Radial deformation by tissue Doppler imaging in multiple myocardial layers

Davidsen, Einar Skulstad; Moen, Christian Arvei; Matre, Knut

doi:10.1080/14017430903177708

Cited by 6 publications

(13 citation statements)

References 22 publications

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“…Clark and colleagues were the first to report the endocardial-to-epicardial Ecc gradient using tagging with 1.5-T MRI in 10 healthy hearts24. Similar findings were confirmed by STE, tissue Doppler imaging (TDI), phase-contrast magnetic resonance (PC-MR), and strain-encoded (SENC) CMR121325. Most studies carried out transmural analyses by dividing the myocardial wall into two layers (endocardial and epicardial)10262728.…”

Section: Discussionmentioning

confidence: 86%

“…Other than the well-known importance of global strain, layer-specific strain and distribution patterns of regional strain have not been investigated. Analyses of multiple-layer strain by echocardiography have been developed, and a transmural strain gradient demonstrated121314. However, layer-specific analyses of myocardial strain by FT-CMR have not been studied.…”

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confidence: 99%

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Distribution pattern of left-ventricular myocardial strain analyzed by a cine MRI based deformation registration algorithm in healthy Chinese volunteers

Liu

Yang

Wan

et al. 2017

Sci Rep

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The cine magnetic resonance imaging based technique feature tracking-cardiac magnetic resonance (FT-CMR) is emerging as a novel, simple and robust method to evaluate myocardial strain. We investigated the distribution characteristics of left-ventricular myocardial strain using a novel cine MRI based deformation registration algorithm (DRA) in a cohort of healthy Chinese subjects. A total of 130 healthy Chinese subjects were enrolled. Three components of orthogonal strain (radial, circumferential, longitudinal) of the left ventricle were analyzed using DRA on steady-state free precession cine sequence images. A distinct transmural circumferential strain gradient was observed in the left ventricle that showed universal increment from the epicardial to endocardial myocardial wall (epiwall: −15.4 ± 1.9%; midwall: −18.8 ± 2.0%; endowall: −22.3 ± 2.3%, P < 0.001). Longitudinal strain showed a similar trend from epicardial to endocardial layers (epiwall: −16.0 ± 2.9%; midwall: −15.6 ± 2.7%; endowall: −14.8 ± 2.4%, P < 0.001), but radial strain had a very heterogeneous distribution and variation. In the longitudinal direction from the base to the apex of the left ventricle, there was a trend of decreasing peak systolic longitudinal strain (basal: −23.3 ± 4.6%; mid: −13.7 ± 7.3%; apical: −13.2 ± 5.5%; P < 0.001). In conclusion, there are distinct distribution patterns of circumferential and longitudinal strain within the left ventricle in healthy Chinese subjects. These distribution patterns of strain may provide unique profiles for further study in different types of myocardial disease.

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Section: Discussionmentioning

confidence: 86%

mentioning

confidence: 99%

Distribution pattern of left-ventricular myocardial strain analyzed by a cine MRI based deformation registration algorithm in healthy Chinese volunteers

Liu

Yang

Wan

et al. 2017

Sci Rep

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“…The commercially available EchopacPC software uses a weighted linear regression of the velocities over the SL (10). The true acquisition area with this software extends one-half SL above and below the ROI, as illustrated elsewhere (6,22). Care was thus taken not to place the ROIs within a distance of one-half SL from the epicardium and one-half SL from the endocardium.…”

Section: Methodsmentioning

confidence: 99%

“…Reference values for the normal LV rotation gradient from apex to base using echocardiography are thus needed. Increased interest has recently been shown for myocardial multilayer strain measurements (2,3,6,14,21,27). In contrast with methods averaging strain over the wall, multilayer analysis allows for more layer-specific information regarding the functional state of myocardial fibers at different depths of the wall.…”

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confidence: 98%

Left ventricular strain, rotation, and torsion as markers of acute myocardial ischemia

Moen

Salminen

Grong

et al. 2011

American Journal of Physiology-Heart and Circulatory Physiology

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This study investigates how tissue Doppler imaging (TDI) and speckle tracking echocardiography (STE) describe regional myocardial deformation during controlled reductions of left anterior descending (LAD) coronary artery perfusion pressure. In eight anesthetized pigs, a shunt with constrictor was installed from the brachiocephalic artery to the LAD. Data were obtained with open shunt, followed by four degrees of stenosis (S1-S4) of increasing severity: S1, ∼15%; S2, ∼35%; S3, ∼50%; and S4, ∼60% reductions of LAD perfusion pressure. At each situation, microspheres for perfusion measurements were injected and left ventricular (LV) short- and long-axis cineloops were recorded. In the anterior wall, radial, circumferential, and longitudinal one-layer STE strain, one-layer radial TDI strain, and three-layer radial TDI and STE strain were measured. LV peak mean rotation was measured at six equidistant levels from apex to base (in 7 pigs). LV torsion was calculated from end-systolic mean rotation. With open shunt, three-layer TDI analysis showed a transmural strain gradient with no perfusion gradient. Perfusion, one-layer TDI strain, and strain in the mid- and subendocardium from three-layer TDI were reduced at S2 (P < 0.05). STE strain was not affected until S3 (P < 0.05). Peak mean rotation, increasing toward the apex, decreased at the three apical levels at S4 (P < 0.05). LV torsion did not decrease (P = 0.26). In conclusion, TDI strain detected dysfunction already with minor changes in global hemodynamics, whereas STE strain was first reduced with moderate changes. LV peak mean rotation was not reduced until severe reduction of LAD perfusion pressure, but remained increasingly counterclockwise toward the apex. LV torsion remained unaffected by ischemia.

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“…In the present study, we aimed to correlate the potential differences in rotational velocities of individual LV segments with ventricular insertion sites or major heart vessels located in close proximity with the left ventricle. Considering recent interest in myocardial multilayer measurements, which provide more layer-specific information about the functional state of myocardium at different levels [5][6][7][8][9][10], separate measurements of rotational myocardial velocities for the inner (endocardial), middle (transmural) and outer (epicardial) layers of the LV wall were performed for 16 ventricular segments.…”

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confidence: 99%

Effects of ventricular insertion sites on rotational motion of left ventricular segments studied by cardiac MR

Codreanu

Robson²,

Rider³

et al. 2013

BJR

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Radial deformation by tissue Doppler imaging in multiple myocardial layers

Abstract: We have demonstrated that it is feasible to measure radial velocity, strain rate and strain in up to three individual layers in young healthy humans, and the diagnostic potentials should be tested on patient groups.

Cited by 6 publications

References 22 publications

Distribution pattern of left-ventricular myocardial strain analyzed by a cine MRI based deformation registration algorithm in healthy Chinese volunteers

Distribution pattern of left-ventricular myocardial strain analyzed by a cine MRI based deformation registration algorithm in healthy Chinese volunteers

Left ventricular strain, rotation, and torsion as markers of acute myocardial ischemia

Effects of ventricular insertion sites on rotational motion of left ventricular segments studied by cardiac MR

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