Functional limitations in young children with congenital heart defects after cardiac surgery

Differences in Quality of Life in Children Across the Spectrum of Congenital Heart Disease

OBJECTIVE

To create complexity groups based upon a patient's cardiac medical history and to test for group differences in health-related quality of life (HRQOL).

METHODS

Patients 8-18 years with congenital heart disease (CHD) and parent-proxies from the Pediatric Cardiac Quality of Life Inventory (PCQLI) Testing Study were included. Outcome variables included PCQLI Total, Disease Impact, and Psychosocial Impact scores. Using a patient's medical history (cardiac, neurologic, psychological, and cognitive diagnosis), latent class analysis (LCA) was used to create CHD complexity groups. Covariates included demographics and burden of illness (number of: school weeks missed, physician visits in the past year, and daily medications). Generalized estimation equations tested for differences in burden of illness and patient and parent-proxy PCQLI scores.

RESULTS

Using 1482 CHD patients (60% male; 84% white; age 12.3 ± 3.0 years), latent class analysis (LCA) estimates showed 4 distinct CHD complexity groups (Mild, Moderate 1, Moderate 2, and Severe). Increasing CHD complexity was associated with increased risk of learning disorders, seizures, mental health problems, and history of stroke. Greater CHD complexity was associated with greater burden of illness (P < .01) and lower patient- and parent-reported PCQLI scores (P < .001).

CONCLUSIONS

LCA identified 4 congenital heart disease (CHD) complexity groupings. Increasing CHD complexity was associated with higher burden of illness and worse patient- and parent-reported HRQOL.

Fetal circulatory physiology and brain development in complex congenital heart disease: A multi-modal imaging study

OBJECTIVE

Fetuses with complex congenital heart disease have altered physiology, contributing to abnormal neurodevelopment. The effects of altered physiology on brain development have not been well studied. We used multi-modal imaging to study fetal circulatory physiology and brain development in hypoplastic left heart syndrome (HLHS) and d-transposition of the great arteries (TGA).

METHODS

This prospective, cross-sectional study investigated individuals with fetal congenital heart disease and controls undergoing fetal echocardiography and fetal brain MRI. MRI measured total brain volume and cerebral oxygenation by the MRI quantification method T2*. Indexed cardiac outputs (CCOi) and vascular impedances were calculated by fetal echocardiography. Descriptive statistics assessed MRI and echocardiogram measurement relationships by physiology.

RESULTS

Sixty-six participants enrolled (control = 20; HLHS = 25; TGA = 21), mean gestational age 33.8 weeks (95% CI: 33.3-34.2). Total brain volume and T2* were significantly lower in fetuses with cardiac disease. CCOi was lower in HLHS, correlating with total brain volume - for every 10% CCOi increase, volume increased 8 mm3 (95% CI: 1.78-14.1; p = 0.012). Echocardiography parameters and cerebral oxygenation showed no correlation. TGA showed no CCOi or aortic output correlation with MRI measures.

CONCLUSIONS

In HLHS, lower cardiac output is deleterious to brain development. Our findings provide insight into the role of fetal cardiovascular physiology in brain health.

Evaluation of neurodevelopmental impairments and risk factors in children following cardiac surgery: The first cohort from China

Objective

Neurodevelopmental impairment has been realized as the most common complication in children with congenital heart disease undergoing cardiac surgery during the past 30 years. But little attention has been paid to this problem in China. The potential risk factors for adverse outcomes include demographic, perioperative, and socioeconomic factors, which are vastly different in China compared with the developed countries in previous reports.

Methods

Four hundred twenty-six patients (aged 35.9 ± 18.6 months) at about 1- to 3-year follow-up after cardiac surgery were prospectively enrolled from March 2019 to February 2022. Griffiths Mental Development Scales-Chinese was used to evaluate the quotients of overall development and 5 subscales of the child's locomotor, language, personal-social, eye-hand coordination, and performance skills. Demographic, perioperative, socioeconomic, and feeding type during the first year of life (breastfeeding, mixed, or never breastfeeding) were examined to identify the risk factors for adverse neurodevelopmental outcomes.

Results

Mean scores were 90.0 ± 15.5 for development quotient, 92.3 ± 19.4 for locomotor, 89.6 ± 19.2 for personal-social, 85.5 ± 21.7 for language, 90.3 ± 17.2 for eye-hand coordination, and 92 ± 17.1 for performance subscales. For the entire cohort, the impairment in at least 1 subscale was found in 76.1% of the cohort (>1 SD below population mean) with 50.1% being severe (>2 SDs below the mean). The significant risk factors included prolonged hospital stay, peak level of postoperative C-reactive protein, socioeconomic status, and never breastfeeding or mixed feeding.

Conclusions

Neurodevelopmental impairment is substantial in terms of incidence and severity in children with congenital heart disease undergoing cardiac surgery in China. Risk factors contributing to the adverse outcomes included prolonged hospital stay, early postoperative inflammatory response, socioeconomic status, and never breastfeeding or mixed feeding. There is an urgent need for standardized follow-up and neurodevelopmental assessment in this special group of children in China.

Hospitalized Infants With Medical Complexity Experience Slow Acquisition of Gross Motor Skills

OBJECTIVES

The progression of infant gross motor development during an acute hospitalization is unknown. Understanding gross motor skill acquisition in hospitalized infants with complex medical conditions is necessary to develop and evaluate interventions that may lessen delays. Establishing a baseline of gross motor abilities and skill development for these infants will guide future research. The primary purposes of this observational study were to: (1) describe gross motor skills of infants with complex medical conditions (n = 143) during an acute hospitalization and (2) evaluate the rate of change in gross motor skill development in a heterogenous group of hospitalized infants with prolonged length of stay (n = 45).

METHODS

Gross motor skills in hospitalized infants aged birth to 18 months receiving physical therapy were evaluated monthly using the Alberta Infant Motor Scale. Regression analysis was completed to assess rate of change in gross motor skills.

RESULTS

Of the 143 participants, 91 (64%) demonstrated significant motor delay at initial evaluation. Infants with prolonged hospitalization (mean 26.9 ± 17.5 weeks) gained new gross motor skills at a significant rate of 1.4 points per month in Alberta Infant Motor Scale raw scores; however, most (76%) continued with gross motor delays.

CONCLUSIONS

Infants with complex medical conditions admitted for prolonged hospitalization frequently have delayed gross motor development at baseline and have slower than typical acquisition of gross motor skills during hospitalization, gaining 1.4 new skills per month compared with peers acquiring 5 to 8 new skills monthly. Further research is needed to determine effectiveness of interventions designed to mitigate gross motor delay in hospitalized infants.

