Assessment of the Helical Ventricular Myocardial Band Using Standard Echocardiography

Hayabuchi, Yasunobu; Sakata, Miho; Kubo, Shoji

doi:10.1111/echo.12624

Cited by 24 publications

(39 citation statements)

References 22 publications

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“…This is contrary to previous findings from normal subjects [5,7]. Boettler et al [5] found similar LS on the right and on the left VS in healthy adults (n = 30, age range 18-53 years) using Doppler myocardial imaging.…”

Section: Discussioncontrasting

confidence: 92%

“…The feasibility and reproducibility of 2D strain measurement in the present study were in agreement with previous studies [6][7][8][9][10][11]26], but feasibility was lower for the RV free wall than for the VS. For inter-observer reproducibility, the ICC showed substantial agreement on both sides of the VS and the LV, whereas the ICC for the RV free wall was modest. These results might be related to the method of image acquisition of the RV; a standard apical four-chamber view was used in order to avoid interfering with respiration of small infants.…”

Section: Discussionsupporting

confidence: 92%

“…Boettler et al [5] found similar LS on the right and on the left VS in healthy adults (n = 30, age range 18-53 years) using Doppler myocardial imaging. Hayabuchi et al [7] reported similar findings in normal children (n = 132, age range 1.0-10.0 years) using 2D speckle-tracking echocardiography. They speculated Fig.…”

Section: Discussionmentioning

confidence: 56%

“…On the other hand, the ventricular septum (VS) is visualized far better than the RV free wall on echocardiography. Furthermore, it has been shown that the VS is a morphologically and functionally bilayered structure divided by a bright line [5][6][7], and the right and left sides of the VS respond differently to ventricular overload [6].…”

Section: Introductionmentioning

confidence: 99%

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Longitudinal systolic strain of the bilayered ventricular septum during the first 72 hours of life in preterm infants

et al. 2015

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Section: Discussioncontrasting

confidence: 92%

Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 56%

Section: Introductionmentioning

confidence: 99%

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Longitudinal systolic strain of the bilayered ventricular septum during the first 72 hours of life in preterm infants

et al. 2015

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“…Towards the apical doi: 10.7243/2055-091X-2-2 cone, the lateral LV wall became thinner, while the interventricular septum became thicker than that in other levels. Similar features were recorded in bovine heart [16,17]. These differences might reflect the functional or developmental species-related differences of heart structure.…”

Section: Discussionsupporting

confidence: 68%

Histological architecture of cardiac myofibers composing the left ventricle of murine heart

Gouda¹,

Elewa²,

Selim³

2015

J Histol Histopathol

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Background: Despite the fact that the exact architecture and orientation of left ventricular myocardial fibers are critical to cardiac functions either in health or disease, it is still debated. Aim of the work: Histological demonstration of the transverse alignment of the myofibers making the left ventricular mass was applied to validate different anatomical speculations of cardiac myofibers organization; mainly Streeter's conjecture and the ventricular myocardial band model of Torrent-Guasp. Material and methods: Six healthy adult male C57BL/6N mice were utilized. Their hearts were separated into atria and ventricles. Then, both ventricles were divided into four levels [base, upper mid, lower mid and apex]. Paraffin step-serial transverse sections were stained with H&E and Masson's trichrome stains. Morphometrical measurements of the thickness of the anterior, posterior, and lateral walls of the left ventricle (LV) as well as the inter-ventricular septal wall were realized with ImageJ software. For data analyses among the four levels of LV, Scheffé's method was applied for multiple comparisons when a significant difference was observed by Kruskal-Wallis test (p<0.05). Results: Examination of the LV from its base to its apex revealed obvious changes in the thickness of its walls and inter-ventricular septum as well as in its cavity shape. Interestingly, the myocardial fibers showed different running patterns [longitudinal, oblique and circular] among different levels as well as within the same level from sub-epicardial to the endocardial region. Throughout all levels, the subepicardial myofibers showed longitudinal orientation while that of the intermediate wall revealed either oblique [in upper mid-level] or circular orientations in other levels. The sub-endocardial fibers were mostly longitudinal with the presence of some circular fibers in the base and upper-mid regions. Masson's trichrome sections revealed a trivial amount of collagen fibers just around each individual myocyte without any bundle formation. Conclusion:The presence of different running patterns of the myocardial fibers among different levels of LV as well as within the same level indicates multiple rolling of the myocardial fibers. Thus, we suggested that the band model by Torrent-Guasp accounts for the patterns of myocardial fiber architecture forming the left ventricle.

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Functional Morphology of the Heart

Furst

2019

The Heart and Circulation

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Assessment of the Helical Ventricular Myocardial Band Using Standard Echocardiography

Abstract: There is a helical ventricular myocardial band that can be observed in standard echocardiographic images.

Cited by 24 publications

References 22 publications

Longitudinal systolic strain of the bilayered ventricular septum during the first 72 hours of life in preterm infants

Longitudinal systolic strain of the bilayered ventricular septum during the first 72 hours of life in preterm infants

Histological architecture of cardiac myofibers composing the left ventricle of murine heart

Functional Morphology of the Heart

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