Quantitative evaluation of left ventricular regional wall motion using a real-time wall thickness curve system with two-dimensional echocardiography

Mizushige, Katsufumi; Furumoto, Wataru; Hirao, Kenichi; Iwado, Yasuyoshi; Ohmori, Koji; Matsuo, Hirohíde

doi:10.1016/s0002-9149(99)00535-4

Cited by 4 publications

(3 citation statements)

References 17 publications

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“…Moreover a radiation issue may limit the application of SPECT. A computerized %WT measurement in 2-D echo based on an integrated back-scatter system had also been introduced [11]. However, that system could only analyze a single segment at a time.…”

Section: Discussionmentioning

confidence: 99%

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Automatic Quantification of Left Ventricular Systolic Wall Thickening Using Two-Dimensional Strain Assessed by a Novel Tissue-Tracking System

et al. 2005

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Background. A novel tissue-tracking system (TTS) that enables automatic assessment of two-dimensional (2-D) strain of left ventricle (LV) segments simultaneously from gray-scale digital echocardiography images has been validated in an animal study at our institution. We sought to define the application of TTS for automatic quantification of systolic wall thickening (WT) with a study in humans. Methods.We assessed 202 LV segments from 101 good and fair quality digital echo images acquired from 35 subjects. Radial strain was automatically derived from displacement between two points of interest placed at the epi-and endocardial borders of each segment. Peak radial strain at each segment was compared with manually measured systolic wall thickening.Results. There were good correlation and agreement between 2-D radial strain assessed by TTS and manually measured systolic WT in overall subjects (r = 0.89, p < 0.001). The correlation and agreements were better in good quality images (r = 0.94, p < 0.001) rather than that in fair quality images (r = 0.82, p < 0.001). Conclusion.The novel TTS provides a method for automatic quantification of human LV systolic wall thickening. (J Echocardiogr 2005; 3: 27-32)

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Section: Discussionmentioning

confidence: 99%

“…Maximum wall thickness at systole and minimum thickness at diastole were measured using measurement tools of the echo machine. The %WT was calculated as: (maximum thickness -minimum thickness) X 100% / minimum thickness [4,10,11]. Correlation and agreement analysis.…”

Section: Images Acquisitionmentioning

confidence: 99%

Automatic Quantification of Left Ventricular Systolic Wall Thickening Using Two-Dimensional Strain Assessed by a Novel Tissue-Tracking System

et al. 2005

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“…[20][21][22] Accordingly, analysis of regional systolic wall thickening in consideration of the regional radial wall stress holds a key to determining the mechanism of the abovementioned paradox. [23][24][25] Cine magnetic resonance (MR) imaging can provide high temporal and spatial resolution sufficient to analyze systolic wall thickening and sequential radial wall stress during systole at the common regions on LV shortaxis images.…”

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confidence: 99%

Focalized Contractile Impairment at Hypertrophied Myocardium Proven in Consideration of Wall Stress in Patients With Hypertrophic Cardiomyopathy

et al. 2006

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SUMMARYIn hypertrophic cardiomyopathy (HCM) a hyperkinetic state is sometimes observed in spite of impaired systolic function in the hypertrophied myocardium. The aim of the present study was to determine the mechanism of this paradox.Seventeen patients with HCM and 10 normal subjects underwent cine magnetic resonance (MR) imaging to measure percent systolic wall thickening and percent fractional shortening. The ratio of systolic radial wall stress of the LV at the hypertrophied myocardium over that at the nonhypertrophied myocardium was evaluated to describe the focal advantageous condition for wall thickening.The ratio was 0.66 ± 0.36 at the start of contraction and 0.78 ± 0.31 at early-systole, indicating consistently smaller radial wall stress at the hypertrophied myocardium. Although the condition for contraction was favorable (a ratio less than 1.00), percent systolic wall thickening at the hypertrophied myocardium (23.0 ± 11.8%) was smaller than that at the nonhypertrophied myocardium (70.5 ± 32.3%). Smaller end-diastolic dimension (HCM group; 45.2 ± 4.2 mm, reference group; 48.9 ± 4.1 mm, P = 0.04) with a statistically identical value of systolic decrease in intraventricular dimension (HCM group; 19.7 ± 3.9 mm, reference group; 18.9 ± 3.2 mm, P = 0.60) yielded high percent fractional shortening in patients with HCM (43.5 ± 7.6%).Although contractile impairment was proven at the hypertrophied region with low radial wall stress in the HCM group, the smaller end-diastolic dimension in this group resulted in high percent fractional shortening. (Int Heart J 2006; 47: 247-258)

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Usefulness of Automated Quantitation of Regional Left Ventricular Wall Motion by a Novel Method of Two-Dimensional Echocardiographic Tracking

Ogawa¹,

Hozumi²,

Sugioka³

et al. 2006

The American Journal of Cardiology

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Quantitative evaluation of left ventricular regional wall motion using a real-time wall thickness curve system with two-dimensional echocardiography

Cited by 4 publications

References 17 publications

Automatic Quantification of Left Ventricular Systolic Wall Thickening Using Two-Dimensional Strain Assessed by a Novel Tissue-Tracking System

Automatic Quantification of Left Ventricular Systolic Wall Thickening Using Two-Dimensional Strain Assessed by a Novel Tissue-Tracking System

Focalized Contractile Impairment at Hypertrophied Myocardium Proven in Consideration of Wall Stress in Patients With Hypertrophic Cardiomyopathy

Usefulness of Automated Quantitation of Regional Left Ventricular Wall Motion by a Novel Method of Two-Dimensional Echocardiographic Tracking

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