Left Ventricular Systolic and Diastolic Function During Early Neonatal Period Using Transthoracic Echocardiography.

Shiota, Terukazu; Harada, Kenji; Takada, Goro

doi:10.1620/tjem.197.151

Cited by 9 publications

(7 citation statements)

References 27 publications

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“…Shiota et al reported that LVDds determined with conventional echocardiography were significantly larger 2 h after birth than 12 h after birth and later [4]. Harada et al [5] and Agata et al [6] reported similar results using the pulsed Doppler technique.…”

Section: Influence Of the Flow Through The Ductus Arteriosusmentioning

confidence: 87%

“…There have been some reports regarding LVDds during early neonatal periods. However, these reports did not discuss the influence of the elliptic shape in the short-axis view [4][5][6]. The purpose of this study was to determine the implications of LVDd data determined during this period.…”

Section: Introductionmentioning

confidence: 96%

“…The following were the objectives of this study: (1) to show the changes in the flatness ratio in the shortaxis view, (2) to assess the transition of the endocardiac circumference length of the internal margin of the left ventricle in the short-axis view in physiological pulmonary hypertension, (3) to compare real LVDds and normal LVDds that were estimated by the formula previously reported, and (4) to reveal what the real LVDds imply at this age.…”

Section: Introductionmentioning

confidence: 99%

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Interpretation of left ventricular dimensions of neonates obtained from echocardiographic examinations during the early neonatal period

Nagasawa

2013

Journal of Neonatal-Perinatal Medicine

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BACKGROUND: In neonates without physiological pulmonary hypertension, left ventricular end-diastolic dimensions (LVDd) are determined with two-dimensional echocardiography and formulated equations. However, there has not been discussed the meanings of dimensions in early neonatal periods, although the short-axis view of the left ventricle is not round at this age. The objective of this study was to assess LVDd in neonates during early neonatal periods. METHODS:The study group consisted of 460 full-term neonates (230 boys; 230 girls) without congenital heart disease. The iE33 apparatus was employed to examine and measure the LVDds and the longest and shortest dimensions in the short-axis view. RESULTS: A significant difference was observed between the real LVDds and the estimated normal dimensions that were calculated from the formula; LVDd(mm) = 0.352×Ht(cm)+1.86, (P = 0.020). The mean LVDds were estimated to be 97% of the normal LVDds. The real LVDds were influenced by the angle formed by the real LVDds and the longest dimension. CONCLUSIONS: The real LVDds were shorter than normal LVDds. These findings establish normal values for LVDds in the early neonatal period.

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Section: Influence Of the Flow Through The Ductus Arteriosusmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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Interpretation of left ventricular dimensions of neonates obtained from echocardiographic examinations during the early neonatal period

Nagasawa

2013

Journal of Neonatal-Perinatal Medicine

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“…It is well known that the DA constricts rapidly after birth, with functional closure occurring within 12 to 36 h in the majority of term infants. Experimental data for DA diameter (DAD) changes in humans can be found in Rasanen et al (11), for the full-term fetus, and in several other publications (25)(26)(27)(28) for term neonates, during the first 24 h of life. To model DA closure, we used a dynamic resistance that increases with neonatal age.…”