Paediatric cardiologist adherence to American Heart Association neurodevelopmental recommendations for CHD patients

A 2012 American Heart Association statement concluded that children with CHD are at an increased risk for neurodevelopmental delays. Routine surveillance and evaluation throughout childhood are recommended. To assess paediatric cardiologist compliance with American Heart Association guidelines and developmental referral practices, a survey was distributed to paediatric cardiologists nationwide (n = 129). The majority of participants (69%) stated they were somewhat familiar or not familiar with the American Heart Association statement and were concerned about patients not being properly referred to specialists for developmental evaluation. Forty paediatric cardiologists (31%) indicated that their institution did not have a neurodevelopmental cardiology programme. Of these, 25% indicated they generally did not refer CHD patients for neurodevelopmental evaluation, 45% performed surveillance and referred if warranted, and 30% generally referred all patients for surveillance. Lastly, 43% of paediatric cardiologists did not feel responsible for developmental surveillance, and 11% did not feel responsible for referrals. To ensure all children with CHD are appropriately screened and referred, paediatricians and cardiologists must work together to address differing impressions of accountability for surveillance and screening of children with CHD.

Early Functional Status After Surgery for Congenital Heart Disease: A Single-Center Retrospective Study

OBJECTIVES

The objective of this study is to investigate the change in functional status in infants, children, and adolescents undergoing congenital heart surgery using the Functional Status Scale.

DESIGN

A single-center retrospective study.

SETTING

A 26-bed cardiac ICU in a free-standing university-affiliated tertiary children's hospital.

PATIENTS

All patients 0-18 years who underwent congenital heart surgery from January 1, 2014, to December 31, 2017.

INTERVENTIONS

None.

MEASUREMENTS AND MIN RESULTS

The primary outcome variable was change in Functional Status Scale scores from admission to discharge. Additionally, two binary outcomes were derived from the primary outcome: new morbidity (change in Functional Status Scale ≥ 3) and unfavorable functional outcome (change in Functional Status Scale ≥ 5); their association with risk factors was assessed using modified Poisson regression. Out of 1,398 eligible surgical encounters, 65 (4.6%) and 15 (1.0%) had evidence of new morbidity and unfavorable functional outcomes, respectively. Higher Surgeons Society of Thoracic and the European Association for Cardio-Thoracic Surgery score, single-ventricle physiology, and longer cardiopulmonary bypass time were associated with new morbidity. Longer hospital length of stay was associated with both new morbidity and unfavorable outcome.

CONCLUSIONS

This study demonstrates the novel application of the Functional Status Scale on patients undergoing congenital heart surgery. New morbidity was noted in 4.6%, whereas unfavorable outcome in 1%. There was a small change in the total Functional Status Scale score that was largely attributed to changes in the feeding domain. Higher Society of Thoracic and the European Association for Cardio-Thoracic Surgery score, single-ventricle physiology, and longer cardiopulmonary bypass times were associated with new morbidity, whereas longer hospital length of stay was associated with both new morbidity and unfavorable outcome. Further studies with larger sample size will need to be done to confirm our findings and to better ascertain the utility of Functional Status Scale on this patient population.

Predictors of Neurological Outcome Following Infant Cardiac Surgery Without Deep Hypothermic Circulatory Arrest

The aim of this study is to describe the clinical characteristics, perioperative course and neuroimaging abnormalities of infants with congenital heart disease (CHD) undergoing heart surgery without deep hypothermic circulatory arrest (DHCA) and identify variables associated with neurological outcome. Infants with CHD undergoing open-heart surgery without DHCA between 2009 and 2017 were identified from a cardiac surgery database. Full-term infants < 10 weeks of age at the time of surgery who had both a pre- and postoperative brain magnetic resonance imaging exam (MRI) were included. Clinical characteristics and perioperative variables were collected from the electronic medical record. Brain Injury Scores (BIS) were assigned to pre- and postoperative brain MRIs. Variables were examined for association with neurological outcome at 12 months of age or greater. Forty-two infants were enrolled in the study, of whom 69% (n = 29) had a neurological assessment ≥ to 12 months of age. Adverse neurological outcome was associated with longer intensive care unit (ICU) stay (P = 0.003), lengthier mechanical ventilation (P = 0.031), modified Blalock-Taussig (MBT) shunt procedure (P = 0.005) and postoperative seizures (P = 0.005). Total BIS scores did not predict outcome but postoperative infarction and/or intraparenchymal hemorrhage (IPH) was associated with worse outcome by multivariable analysis (P = 0.018). Infants with CHD undergoing open-heart surgery without DHCA are at increased risk of worse neurological outcome when their ICU stay is prolonged, mechanical ventilation is extended, MBT shunt is performed or when postoperative seizures are present. Cerebral infarctions and IPH on postoperative MRI are also associated with worse outcome.

The Current Status of Neuroprotection in Congenital Heart Disease

Neurological deficits are a serious and common sequelae of congenital heart disease (CHD). While their underlying mechanisms have not been fully characterized, their manifestations are well-known and understood to persist through adulthood. Development of therapies to address or prevent these deficits are critical to attenuate future morbidity and improve quality of life. In this review, we aim to summarize the current status of neuroprotective therapy in CHD. Through an exploration of present research in the pre-operative, intra-operative, and post-operative phases of patient management, we will describe existing clinical and bench efforts as well as current endeavors underway within this research area.

Physical Functioning After Admission to the PICU: A Scoping Review

Supplemental Digital Content is available in the text.

Objectives:

To conduct a scoping review to 1) describe findings and determinants of physical functioning in children during and/or after PICU stay, 2) identify which domains of physical functioning are measured, 3) and synthesize the clinical and research knowledge gaps.

Data Sources:

A systematic search was conducted in PubMed, Embase, Cumulative Index to Nursing and Allied Health Literature, and Cochrane Library databases following the Preferred Reporting Items for Systematic Reviews and Meta-analyses extension for Scoping Reviews guidelines.

Study Selection:

Two investigators independently screened and included studies against predetermined criteria.

Data Extraction:

One investigator extracted data with review by a second investigator. A narrative analyses approach was used.

Data Synthesis:

A total of 2,610 articles were identified, leaving 68 studies for inclusion. Post-PICU/hospital discharge scores show that PICU survivors report difficulties in physical functioning during and years after PICU stay. Although sustained improvements in the long-term have been reported, most of the reported levels were lower compared with the reference and baseline values. Decreased physical functioning was associated with longer hospital stay and presence of comorbidities. A diversity of instruments was used in which mobility and self-care were mostly addressed.

