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

Ogawa, Keitaro; Hozumi, Takeshi; Sugioka, Kenichi; Matsumura, Yoshiki; Nishiura, Masahide; Kanda, Ryoichi; Abe, Yasuhiko; Takemoto, Yasuhiko; Yoshiyama, Minoru; Yoshikawa, Junichi

doi:10.1016/j.amjcard.2006.06.060

Cited by 34 publications

(31 citation statements)

References 16 publications

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“…In this system's algorithm, differences in the speckle pattern of a cubic template are matched between sequential frames with minimization by the sum of squared differences. 20 The algorithm makes it possible to set a frame rate for each image of approximately 30 Hz, which is recommended as the minimum frame rate to limit frame-by-frame changes in the speckle pattern. 11 In addition, for 3D-STI, displacement of a target point is tracked as displacement of a volume of interest (cubic template) around the point.…”

Section: Discussionmentioning

confidence: 99%

“…In the template matching process, the template volume in the current frame is generated from an approximately 10ϫ10ϫ10-mm cube in which the motion estimation point is centered (Figure 2). 20 The most similar point in the next volume is searched for by comparing a template volume with the cube in the next volume. We used the 3D sum of squared differences method to test image similarity.…”

Section: Wall Motion Tracking Methodsmentioning

confidence: 99%

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Validation of 3-Dimensional Speckle Tracking Imaging to Quantify Regional Myocardial Deformation

Seo

Ishizu

Enomoto

et al. 2009

Circ: Cardiovascular Imaging

188

144

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Background-Three-dimensional speckle tracking imaging (3D-STI) has been introduced to assess regional left ventricular (LV) myocardial function. This study was designed to validate LV strain measurements by 3D-STI against data obtained by sonomicrometry. Methods and Results-In each of 10 anesthetized sheep, sonomicrometry crystals were implanted on the endocardium and epicardium at the LV basal, mid, and apical anterior and lateral walls. LV 3D-STI data sets were obtained from the apical approach at a frame rate of approximately 30 frames/s. Segmental longitudinal (LS), radial (RS), and circumferential strain (CS) measurements by 3D-STI were compared with those by sonomicrometry at baseline and during pharmacological stress tests (dobutamine and propranolol infusion) and acute myocardial ischemia induced by coronary artery occlusion.

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Section: Discussionmentioning

confidence: 99%

Section: Wall Motion Tracking Methodsmentioning

confidence: 99%

Validation of 3-Dimensional Speckle Tracking Imaging to Quantify Regional Myocardial Deformation

Seo

Ishizu

Enomoto

et al. 2009

Circ: Cardiovascular Imaging

188

144

View full text Add to dashboard Cite

show abstract

“…LA volume was calculated by using the biplane modified Simpson method (18). LA strain was calculated by using an automated frame-to-frame pixel pattern-matching technique (19). LA strain and strain rate were calculated from the average of the global values in the longitudinal direction (perpendicular to the mitral valve plane) obtained from two-and four-chamber views.…”

Section: Lge Analysis and T1 Mappingmentioning

confidence: 99%

Multi-Ethnic Study of Atherosclerosis: Association between Left Atrial Function Using Tissue Tracking from Cine MR Imaging and Myocardial Fibrosis

Imai¹,

Ambale-Venkatesh²,

Samiei³

et al. 2014

Radiology

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).q RSNA, 2014 Purpose:To investigate the association between left atrial (LA) function and left ventricular myocardial fibrosis using cardiac magnetic resonance (MR) imaging in a multi-ethnic population. Materials and Methods:For this HIPAA-compliant study, the institutional review board at each participating center approved the study protocol, and all participants provided informed consent. Of 2839 participants who had undergone cardiac MR in 2010-2012, 143 participants with myocardial scar determined with late gadolinium enhancement and 286 age-, sex-, and ethnicity-matched control participants were identified. LA volume, strain, and strain rate were analyzed by using multimodality tissue tracking from cine MR imaging. T1 mapping was applied to assess diffuse myocardial fibrosis. The association between LA parameters and myocardial fibrosis was evaluated with the Student t test and multivariable regression analysis. Results:The scar group had significantly higher minimum LA volume than the control group (mean, 22.0 6 10.5 [standard deviation] vs 19.0 6 7.8, P = .002) and lower LA ejection fraction (45.9 6 10.7 vs 51.3 6 8.7, P , .001), maximal LA strain (S max ) (25.4 6 10.7 vs 30.6 6 10.6, P , .001) and maximum LA strain rate (SR max ) (1.08 6 0.45 vs 1.29 6 0.51, P , .001), and lower absolute LA strain rate at early diastolic peak (SR E ) (20.77 6 0.42 vs 21.01 6 0.48, P , .001) and LA strain rate at atrial contraction peak (SR A ) (21.50 6 0.62 vs 21.78 6 0.69, P , .001) than the control group. T1 time 12 minutes after contrast material injection was significantly associated with S max (b coefficient = 0.043, P = .013), SR max (b coefficient = 0.0025, P = .001), SR E (b coefficient = 20.0016, P = .027), and SR A (b coefficient 20.0028, P = .01) in the regression model. T1 time 25 minutes after contrast material injection was significantly associated with SR max (b coefficient = 0.0019, P = .016) and SR A (b coefficient = 20.0022, P = .034). Conclusion:Reduced LA regional and global function are related to both replacement and diffuse myocardial fibrosis processes.Clinical trial registration no. NCT00005487q RSNA, 2014

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“…The 2D-STI software uses the sum of squared differences method to find the most similar speckle pattern in subsequent frames. 20 We measured peak and end-systolic radial and circumferential strain (CS) (Figure 1). Radial strain (RS) was defined as the percentage change in wall thickness in the direction perpendicular to the endocardium and away from the LV lumen, and CS was defined as the percentage change in regional length in the circumferential direction.…”

Section: Echocardiographymentioning

confidence: 99%

Impaired Subendocardial Wall Thickening and Post-Systolic Shortening Are Signs of Critical Myocardial Ischemia in Patients With Flow-Limiting Coronary Stenosis

Ishizu

Seo

Baba

et al. 2011

Circ J

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

Cited by 34 publications

References 16 publications

Validation of 3-Dimensional Speckle Tracking Imaging to Quantify Regional Myocardial Deformation

Validation of 3-Dimensional Speckle Tracking Imaging to Quantify Regional Myocardial Deformation

Multi-Ethnic Study of Atherosclerosis: Association between Left Atrial Function Using Tissue Tracking from Cine MR Imaging and Myocardial Fibrosis

Impaired Subendocardial Wall Thickening and Post-Systolic Shortening Are Signs of Critical Myocardial Ischemia in Patients With Flow-Limiting Coronary Stenosis

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