Estimation of Right Ventricular Mass by Two-dimensional Echocardiography

Pontes, Sérgio C.; Assef, Jorge Eduardo; Barretto, Rodrigo B M; Chaccur, Paulo; Moreira, Dalmo Antônio Ribeiro; Nina, Vinicius José da Silva; Nunes, Frederico; Melani, Roberto H.; Correia, Edileide de Barros; Dinkuisen, Jarbas; Sousa, Amanda

doi:10.1016/j.echo.2005.01.036

Cited by 11 publications

(5 citation statements)

References 31 publications

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“…The RV free wall mass was calculated through a bidimensional approach, according to the method described by Pontes and colleagues. 14 RV and LV ejection fractions were estimated by area ϫ length and Teichholz methods, respectively. 15…”

Section: Echocardiographic Studymentioning

confidence: 99%

Reversible pulmonary trunk banding III: Assessment of myocardial adaptive mechanisms—contribution of cell proliferation

Abduch

Assad

Rodriguez

et al. 2007

The Journal of Thoracic and Cardiovascular Surgery

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Section: Echocardiographic Studymentioning

confidence: 99%

Reversible pulmonary trunk banding III: Assessment of myocardial adaptive mechanisms—contribution of cell proliferation

Abduch

Assad

Rodriguez

et al. 2007

The Journal of Thoracic and Cardiovascular Surgery

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Section: Echocardiographic Studymentioning

confidence: 99%

“…The right ventricle final systolic (FSV) and final diastolic volumes (FDV) were obtained by the formula area x length in the longitudinal four-chamber slice. The hemodynamic efficiency was evaluated from the RV ejection fraction (RVEF), which was attained from the difference of the volumes using the formula proposed by Pontes et al [7].Weighing the heart masses After the end of the protocol of each animal, sacrifice was achieved by resection of the heart. Before anesthetic induction, the RV, PT and aorta pressures were measured.…”

mentioning

confidence: 99%

<![CDATA[<B>Adjustable pulmonary trunk banding</B>: <B>comparison of two methods of acute subpulmonary ventricle hypertrophy</B>]]>

Assad¹,

Rodriguez²,

Abduch³

et al. 2006

Braz. j. cardiovasc. surg.

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Bandagem ajustável do tronco pulmonar: comparação de dois métodos de hipertrofia aguda do ventrículo subpulmonarAdjustable pulmonary trunk banding: comparison of two methods of acute subpulmonary ventricle hypertrophy Abstract Objective: This study compares ventricular hypertrophy induced by continuous versus intermittent systolic overload of the pulmonary ventricle (RV) of young goats.Methods: Three groups of seven goats were used (control, continuous, and intermittent). Systolic overload was maintained for 96 hours in the continuous group, while the intermittent group suffered four 12-hour periods of systolic overload, alternating with 12-hour resting periods. Echocardiographic and hemodynamic evaluations were performed every day. The animals were then killed for myocardial water content and weight evaluation.Results: Both study groups achieved significant increases in RV mass (p<0.05). However, significant increases of the septum mass were observed only in the Intermittent Group (p<0.05). A greater increase in the RV wall thickness was observed in the Intermittent Group (p<0.05). There was a significant difference in RV diastolic volume between the two groups (p= 0.01), with a greater RV dilation in the Continuous Group after 24 hours of continuous overload (p< 419ASSAD, RS ET AL -Adjustable pulmonary trunk banding: comparison of two methods of acute subpulmonary ventricle hypertrophy Braz J Cardiovasc Surg 2006; 21(4): 418-428 INTRODUCTIONThe concept of rapid preparation of the left ventricular (LV) was introduced by the group from Boston in 1989 to treat transposition of the great arteries (TGA) after the neonatal period. Retraining of the subpulmonary ventricle was obtained in a mean time of nine days and after this Jatene's operation was performed [1]. These authors achieved good preliminary results, however, they were not reproduced in other centers due to high morbimortality. One of the greatest limitations of this technical approach is related to the lack of adjustability of the pulmonary trunk (PT) banding. The degree of PT banding may be inadequate or imprecise and can cause an important acute systolic overload of the LV [2,3].Heart hypertrophy is the main adaptive response of a heart submitted to physiological or pathological overload. It is interesting to note that the acquisition of LV mass during physical conditioning of athletes who practice swimming for example, reaches a peak in about only one week of training. Then the LV mass remains relatively constant [4] In an attempt to improve the rapid hypertrophic process without causing injury to the myocardium of the subpulmonary ventricle, we tried to find an analogy between the physiological hypertrophic processes in static-type exercises and intermittent PT banding, where periods of systolic overload are alternated with periods of subpulmonary ventricle relaxation.We formed a hypothesis that the subpulmonary ventricle, submitted to the gradual and progressive systolic overload alternated with periods of relaxation, could cause a more benefici...

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“…The end-diastolic thicknesses of the cardiac masses were measured by 2-dimensional echocardiography through the parasternal long-axis view, at the level of the mitral valve leaflet tips. [15]…”

Section: Echocardiographymentioning

confidence: 99%

Reversible pulmonary trunk banding: Myocardial vascular endothelial growth factor expression in young goats submitted to ventricular retraining

Assad

Rocha²,

Aiello

et al. 2020

PLoS ONE

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BackgroundVentricle retraining has been extensively studied by our laboratory. Previous studies have demonstrated that intermittent overload causes a more efficient ventricular hypertrophy. The adaptive mechanisms involved in the ventricle retraining are not completely established. This study assessed vascular endothelial growth factor (VEGF) expression in the ventricles of goats submitted to systolic overload. OPEN ACCESS Citation: Assad RS, Rocha EAV, Aiello VD, Meniconi TA, Abduch MCD, Thomaz PG, et al. (2020) Reversible pulmonary trunk banding: Myocardial vascular endothelial growth factor expression in young goats submitted to ventricular retraining. PLoS ONE 15(2): e0217732. https://doi.Intermittent systolic overload promotes greater upregulation of VEGF expression in the subpulmonary ventricle, an adaptation that provides a mechanism for increased myocardial perfusion during the rapid myocardial hypertrophy of young goats.

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Estimation of Right Ventricular Mass by Two-dimensional Echocardiography

Cited by 11 publications

References 31 publications

Reversible pulmonary trunk banding III: Assessment of myocardial adaptive mechanisms—contribution of cell proliferation

Reversible pulmonary trunk banding III: Assessment of myocardial adaptive mechanisms—contribution of cell proliferation

<![CDATA[<B>Adjustable pulmonary trunk banding</B>: <B>comparison of two methods of acute subpulmonary ventricle hypertrophy</B>]]>

Reversible pulmonary trunk banding: Myocardial vascular endothelial growth factor expression in young goats submitted to ventricular retraining

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