CONCLUSIONS:

The results show that children perceive moderate to severe difficulties in physical functioning during and years after PICU stay. Longitudinal assessments during and after PICU stay should be incorporated, especially for children with a higher risk for poor functional outcomes. There is need for consensus on the most suitable methods to assess physical functioning in children admitted to the PICU.

Predicting and Surviving Prolonged Critical Illness After Congenital Heart Surgery

OBJECTIVES

Prolonged critical illness after congenital heart surgery disproportionately harms patients and the healthcare system, yet much remains unknown. We aimed to define prolonged critical illness, delineate between nonmodifiable and potentially preventable predictors of prolonged critical illness and prolonged critical illness mortality, and understand the interhospital variation in prolonged critical illness.

DESIGN

Observational analysis.

SETTING

Pediatric Cardiac Critical Care Consortium clinical registry.

PATIENTS

All patients, stratified into neonates (≤28 d) and nonneonates (29 d to 18 yr), admitted to the pediatric cardiac ICU after congenital heart surgery at Pediatric Cardiac Critical Care Consortium hospitals.

INTERVENTIONS

None.

MEASUREMENTS AND MAIN RESULTS

There were 2,419 neonates and 10,687 nonneonates from 22 hospitals. The prolonged critical illness cutoff (90th percentile length of stay) was greater than or equal to 35 and greater than or equal to 10 days for neonates and nonneonates, respectively. Cardiac ICU prolonged critical illness mortality was 24% in neonates and 8% in nonneonates (vs 5% and 0.4%, respectively, in nonprolonged critical illness patients). Multivariable logistic regression identified 10 neonatal and 19 nonneonatal prolonged critical illness predictors within strata and eight predictors of mortality. Only mechanical ventilation days and acute renal failure requiring renal replacement therapy predicted prolonged critical illness and prolonged critical illness mortality in both strata. Approximately 40% of the prolonged critical illness predictors were nonmodifiable (preoperative/patient and operative factors), whereas only one of eight prolonged critical illness mortality predictors was nonmodifiable. The remainders were potentially preventable (postoperative critical care delivery variables and complications). Case-mix-adjusted prolonged critical illness rates were compared across hospitals; six hospitals each had lower- and higher-than-expected prolonged critical illness frequency.

CONCLUSIONS

Although many prolonged critical illness predictors are nonmodifiable, we identified several predictors to target for improvement. Furthermore, we observed that complications and prolonged critical care therapy drive prolonged critical illness mortality. Wide variation of prolonged critical illness frequency suggests that identifying practices at hospitals with lower-than-expected prolonged critical illness could lead to broader quality improvement initiatives.

Neurologic complications of pediatric congenital heart disease

Improved medical management and surgical outcomes have significantly decreased mortality in children with congenital heart disease; however, with increased survival, there is a greater lifetime exposure to neurologic complications with serious long-term neurodevelopmental consequences. Thus, recent focus has shifted to recognition and reduction of these extracardiac comorbidities. Vascular and infective complications, such as arterial ischemic stroke, infective endocarditis, and localization-related epilepsy are some of the most common neurologic comorbidities of congenital heart disease. In addition, it is now well recognized that congenital heart disease has an impact on overall brain development and contributes to adverse neurodevelopmental outcomes across multiple domains. The goal of this chapter is to summarize the most common neurologic comorbidities of congenital heart disease and its management.

Neurodevelopmental evaluation for school-age children with congenital heart disease: recommendations from the cardiac neurodevelopmental outcome collaborative

In 2012, the American Heart Association and the American Academy of Paediatrics released a scientific statement with guidelines for the evaluation and management of the neurodevelopmental needs of children with CHD. Decades of outcome research now highlight a range of cognitive, learning, motor, and psychosocial vulnerabilities affecting individuals with CHD across the lifespan. The number of institutions with Cardiac Neurodevelopmental Follow-Up Programmes and services for CHD is growing worldwide. This manuscript provides an expanded set of neurodevelopmental evaluation strategies and considerations for professionals working with school-age children with CHD. Recommendations begin with the referral process and access to the evaluation, the importance of considering medical risk factors (e.g., genetic disorders, neuroimaging), and the initial clinical interview with the family. The neurodevelopmental evaluation should take into account both family and patient factors, including the child/family's primary language, country of origin, and other cultural factors, as well as critical stages in development that place the child at higher risk. Domains of assessment are reviewed with emphasis on target areas in need of evaluation based on current outcome research with CHD. Finally, current recommendations are made for assessment batteries using a brief core battery and an extended comprehensive clinical battery. Consistent use of a recommended assessment battery will increase opportunities for research collaborations, and ultimately help improve the quality of care for families and children with CHD.

Impacts of an Interdisciplinary Developmental Follow-Up Program on Neurodevelopment in Congenital Heart Disease: The CINC Study

Objectives: This study investigates the impact of an early systematic interdisciplinary developmental follow-up and individualized intervention program on the neurodevelopment of children with complex congenital heart disease (CHD) who required cardiac surgery. Study Design: We prospectively enrolled 80 children with CHD: 41 were already followed at our neurocardiac developmental follow-up clinic from the age of 4 months, while 39 were born before the establishment of the program and therefore received standard health care. We conducted cognitive, motor, and behavioral assessments at 3 years of age. We used one-way multivariate analyses of variance to compare the neurodevelopmental outcome of both groups. Results: Between-group analyses revealed a distinct neurodevelopmental profile with clinically significant effect size (P < 0.001, partial η² = 0.366). Children followed at our clinic demonstrated better receptive language performances (P = 0.048) and tended to show higher scores on visuo-constructive tasks (P = 0.080). Children who received standard health care exhibited greater performances in working memory tasks (P = 0.032). We found no group differences on global intellectual functioning, gross and fine motor skills, and behaviors. Referral rates for specific remedial services were higher in patients followed at our neurocardiac clinic compared to the historical cohort (P < 0.005). Conclusions: Overall, the impact of the developmental follow-up and individualized intervention program on neurodevelopmental outcomes remains subtle. Nevertheless, results, although limited by several factors, point toward an advantage for the children who took part in the program regarding receptive language skills over children who received standard health care. We hypothesize that group differences may be greater with growing age. Further research involving larger cohorts is needed to clearly assess the effectiveness of neurocardiac developmental follow-up programs at school age.

