section: Discussionmentioning

confidence: 99%

Left ventricular regional wall curvedness and wall stress in patients with ischemic dilated cardiomyopathy

Zhong

Su²,

Yeo³

et al. 2009

American Journal of Physiology-Heart and Circulatory Physiology

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Three-Dimensional Transesophageal Echocardiography (TEE) and Other Future Directions

et al. 2000

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Left ventricular regional shape dynamics analysis by three-dimensional cardiac magnetic resonance imaging associated with left ventricular function in first-time myocardial infarction patients

Wan

Kng

Yang

et al. 2014

2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society

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Geometric remodelling of the left ventricle (LV) following myocardial infarction reflects on the geometric characteristics directly. This study focuses on a potential index based on curvedness. Nine consecutive normal volunteers and thirty consecutive myocardial infarction patients underwent MRI scan (twenty-seven patients had follow-up scan). Short-axis cine images of all cases were delineated. Three dimensional LV models were reconstructed and restored for possible motion distortion. The curvedness values were computed over 16-segments nomenclature. The curvedness signal for each segment over twenty-two time frames were fitted using a second order Fourier Series. Fourier coefficients were extracted and unsupervised learning was conducted between normal and patient data. An accuracy of 89% and adjusted Rand Index of 0.5374 suggest that these Fourier Series and curvedness based features can be an useful index for prognosis and diagnosis in clinical practice.

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Computer evaluation of left ventricular wall motion by means of shape-based tracking and symbolic description

Cited by 5 publications

References 22 publications

Left ventricular regional wall curvedness and wall stress in patients with ischemic dilated cardiomyopathy

Left ventricular regional wall curvedness and wall stress in patients with ischemic dilated cardiomyopathy

Three-Dimensional Transesophageal Echocardiography (TEE) and Other Future Directions

Left ventricular regional shape dynamics analysis by three-dimensional cardiac magnetic resonance imaging associated with left ventricular function in first-time myocardial infarction patients

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