Section: Methodsmentioning

confidence: 99%

A Model for Educational Simulation of Hemodynamic Transitions at Birth

et al. 2010

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Birth is characterized by swift and complex transitions in hemodynamic and respiratory variables. Unrecognized pathologies or incidents may quickly become fatal or cause permanent damage. This article introduces an essential component of an acute perinatal care simulator, namely a model for educational simulation of normal hemodynamic transitions seen during and shortly after birth. We explicitly formulate educational objectives and adapt a preexisting model for the simulation of neonatal cardiovascular physiology to include essential aspects of fetal hemodynamics. From the scientific literature, we obtain model parameters that characterize these aspects quantitatively. The fetal model is controlled by a time-and event-based script of changes occurring at birth, such as onset of breathing and cord clamping, and the transitory phase up to 24 h after birth. Comparison of simulation results with published target data confirms that realistic simulated hemodynamic vital signs are achieved. (Pediatr Res 67: 158-165, 2010) P erinatal acute care is associated with specific clinical demands and challenges. The relatively small number of acute care cases occurring in many institutions, together with the presence of senior staff assuming the responsibility for their management, may hinder the establishment of adequate training for less experienced individuals. In other areas of acute care medicine, realistic simulators contribute to training of healthcare professionals and to patient safety.Clinically relevant learning objectives for medical staff in Neonatology include the recognition of cardiovascular signs and symptoms occurring in pathologies that manifest shortly after birth, such as persistent pulmonary hypertension, left ventricular overload by a patent ductus arteriosus (DA), myocardial depression, and hemorrhage.This article introduces a fundamental component of a perinatal acute care simulator, namely a simulation engine, for normal hemodynamic transitions from the fetal to the early neonatal period. A simulation engine can contribute to a life-like training environment by providing real-time, automatic evolution of clinical signs and monitored signals and of their response to therapeutic interventions. To be able to simulate normal physiology and provide a platform for future simulation of the above-mentioned incidents and pathologies, it is necessary that the engine reflect essential aspects of fetal hemodynamics and its subsequent transition to the neonate. Among others, structures such as lungs, placenta, heart, systemic arterial circulation, and the various fetal shunts need to be included. The simulation engine should be able to simulate realistic blood pressures and flow rates in these structures during fetal, transitional, and neonatal periods. METHODSThe proposed simulation engine for normal hemodynamic transitions from the fetal to the early neonatal period consists of a fetal hemodynamic model controlled by a time-and event-based script (1). The script triggers events occurring at birth such ...

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“…may influence echocardiographic parameters (1,2). With birth, neonatal circulation is established so that lungs begin to perform gas exchange, pulmonary blood flow is increased and pulmonary vascular resistance is decreased (3).…”

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confidence: 99%

The Impact of Delivery Type on Ventricular Performances of Healthy Neonates

Cilsal

2020

Gynecol Obstet Reprod Med

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Objective: The present study aims to evaluate how the mode of delivery affects the alterations in myocardial functions of healthy newborns within the first month of life. study desıgn: This is a prospective review of 60 healthy term newborns whose cardiac functions were examined by M-mode and tissue Doppler echocardiography on the first day of their lives and subsequently at one month of age. Results: At the first visit, the tricuspid annular plane systolic excursion was significantly higher in vaginally delivered newborns. Mitral and tricuspid E velocities and E/E’ ratio of the right ventricle and isovolumic relaxation time of right ventricle were also significantly higher in newborns delivered by cesarean section. Both of the groups had statistically similar M-mode and tissue Doppler echocardiography measurements at the time of the second visit. Only the increase in the tricuspid A velocity and myocardial performance index measured from septum between the first and second visits were significantly higher in the cesarean delivery group. When compared with the first visit, both isovolumic contraction time and isovolumic relaxation time were lower between the groups but myocardial performance index values were increased without significance at the second visit.Conclusion: Diastolic indices were significantly elevated in newborns delivered by cesarean section than neonates delivered by vaginal route. After one-month-long follow up, an increase was observed in diastolic ventricle functions of the vaginally delivered newborns but this increase was statistically insignificant. Cesarean delivery might be associated with the impairment in ventricular functions and, thus, a delay in the improvement and maturation of cardiac functions.

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Left Ventricular Systolic and Diastolic Function During Early Neonatal Period Using Transthoracic Echocardiography.

Cited by 9 publications

References 27 publications

Interpretation of left ventricular dimensions of neonates obtained from echocardiographic examinations during the early neonatal period

Interpretation of left ventricular dimensions of neonates obtained from echocardiographic examinations during the early neonatal period

A Model for Educational Simulation of Hemodynamic Transitions at Birth

The Impact of Delivery Type on Ventricular Performances of Healthy Neonates

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