Early intervention physical therapy using "Parent Empowerment Program" for children with Down syndrome in Pakistan: A feasibility study

PURPOSE

The aim of this study was to evaluate the feasibility and effectiveness of the Parent Empowerment Program (PEP) to help caretakers deliver a home program to promote developmental activities and gross motor function in their children with Down syndrome.

METHODS

Parents attended a 14-month program with training sessions 1-4 times a month. Outcomes were measured using a change in the Gross Motor Function Measure (GMFM-88) at baseline and assessment one.

RESULTS

Forty-eight families participated in the PEP. Children's mean age was 16.2 ± 10.8 months. There were significant changes in GMFM-88 scores between baseline and assessment one; t (30) =-9.158, p< 0.001; 95% CI -14.6 - -22.9. Previous hospitalization significantly affected GMFM scores.

CONCLUSION

This study describes a clinically applied research that focuses on program design, development and evaluation. Findings indicate that the PEP is effective in improving gross motor function in children with Down's syndrome in Pakistan. Parents were satisfied with the program outcomes and were able to cope with the requirements at home. The PEP had favorable outcomes and may be an effective method to support PT services in resource poor countries.

[Formula: see text] Addressing the neurodevelopmental needs of children and adolescents with congenital heart disease: A review of the existing intervention literature

Congenital heart disease (CHD) is among the most prevalent birth defects in the United States. Given that children with CHD are at risk for differences with development, learning, and psychosocial functioning, effective intervention becomes a central tenant of recommendations following neuropsychological consultation and evaluation. The primary focus of this review is to summarize available interventions for children and adolescents with CHD. The existing CHD literature has concentrated on early developmental services, psychopharmacological treatment, and need for academic supports. The literature is limited with regard to intervention studies that target cognitive deficits and psychosocial difficulties. To address this discrepancy, efficacious interventions that have been used to mitigate these concerns within other medical groups are also discussed in an effort to provide options for alternative recommendations and services. The current paper is intended to facilitate comprehensive care for cardiac patients by providing clinicians with a review of the available intervention literature, as well as potential interventions that may serve as supplemental strategies in the interim.

Neurodevelopmental outcomes of children with congenital heart disease: A review

Congenital heart defects are the most common birth anomaly affecting approximately 1% of births. With improved survival in this population, there is enhanced ability to assess long-term morbidities including neurodevelopment. There is a wide range of congenital heart defects, from those with minimal physiologic consequence that do not require medical or surgical intervention, to complex structural anomalies requiring highly specialized medical management and intricate surgical repair or palliation. The impact of congenital heart disease on neurodevelopment is multifactorial. Susceptibility for adverse neurodevelopment increases with advancing severity of the defect with initial risk factors originating during gestation. Complex structural heart anomalies may pre-dispose the fetus to abnormal circulatory patterns in utero that ultimately impact delivery of oxygen rich blood to the fetal brain. Thus, the brain of a neonate born with complex congenital heart disease may be particularly vulnerable from the outset. That vulnerability is compounded during the newborn period and through childhood, as this population endures a myriad of medical and surgical interventions. For each individual patient, these factors are likely cumulative and synergistic with progression from fetal life through childhood. This review discusses the spectrum of risk factors that may impact neurodevelopment in children with congenital heart disease, describes current recommendations and practices for neurodevelopmental follow-up of children with congenital heart disease and reviews important neurodevelopmental trends in this high risk population.

Neuropsychological Impairment in Children With Class 1 Congenital Heart Disease

Children with congenital heart disease (CHD) are at increased risk of neuropsychological impairments, but few studies are available on the nonlinguistic neuropsychological abilities of children with CHD. We conducted neuropsychological evaluations using the NEPSY II on a cohort of 17 school-age Italian children with diagnoses of Class 1 CHD, no genetic or chromosomal abnormalities, and normal intelligence scores, and we compared them with 34 matched controls. Children with CHD in this study had undergone at least one cardiac surgery with cardiopulmonary bypass support. We found that children with CHD scored significantly lower than their matched controls on memory and learning domain tasks, and they displayed subtle attention/executive dysfunctions and deficits in sensorimotor skills.

Neurocognition and adaptive functioning in a genetic high risk model of schizophrenia

BACKGROUND

Identifying factors that influence the functional outcome is an important goal in schizophrenia research. The 22q11.2 deletion syndrome (22q11DS) is a unique genetic model with high risk (20-25%) for schizophrenia. This study aimed to identify potentially targetable domains of neurocognitive functioning associated with functional outcome in adults with 22q11DS.

METHODS

We used comprehensive neurocognitive test data available for 99 adults with 22q11DS (n = 43 with schizophrenia) and principal component analysis to derive four domains of neurocognition (Verbal Memory, Visual and Logical Memory, Motor Performance, and Executive Performance). We then investigated the association of these neurocognitive domains with adaptive functioning using Vineland Adaptive Behavior Scales data and a linear regression model that accounted for the effects of schizophrenia status and overall intellectual level.

RESULTS

The regression model explained 46.8% of the variance in functional outcome (p &lt; 0.0001). Executive Performance was significantly associated with functional outcome (p = 0.048). Age and schizophrenia were also significant factors. The effects of Executive Performance on functioning did not significantly differ between those with and without psychotic illness.

CONCLUSION

The findings provide the impetus for further studies to examine the potential of directed (early) interventions targeting Executive Performance to improve long-term adaptive functional outcome in individuals with, or at high risk for, schizophrenia. Moreover, the neurocognitive test profiles may benefit caregivers and clinicians by providing insight into the relative strengths and weaknesses of individuals with 22q11DS, with and without psychotic illness.

An integrated in utero MR method for assessing structural brain abnormalities and measuring intracranial volumes in fetuses with congenital heart disease: results of a prospective case-control feasibility study

Purpose

To refine methods that assess structural brain abnormalities and calculate intracranial volumes in fetuses with congenital heart diseases (CHD) using in utero MR (iuMR) imaging. Our secondary objective was to assess the prevalence of brain abnormalities in this high-risk cohort and compare the brain volumes with normative values.

Methods

We performed iuMR on 16 pregnant women carrying a fetus with CHD and gestational age ≥ 28-week gestation and no brain abnormality on ultrasonography. All cases had fetal echocardiography by a pediatric cardiologist. Structural brain abnormalities on iuMR were recorded. Intracranial volumes were made from 3D FIESTA acquisitions following manual segmentation and the use of 3D Slicer software and were compared with normal fetuses. Z scores were calculated, and regression analyses were performed to look for differences between the normal and CHD fetuses.

