Assessment of Left Ventricular Rotation and Torsion with Two-dimensional Speckle Tracking Echocardiography

Kim, Yong Jin; Sohn, Dae‐Won; Lee, Sang-Eun; Choi, Sung Woong; Park, Jin-Shik; Kim, Yong-Jin; Oh, Byung‐Hee; Park, Young-Bae; Choi, Yun-Shik

doi:10.1016/j.echo.2006.07.007

Cited by 177 publications

(176 citation statements)

References 21 publications

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“…It has been suggested that the basal rotation gradually increases with age and is affected by age-related changes in diastolic filling. 27 Although we cannot demonstrate a clear mechanism, myocardial stiffness may involve changes in basal rotation in patients with hypertension.…”

Section: Discussionmentioning

confidence: 71%

Longitudinal Strain and Torsion Assessed by Two-Dimensional Speckle Tracking Correlate with the Serum Level of Tissue Inhibitor of Matrix Metalloproteinase-1, a Marker of Myocardial Fibrosis, in Patients with Hypertension

Kang

Lim

Choi

et al. 2008

Journal of the American Society of Echocardiography

172

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Section: Discussionmentioning

confidence: 71%

Longitudinal Strain and Torsion Assessed by Two-Dimensional Speckle Tracking Correlate with the Serum Level of Tissue Inhibitor of Matrix Metalloproteinase-1, a Marker of Myocardial Fibrosis, in Patients with Hypertension

Kang

Lim

Choi

et al. 2008

Journal of the American Society of Echocardiography

172

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“…[14][15][16] It has been shown that delayed and reduced diastolic untwisting during the diastolic phase may be an early indicator of an LV relaxation abnormality for hypertensive patients with LV hypertrophy. 17 Bansal et al 5 found that resting global LVrot and regional LVrot were significantly reduced in patients with myocardial infarction compared to those without previous myocardial infarction, and LVrot was most impaired in patients with multiple areas of infarction.…”

Section: Left Ventricular Rotation and Clinical Implicationsmentioning

confidence: 99%

“…Moreover, some clinical studies have reported that 2D STI has limited feasibility or wide variability in the values for LVrot. 16,23 Three-Dimensional SPI for Rotation Measurement With the advent of real-time 3D ultrasound in echocardiography, 10,11 3D STI using real-time 3D data sets will certainly become increasingly attractive. 24 Chen et al 10 have shown the feasibility of 3D STI on 3D ultrasonic data sets and that 3D STI was better than 2D SPI for cardiac strain imaging.…”

Section: Left Ventricular Rotation and Clinical Implicationsmentioning

confidence: 99%

Three-Dimensional Speckle-Tracking Imaging for Left Ventricular Rotation Measurement

Zhou

Ashraf

et al. 2010

Journal of Ultrasound in Medicine

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Objective. Left ventricular (LV) twist is manifested in oppositely directed apical and basal rotation. We studied a new 3-dimensional (3D) echocardiography program (wall motion tracking; Toshiba America Medical Systems, Inc, Tustin, CA) for left ventricular rotation. Methods. We used a rotation model with a variable-speed motor to rotate hearts in a water bath. We studied 10 freshly harvested pig hearts, which were mounted on the rotary actuator of our twist phantom with the heart base rotating and the apex held fixed to avoid translational motion, at rotations of 0°, 15°, 20°, and 25°. Full-volume 3D image loops were acquired on a Toshiba Aplio Artida ultrasound system at a maximized frame rate. Results. As the actual heart rotation increased, computed segmental and global rotation also increased accordingly, with the measured rotations of the basal and middle segments greater than that of the apex (both P < .001). Segmental and global rotation at all 3 levels correlated well with the actual rotation (base: r = 0.93; middle: r = 0.92; apex: r = 0.82; global: r = 0.95; all P < .001). Conclusions. The new 3D program tracked LV rotation accurately. Key words: left ventricular rotation; speckle tracking; 3-dimensional imaging. esearch in clinical deformation cardiac mechanics has recently been focused on 2-dimensional (2D) left ventricular (LV) deformation studies, including LV twist and LV rotation (LVrot). 1 Left ventricular twist may be related to the helical fiber orientation of the LV, which results in opposing rotational directions of the apex and the base and which determines the magnitude of this torsional deformation. 2,3 It has been proposed that LV twist is a sensitive marker of changes in both regional and global LV function. [4][5][6] Recently, efforts have focused on 2D speckle-tracking imaging (STI) to assess LVrot. [7][8][9] Several studies have shown that 2D STI gives equivalent results when compared to magnetic resonance imaging (MRI) or Doppler tissue imaging (DTI) for measuring LVrot. 9 However, because of the 3-dimensional (3D) nature of cardiac deformation, 2D STI based on 2D imaging may not be robust enough for LVrot measurement because of speckle decorrelation or the loss of some speckles due to elevational

