Alternation of Right Ventricular Contraction Pattern in Healthy Children

Hashimoto, Ikuo; Watanabe, Kazuhiro

doi:10.1253/circj.cj-14-0083

Cited by 18 publications

(9 citation statements)

References 32 publications

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“…After an endurance race, conventional parameters suggest a less pronounced decrease of longitudinal shortening compared to ejection fraction, which also refers to a post-race functional shift [23]. Moreover, there is a growing interest in separated evaluation of longitudinal and radial RV function in pediatric cardiology patients [24]. These studies have shown the importance of the varying contribution of longitudinal and radial component in certain conditions, but did not provide distinct quantitative assessment for these phenomena.…”

Section: Discussionmentioning

confidence: 99%

Quantification of the relative contribution of the different right ventricular wall motion components to right ventricular ejection fraction: the ReVISION method

Lakatos

Tősér

Tokodi

et al. 2017

Cardiovasc Ultrasound

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Three major mechanisms contribute to right ventricular (RV) pump function: (i) shortening of the longitudinal axis with traction of the tricuspid annulus towards the apex; (ii) inward movement of the RV free wall; (iii) bulging of the interventricular septum into the RV and stretching the free wall over the septum. The relative contribution of the aforementioned mechanisms to RV pump function may change in different pathological conditions.Our aim was to develop a custom method to separately assess the extent of longitudinal, radial and anteroposterior displacement of the RV walls and to quantify their relative contribution to global RV ejection fraction using 3D data sets obtained by echocardiography.Accordingly, we decomposed the movement of the exported RV beutel wall in a vertex based manner. The volumes of the beutels accounting for the RV wall motion in only one direction (either longitudinal, radial, or anteroposterior) were calculated at each time frame using the signed tetrahedron method. Then, the relative contribution of the RV wall motion along the three different directions to global RV ejection fraction was calculated either as the ratio of the given direction’s ejection fraction to global ejection fraction and as the frame-by-frame RV volume change (∆V/∆t) along the three motion directions.The ReVISION (Right VentrIcular Separate wall motIon quantificatiON) method may contribute to a better understanding of the pathophysiology of RV mechanical adaptations to different loading conditions and diseases.Electronic supplementary materialThe online version of this article (doi:10.1186/s12947-017-0100-0) contains supplementary material, which is available to authorized users.

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Section: Discussionmentioning

confidence: 99%

Quantification of the relative contribution of the different right ventricular wall motion components to right ventricular ejection fraction: the ReVISION method

Lakatos

Tősér

Tokodi

et al. 2017

Cardiovasc Ultrasound

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“…The RV fractional area change obtained from a four‐chamber focused RV view is probably the only assessment in the setting of perioperative care that captures composite radial and longitudinal function . It has been demonstrated that the radial function plays a greater than expected role when TAPSE values fall below 15 mm in healthy children . The preoperative TAPSE (about 17 mm) was close to this value while the postoperative values were below this threshold in our patient population.…”

Section: Discussionmentioning

confidence: 99%

Perioperative echocardiography‐derived right ventricle function parameters and early outcomes after tetralogy of Fallot repair in mid‐childhood: a single‐center, prospective observational study

et al. 2016

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“…The RVWD is a novel original parameter that we devised for the evaluation of the RVAW motion in the radial direction . We found that the distance of the RVAW from the IVS was important in the evaluation of the geometrical relationship between the RV muscle fiber direction and its contraction pattern.…”

Section: Discussionmentioning

confidence: 99%

“…Specifically, the RV primarily consists of two cardiac muscles, the interventricular septum (IVS) and the RV free wall. The muscle fibers of the RV free wall are arranged longitudinally from the tricuspid valve to the apex under normal hemodynamic conditions; however, its orientation is altered from longitudinal to the lateral direction during condition of RV overload, which results in an increase in radial RV contraction . The relationship between the longitudinal RV contractility and the radial RV contractility that are derived from the physiological geometrical change has not been studied yet.…”

mentioning

confidence: 99%

“…The muscle fibers of the RV free wall are arranged longitudinally from the tricuspid valve to the apex under normal hemodynamic conditions; however, its orientation is altered from longitudinal to the lateral direction during condition of RV overload, 3 which results in an increase in radial RV contraction. 4,5 The relationship between the longitudinal RV contractility and the radial RV contractility that are derived from the physiological geometrical change has not been studied yet. We speculated that the RV geometry and the relationship between the longitudinal RV contractility and the radial RV contractility are important for understanding the RV systolic mechanism.…”

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confidence: 99%

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Geometry‐Related Right Ventricular Systolic Function Assessed by Longitudinal and Radial Right Ventricular Contractions

Hashimoto

Watanabe

2016

Echocardiography

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The aim of our study was to evaluate the geometry-related right ventricular (RV) systolic function under normal hemodynamics by assessing the longitudinal and the radial RV contractions in children. We examined 953 healthy children. We measured tricuspid annular plane systolic excursion (TAPSE), RV anterior wall displacement from the interventricular septum (RVWD), and RV to left ventricular diameter ratio (RV/LV ratio) using M-mode echocardiography. The z-values were calculated as geometrical parameters of the TAPSE (z-TAPSE), the RVWD (z-RVWD), and the RV/LV ratio (z-RV/LV). The RV stroke volume (RVSV) was measured using Doppler echocardiography and standardized using the z-value (z-RVSV). The z-TAPSE was no or weakly negatively correlated with both the z-RVWD (r = -0.18, P < 0.0001) and the z-RV/LV (r = -0.12, P < 0.0001). In contrast, the z-RV/LV correlated positively with the z-RVWD (r = 0.61, P < 0.0001). The z-RVSV correlated only with the z-TAPSE (r = 0.30, P < 0.0001). Although the radial RV motion increases with the progression of RV dilatation, the RVSV is not associated with radial RV motion. In contrast, the RVSV relates to the longitudinal RV motion independently of the radial RV motion under the normal physiological condition. We presume that the RV contraction patterns change related to the RV geometry under various hemodynamic conditions.

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Alternation of Right Ventricular Contraction Pattern in Healthy Children

Cited by 18 publications

References 32 publications

Quantification of the relative contribution of the different right ventricular wall motion components to right ventricular ejection fraction: the ReVISION method

Quantification of the relative contribution of the different right ventricular wall motion components to right ventricular ejection fraction: the ReVISION method

Perioperative echocardiography‐derived right ventricle function parameters and early outcomes after tetralogy of Fallot repair in mid‐childhood: a single‐center, prospective observational study

Geometry‐Related Right Ventricular Systolic Function Assessed by Longitudinal and Radial Right Ventricular Contractions

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