Results

Successful 2D and 3D volume imaging was obtained in all 16 cases within a 30-min scan. Despite normal ultrasonography, 5/16 fetuses (31%) had structural brain abnormalities detected by iuMR (3 with ventriculomegaly, 2 with vermian hypoplasia). Brain volume, extra-axial volume, and total intracranial volume were statistically significantly reduced, while ventricular volumes were increased in the CHD cohort.

Conclusion

We have shown that it is possible to perform detailed 2D and 3D studies using iuMR that allow thorough investigation of all intracranial compartments in fetuses with CHD in a clinically appropriate scan time. Those fetuses have a high risk of structural brain abnormalities and smaller brain volumes even when brain ultrasonography is normal.

Prognosis of severe congenital heart diseases: Do we overestimate the impact of prenatal diagnosis?

BACKGROUND

Prenatal diagnosis of congenital heart disease (CHD) is controversial because of unclear benefits in terms of morbidity and mortality, and issues with healthcare costs and organization.

AIM

To compare, in children with severe CHD, 1-year morbidity and mortality between prenatal and postnatal diagnosis groups.

METHODS

All pregnancies and children aged<1 year with a diagnosis of severe CHD were collected over a 5-year period from our database. Severe CHDs were defined as lethal cases, cases leading to medical termination of pregnancy, or children requiring surgery and/or interventional catheterization and/or hospitalization during their first year of life. The primary endpoint was 1-year mortality rate among live births.

RESULTS

Overall, 322 cases of severe CHD were identified; 200 had a prenatal diagnosis and there were 97 terminations of pregnancy. Of the 225 live births, 34 died before the age of 1 year. The 1-year mortality rate was not significantly different between prenatal and postnatal groups (16.7% vs. 13.9%; p=0.13). In the prenatal group, prostaglandin use was more important and precocious, duration of hospitalization stay was longer, extracardiac complications were less common and cardiac surgery was performed more frequently and later. An association with chromosomal or syndromic anomalies was a risk factor for 1-year mortality.

CONCLUSIONS

Prenatal diagnosis of severe CHD had an impact on the decision regarding termination of pregnancy, but not on the 1-year prognosis among live births. We should now use large multicentre CHD registries to determine the impact of prenatal diagnosis on postnatal management, neurological prognosis and quality of life.

Fetal and neonatal neuroimaging

Magnetic resonance imaging (MRI) can provide detail of the soft tissues of the fetal and neonatal brain that cannot be obtained by any other imaging modality. Conventional T1 and T2 weighted sequences provide anatomic detail of the normally developing brain and can demonstrate lesions, including those associated with preterm birth, hypoxic ischemic encephalopathy, perinatal arterial stroke, infections, and congenital malformations. Specialized imaging techniques can be used to assess cerebral vasculature (magnetic resonance angiography and venography), cerebral metabolism (magnetic resonance spectroscopy), cerebral perfusion (arterial spin labeling), and function (functional MRI). A wealth of quantitative tools, most of which were originally developed for the adult brain, can be applied to study the developing brain in utero and postnatally including measures of tissue microstructure obtained from diffusion MRI, morphometric studies to measure whole brain and regional tissue volumes, and automated approaches to study cortical folding. In this chapter, we aim to describe different imaging approaches for the fetal and neonatal brain, and to discuss their use in a range of clinical applications.

The Association Between the Functional Status Scale and the Pediatric Functional Independence Measure in Children Who Survive Traumatic Brain Injury

OBJECTIVES

To determine the association between the Functional Status Scale and Pediatric Functional Independence Measure scores during the rehabilitation stay in children who survive traumatic brain injury.

DESIGN

Secondary analysis of a prospective observational cohort study.

SETTING

Tertiary care children's hospital with a level 1 trauma center and inpatient rehabilitation service.

PATIENTS

Sixty-five children less than 18 years old admitted to an ICU with acute traumatic brain injury and subsequently transferred to the inpatient rehabilitation service.

INTERVENTIONS

Not applicable.

MEASUREMENTS AND MAIN RESULTS

Functional Status Scale and Pediatric Functional Independence Measure at transfer to rehabilitation and Pediatric Functional Independence Measure at discharge from rehabilitation. The median age of the cohort was 7.1 years (interquartile range, 0.8-12.3 yr), and 29% were female. Nearly all of the children were healthy prior to the traumatic brain injury: six patients (9.2%) had a baseline Functional Status Scale score greater than 6. At the time of transfer to inpatient rehabilitation, total Functional Status Scale and Pediatric Functional Independence Measure scores had the expected negative correlation due to increasing disability resulting in lower scores in Pediatric Functional Independence Measure and higher scores in Functional Status Scale (r = -0.49; 95% CI, -0.62 to -0.35). Among subjects with less disability as measured by lower total Functional Status Scale scores, we found substantial variability in the total Pediatric Functional Independence Measure scores. In contrast, Pediatric Functional Independence Measure scores were consistently low among subjects with a wide range of higher total Functional Status Scale scores (more disability).

CONCLUSIONS

Although proprietary and more time-intensive, the Pediatric Functional Independence Measure has advantages relative to the Functional Status Scale for less severely injured patients and task-specific measurements. The Functional Status Scale may have advantages relative to the Pediatric Functional Independence Measure for more severely injured patients. Further investigations are needed to characterize changes in the Functional Status Scale during the rehabilitation stay and after discharge.

Deterioration of functional abilities in children surviving the Fontan operation

Functional abilities are needed for activities of daily living. In general, these skills expand with age. We hypothesised that, in contrast to what is normally expected, children surviving the Fontan may have deterioration of functional abilities, and that peri-Fontan stroke is associated with this deterioration. All children registered in the Western Canadian Complex Pediatric Therapies Follow-up Program who survived a Fontan operation in the period 1999-2016 were eligible for inclusion. At the age of 2 years (pre-Fontan) and 4.5 years (post-Fontan), the Adaptive Behavior Assessment System-II general adaptive composite score was determined (population mean: 100, standard deviation: 15). Deterioration of functional abilities was defined as ⩾1 standard deviation decrease in pre- to post-Fontan scores. Perioperative strokes were identified through chart review. Multivariable logistic regression analysis determined predictors of deterioration of functional abilities. Of 133 children, with a mean age at Fontan of 3.3 years (standard deviation 0.8) and 65% male, the mean (standard deviation) general adaptive composite score was 90.6 (17.5) at 2 years and 88.3 (19.1) at 4.5 years. After Fontan, deterioration of functional abilities occurred in 34 (26%) children, with a mean decline of 21.8 (7.1) points. Evidence of peri-Fontan stroke was found in 10 (29%) children who had deterioration of functional abilities. Peri-Fontan stroke (odds ratio 5.00 (95% CI 1.74, 14.36)) and older age at Fontan (odds ratio 1.67 (95% CI 1.02, 2.73)) predicted functional deterioration. The trajectory of functional abilities should be assessed in this population, as more than 25% experience deterioration. Efforts to prevent peri-Fontan stroke, and to complete the Fontan operation at an earlier age, may lead to reduction of this deterioration.