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“…6 However, conflicting data have been published on the changes in the untwist rate and, in particular, the peak diastolic untwisting velocity with ageing. [7][8][9][10] In order to gain further insight into age-associated changes of LV diastolic function, the purpose of the current study was to investigate alterations in LV untwisting with ageing. …”

mentioning

confidence: 99%

Alterations in Left Ventricular Untwisting With Ageing

Dalen

Soliman

Kauer

et al. 2010

Circ J

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Circulation Journal Official Journal of the Japanese Circulation Society http://www. j-circ.or.jp nderstanding age-associated changes of the cardiovascular system is important because these changes are an important precursor to cardiovascular disease. 1 Marked changes in left ventricular (LV) diastolic function are known to occur in normal, healthy, older people, 2,3 although the processes contributing to these changes are yet to be fully elucidated. The dynamic interaction of subendocardial and subepicardial fibers causes a twisting LV deformation during systole that leads to storage of potential energy. 4,5 Subsequent rapid untwisting during isovolumic relaxation decreases LV pressure, which makes effective sucking of blood into the LV possible once the mitral valve opens. 6 However, conflicting data have been published on the changes in the untwist rate and, in particular, the peak diastolic untwisting velocity with ageing. [7][8][9][10] In order to gain further insight into age-associated changes of LV diastolic function, the purpose of the current study was to investigate alterations in LV untwisting with ageing. Methods Study ParticipantsThe study population consisted of 75 healthy, non-obese (body mass index <27 kg/m 2 ) volunteers without hypertension, diabetes or regular use of medication for cardiovascular disease, with a normal 12-lead ECG, normal left atrial and LV dimensions, and LV ejection fraction by transthoracic echocardiography. None of the patients had complaints that were compatible with cardiac disease. All patients were required to have good echocardiographic image quality that allowed for complete analysis of LV rotation and twist by speckle-tracking echocardiography. Patients were primarily recruited from our department (personnel) or were family members or friends. The subjects were classified into 3 groups: aged 16-35 (Group 1, n=25), 36-55 (Group 2, n=25) and 56-75 (Group 3, n=25) years. Informed consent was given by all patients and the institutional review board approved the study. EchocardiographyTwo-dimensional grayscale harmonic images were obtained in the left lateral decubitus position using a commercially available ultrasound system (iE33, Philips, Best, The Netherlands) equipped with a broadband (1-5 MHz) S5-1 transducer (frequency transmitted 1.7 MHz, received 3.4 MHz). All echocardiographic measurements were averaged from 3 heartbeats. From the M-mode recordings the following data were acquired: left atrial size, LV end-diastolic septal and posterior wall thicknesses, and LV end-diastolic and end-systolic dimensions. The LV ejection fraction was calculated from Background: In order to gain further insight into age-associated changes of left ventricular (LV) diastolic function, the purpose of the current study was to investigate alterations in LV untwisting with ageing.

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Assessment of Left Ventricular Rotation and Torsion with Two-dimensional Speckle Tracking Echocardiography

Cited by 177 publications

References 21 publications

Longitudinal Strain and Torsion Assessed by Two-Dimensional Speckle Tracking Correlate with the Serum Level of Tissue Inhibitor of Matrix Metalloproteinase-1, a Marker of Myocardial Fibrosis, in Patients with Hypertension

Longitudinal Strain and Torsion Assessed by Two-Dimensional Speckle Tracking Correlate with the Serum Level of Tissue Inhibitor of Matrix Metalloproteinase-1, a Marker of Myocardial Fibrosis, in Patients with Hypertension

Three-Dimensional Speckle-Tracking Imaging for Left Ventricular Rotation Measurement

Alterations in Left Ventricular Untwisting With Ageing

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