Burden of caregiving after a child's in-hospital cardiac arrest

OBJECTIVE

To describe caregiver burden among those whose children survive in-hospital cardiac arrest and have high risk of neurologic disability, and explore factors associated with burden during the first year post-arrest.

METHODS

The study is a secondary analysis of the Therapeutic Hypothermia after Paediatric Cardiac Arrest In-Hospital (THAPCA-IH) trial. 329 children who had an in-hospital cardiac arrest, chest compressions for >2 min, and mechanical ventilation after return of circulation were recruited to THAPCA-IH. Of these, 155 survived to one year, and caregivers of 138 were assessed for burden. Caregiver burden was assessed at baseline, and 3 and 12 months post-arrest using the Infant Toddler Quality of Life Questionnaire for children <5 years old and the Child Health Questionnaire for children >5 years. Child functioning was assessed using the Vineland Adaptive Behaviour Scales Second Edition (VABS-II), the Paediatric Overall Performance Category (POPC) and Paediatric Cerebral Performance Category (PCPC) scales, and caregiver perception of global functioning.

RESULTS

Of 138 children, 77 (55.8%) were male, 77 (55.8%) were white, and 109 (79.0%) were <5 years old at the time of arrest. Caregiver burden was greater than reference norms at all time points. Worse POPC, PCPC and VABS-II scores at 3 months post-arrest were associated with greater caregiver burden at 12 months. Worse global functioning at 3 months was associated with greater burden at 12 months for children <5 years.

CONCLUSIONS

Caregiver burden is substantial during the first year after paediatric in-hospital cardiac arrest, and associated with the extent of the child's neurobehavioural dysfunction.

Functional Recovery in Critically Ill Children, the "WeeCover" Multicenter Study

OBJECTIVES

To evaluate functional outcomes and evaluate predictors of an unfavorable functional outcome in children following a critical illness.

DESIGN

Prospective observational longitudinal cohort study.

SETTING

Two tertiary care, Canadian PICUs: McMaster Children's Hospital and London Health Sciences.

PATIENTS

Children 12 months to 17 years old, admitted to PICU for at least 48 hours with one or more organ dysfunction, were eligible. Patients not expected to survive, direct transfers from neonatal ICU and patients in whom long-term follow-up would not be able to be conducted, were excluded.

INTERVENTIONS

None.

MEASUREMENTS AND MAIN RESULTS

The primary endpoint was functional outcome up to 6 months post PICU discharge, measured using the Pediatric Evaluation of Disabilities Inventory Computer Adaptive Test. Secondary outcomes included predictors of unfavorable functional outcome, caregiver stress, health-related quality-of-life, and clinical outcomes such as mortality, length of stay, and PICU-acquired complications. One hundred eighty-two patients were enrolled; 78 children (43.6%) had functional limitations at baseline and 143 (81.5%) experienced functional deterioration following critical illness. Ninety-two (67.1%) demonstrated some functional recovery by 6 months. Higher baseline function and a neurologic insult at PICU admission were the most significant predictors of functional deterioration. Higher baseline function and increasing age were associated with slower functional recovery. Different factors affect the domains of functioning differently. Preexisting comorbidities and iatrogenic PICU-acquired morbidities were associated with persistent requirement for caregiver support (responsibility function) at 6 months. The degree of functional deterioration after critical illness was a significant predictor of increased hospital length of stay.

CONCLUSIONS

This study provides new information regarding functional outcomes and the factors that influence meaningful aspects of functioning in critically ill children. Identifying patients at greatest risk and modifiable targets for improvement in PICU care guides us in developing strategies to improve functional outcomes and tailor to the rehabilitation needs of these patients and their families.

Significant motor improvement in an infant with congenital heart disease and a rolandic stroke: The impact of early intervention

OBJECTIVE

To report the impact of early motor intervention in an infant with congenital heart disease (CHD) and a stroke.

METHODS AND RESULTS

A 35-week newborn with a complex CHD and a normal MRI presented with early motor developmental delay at 2 months. She began an intervention program, which included biweekly motor developmental therapy with a physiotherapist, parental education, and daily home exercises. At 4 months, she underwent cardiac surgery. Following surgery, she was diagnosed with a stroke involving the right sylvian artery territory. She continued her intensive intervention program. The 12-month assessment revealed an evident gain of motor function. Despite MRI evidence of a chronic infarct involving the primary motor cortex, the child had normal motor functions.

CONCLUSION

This case report supports the positive impact of early intervention in infants with CHD and its potential effect on enhancing neuroplasticity, even in children with cerebro-vascular accidents involving areas of motor function.

Neonatal Surgery for Noncardiac Congenital Anomalies: Neonates at Risk of Brain Injury

OBJECTIVE

To evaluate the incidence of brain injury after neonatal surgery for noncardiac congenital anomalies using magnetic resonance imaging (MRI).

STUDY DESIGN

An MRI was obtained in 101 infants at 7 days [range: 1-115] after neonatal surgery for major noncardiac congenital anomalies. Brain injury was assessed using T1, T2, diffusion weighted imaging, and susceptibility-weighted imaging.

RESULTS

Thirty-two preterm infants (<37 weeks of gestation) and 69 full-term infants were included. MRI abnormalities were found in 24 (75%) preterm and 40 (58%) full-term infants. Parenchymal lesions were noted in 23 preterm (72%) and 29 full-term infants (42%). These consisted of punctate white matter lesions (n = 45), punctate cerebellar lesions (n = 17), thalamic infarction (n = 5), and periventricular hemorrhagic infarction (n = 4). Nonparenchymal abnormalities were found in 9 (28%) preterm and 26 (38%) full-term infants. These included supra- and infratentorial subdural hemorrhages (n = 30), intraventricular hemorrhage grade II (n = 7), and asymptomatic sinovenous thrombosis (n = 1). A combination of parenchymal lesions was present in 21 infants. Of infants who had an MRI within 10 days after surgery, punctate white matter lesions were visible on diffusion weighted imaging in 22 (61%), suggestive of recent ischemic origin. Type of congenital anomaly and prematurity were most predictive of brain injury.

CONCLUSIONS

Infants who have neonatal surgery for noncardiac congenital anomalies are at risk of brain injury, potentially accounting for the neurodevelopmental delay frequently observed in this population. Further research is warranted into potential mechanisms of brain injury and its timing of onset. Long-term neurodevelopmental follow-up is needed in this vulnerable population.

Epidemiology and Outcomes of Pediatric Multiple Organ Dysfunction Syndrome

OBJECTIVE

To summarize the epidemiology and outcomes of children with multiple organ dysfunction syndrome as part of the Eunice Kennedy Shriver National Institute of Child Health and Human Development multiple organ dysfunction syndrome workshop (March 26-27, 2015).

DATA SOURCES

Literature review, research data, and expert opinion.

STUDY SELECTION

Not applicable.

DATA EXTRACTION

Moderated by an experienced expert from the field, issues relevant to the epidemiology and outcomes of children with multiple organ dysfunction syndrome were presented, discussed, and debated with a focus on identifying knowledge gaps and research priorities.

DATA SYNTHESIS

Summary of presentations and discussion supported and supplemented by the relevant literature.

CONCLUSIONS

A full understanding the epidemiology and outcome of multiple organ dysfunction syndrome in children is limited by inconsistent definitions and populations studied. Nonetheless, pediatric multiple organ dysfunction syndrome is common among PICU patients, occurring in up to 57% depending on the population studied; sepsis remains its leading cause. Pediatric multiple organ dysfunction syndrome leads to considerable short-term morbidity and mortality. Long-term outcomes of multiple organ dysfunction syndrome in children have not been well studied; however, studies of adults and children with other critical illnesses suggest that the risk of long-term adverse sequelae is high. Characterization of the long-term outcomes of pediatric multiple organ dysfunction syndrome is crucial to identify opportunities for improved treatment and recovery strategies that will improve the quality of life of critically ill children and their families. The workshop identified important knowledge gaps and research priorities intended to promote the development of standard definitions and the identification of modifiable factors related to its occurrence and outcome.

Functional, quality of life, and neurodevelopmental outcomes after congenital cardiac surgery

Throughout the past few decades, advances in cardiology, neonatal intensive care, and surgical techniques have resulted in a growing cohort of thriving school-aged children with previously lethal complex congenital heart diseases. While survival has increased, there remains significant morbidity following repair including neurodevelopmental sequelae. Compared to children with a structurally normal heart, these infants and children have a higher frequency of abnormalities in tone, feeding, and delayed developmental milestones, as well as challenges with speech and learning disabilities, while a higher proportion of adolescents suffer from problems with processing speed, executive function, and a unique set of medical hardships related to exercise intolerance and obesity, medication burden, and mental health comorbidities. Innovative perioperative techniques and early psychosocial intervention in these young survivors has shown that despite the obstacles, the majority of these children can grow to have fulfilling lives with intelligence and social skills in the normal range. Additionally, a comprehensive medical home aids in optimizing the quality of life for these children and their families.

Risk factors of sepsis after open congenital cardiac surgery in infants: a pilot study

Background: Postsurgical sepsis is one of the main causes of the high mortality and morbidity after open congenital heart surgery in infants.  This study aimed to evaluate the role of cardiopulmonary bypass duration, thymectomy, surgical complexity, and nutritional status on postsurgical sepsis after open congenital cardiac surgery in infants.Methods: A total of 40 patients <1 year of age with congenital heart disease, Aristotle Basic Score (ABS) ≥6 were followed for clinical and laboratory data before and after surgery until the occurrence of signs or symptoms of sepsis or until a maximum of 7 days after surgery. Bivariate analyses were performed. Variables with p≤0.200 were then included for logistic regression.Results: Duration of cardiopulmonary bypass ≥90 minutes was associated with 5.538 increased risk of postsurgical sepsis in comparison to those ≤90 minutes (80% vs 25%, RR=5.538, p=0.006). No association was observed between the incidence of postsurgical sepsis with poor nutritional status (86% vs 84%, RR=1.059, p=1.000), thymectomy (and 50% vs 76%, RR=0.481, p=0.157), and Aristotle Basic Score (p=0.870).Conclusion: Cardiopulmonary bypass time influences the incidence of sepsis infants undergoing open congenital cardiac surgery. Further studies are needed to elaborate a number of risk factors associated with the incidence of sepsis in this population.

Neurodevelopmental functioning in children being evaluated for heart transplant prior to 2 years of age

Cardiac defects represent the most common type of birth defect and children with these abnormalities are known to experience a variety of developmental and neuropsychological delays. Children receiving heart transplants may be at the highest risk for delays as they tend to represent the most severely ill patients with heart disease. This study investigates neurocognitive and adaptive functioning in 20 children under 2 years of age who were undergoing evaluation for heart transplant, comparing their performance to that of normative samples. The results indicate delays across various domains of neurocognition, including general cognitive, receptive language, expressive language, fine motor, and gross motor skills. In addition, adaptive and social-emotional functioning fell significantly below that of normative samples. No significant differences were found when comparing the test performance of patients with congenital heart defects (n = 12) to patients with cardiomyopathy (n = 8). Secondary analyses investigating the impact of genetic conditions, premature birth, and non-English language dominance showed minor changes in results across some domains, although this may have been due, at least in part, to decreased power to detect differences. Overall, this study's results support the need for early evaluation, intensive intervention (e.g., speech, occupational, and physical therapy), and continued monitoring of these patients' neurodevelopmental/neuropsychological functioning over time. Future research should examine longitudinal changes in development using both pre- and post-transplant data and should investigate the impact of early intervention.

Arterial ischemic stroke in children with cardiac disease

OBJECTIVE

To describe the spectrum of cardiac disorders, timing in relation to interventional procedures, and outcome in children with cardiac disease and arterial ischemic stroke (AIS).

METHODS

Children younger than 18 years with cardiac disease and radiologically confirmed AIS admitted to the Royal Children's Hospital Melbourne between 1993 and 2010 were retrospectively identified using ICD-9 and ICD-10 searches.

RESULTS

Seventy-six children with cardiac disease and radiologically confirmed AIS were identified with the median age at diagnosis of 5 months (interquartile range 0-58). Cardiac lesions included cyanotic congenital heart disease (CHD) in 42 (55%), acyanotic heart disease in 24 (29%), cardiomyopathies/myocarditis in 6 (8%), infective endocarditis in 3 (4%), and primary arrhythmias in 3 (4%). Stroke occurred following cardiac procedures in 52 patients (68%): 41 post cardiac surgery (4.6 strokes per 1,000 surgical procedures) and 11 post cardiac catheterization (1.7 strokes per 1,000 catheterizations). The median time from procedure to diagnosis of stroke was 3 days (interquartile range 2-7), with 68% (95% confidence interval 58%-79%) of strokes estimated to occur within the periprocedural period. Prevalence of periprocedural stroke varied by diagnostic category, but was most common in patients with cyanotic CHD undergoing palliative surgery (22/2,256, 1%) (p < 0.005). There were 3 AIS-related deaths, and 54 survivors (84%) had persisting neurologic deficits.

CONCLUSIONS

Infants with cyanotic CHD were most frequently affected by AIS during the periprocedural period. Prospective cohort studies are required to determine effective primary and secondary prevention strategies.

Stroke in children with cardiac disease: report from the International Pediatric Stroke Study Group Symposium

BACKGROUND

Cardiac disease is a leading cause of stroke in children, yet limited data support the current stroke prevention and treatment recommendations. A multidisciplinary panel of clinicians was convened in February 2014 by the International Pediatric Stroke Study group to identify knowledge gaps and prioritize clinical research efforts for children with cardiac disease and stroke.

RESULTS

Significant knowledge gaps exist, including a lack of data on stroke incidence, predictors, primary and secondary stroke prevention, hyperacute treatment, and outcome in children with cardiac disease. Commonly used diagnostic techniques including brain computed tomography and ultrasound have low rates of stroke detection, and diagnosis is frequently delayed. The challenges of research studies in this population include epidemiologic barriers to research such as small patient numbers, heterogeneity of cardiac disease, and coexistence of multiple risk factors. Based on stroke burden and study feasibility, studies involving mechanical circulatory support, single ventricle patients, early stroke detection strategies, and understanding secondary stroke risk factors and prevention are the highest research priorities over the next 5-10 years. The development of large-scale multicenter and multispecialty collaborative research is a critical next step. The designation of centers of expertise will assist in clinical care and research.

CONCLUSIONS

There is an urgent need for additional research to improve the quality of evidence in guideline recommendations for cardiogenic stroke in children. Although significant barriers to clinical research exist, multicenter and multispecialty collaboration is an important step toward advancing clinical care and research for children with cardiac disease and stroke.

Clinical examination and pulse oximetry as screening for congenital heart disease in low-risk newborn

OBJECTIVE

To assess sensitivity, specificity, positive predictive value and negative predictive value of the cardiovascular physical examination (CPE) and of pulse oximetry in screening for congenital heart diseases (CHD) in asymptomatic newborn when prenatal ultrasound evaluation is negative for structural cardiac abnormalities.

METHODS

In this observational cohort study, 5750 asymptomatic newborns, admitted to nursery in a period of 2 years, underwent to CPE and determination of arterial oxygen saturation by pulse oxymetry between 48th and 72nd h of life.

RESULTS

Two hundred and ninty-eight newborns presented a suspected CPE; in 70% of cases, we found a transitional alteration and in only 17% of cases, the echocardiography examination performed for suspected CPE were completely negative. Three newborns were positive to pulse oximetry screening test but negative at CPE. After discharge, one case of critical CHD was diagnosed.

CONCLUSIONS

An accurate CPE performed by trained and experienced pediatricians is indicative of important cardiac structural alteration in more than 25%. The association of CPE and pulse oximetry allows to further improve the diagnostic accuracy.

Assessing the generalisability of the pediatric cardiac quality of life inventory in the United Kingdom

PURPOSE

To demonstrate the generalisability of the Pediatric Cardiac Quality of Life Inventory in the United Kingdom.

METHODS

Children and adolescents with heart disease were recruited from three tertiary paediatric cardiac centres in the United Kingdom and completed the Pediatric Cardiac Quality of Life Inventory. Item response option variability, total and subscale scores, patterns of correlation, and internal consistency were compared between the three sites.

RESULTS

A total of 1537 participants--768 children/adolescents and 769 parents--were evaluated from the three sites. Patterns of item response option variability were similar and acceptable for all samples--child, adolescent, parent of child, and parent of adolescent. Internal consistency was high (0.82-0.96) for all samples from each site, and item-subscale, subscale-subscale, subscale-total, and item-total correlations were moderate to excellent for each centre. Comparisons of patterns of subscale and total score correlations between the three sites revealed no significant differences.

CONCLUSION

Scores on the Pediatric Cardiac Quality of Life Inventory are generalisable in the United Kingdom, supporting the use of this measure for multi-centre studies of health-related quality of life of children and adolescents with heart disease.

Brain injury and development in newborns with critical congenital heart disease

OBJECTIVE

To determine the relationship between radiologically identifiable brain injuries and delayed brain development as reflected by brain metabolic and microstructural integrity.

METHODS

Term newborns with congenital heart disease (CHD) (120 preoperatively and 104 postoperatively) were studied with MRI to determine brain injury severity (BIS), microstructure reflected by fractional anisotropy (FA) and average diffusivity (Dav), and metabolism reflected by N-acetylaspartate (NAA)/choline (Cho) and lactate/Cho. Brain development is characterized by increasing NAA/Cho and white matter FA, and by decreasing Dav and lactate/Cho.

RESULTS

Newly acquired brain injury was common (41% preoperative, 30% postoperative). Lower white matter FA (p = 0.005) and lower NAA/Cho (p = 0.01) were associated with increasing preoperative BIS. Higher neonatal illness severity scores (p = 0.03), lower preoperative oxygen saturation (p = 0.002), hypotension (p < 0.001), and septostomy (p = 0.002) were also predictive of higher preoperative BIS. Preoperative FA, Dav, and NAA/Cho did not predict new postoperative BIS. Increasing preoperative BIS predicted higher postoperative Dav (p = 0.002) and lactate/Cho (p = 0.008). Within the postoperative scan, new brain injuries were associated with lower white matter FA (p = 0.04). Postoperative BIS (new lesions) was associated with lower postoperative systolic (p = 0.03) and mean (p = 0.05) blood pressures.

CONCLUSIONS

Brain injuries in newborns with CHD are strongly related to abnormalities of brain microstructural and metabolic brain development, especially preoperatively. Both newly acquired preoperative and postoperative brain injuries are related to potentially modifiable clinical risk factors.

Design and rationale of safe pediatric euglycemia after cardiac surgery: a randomized controlled trial of tight glycemic control after pediatric cardiac surgery

OBJECTIVES

To describe the design of a clinical trial testing the hypothesis that children randomized to tight glycemic control with intensive insulin therapy after cardiac surgery will have improved clinical outcomes compared to children randomized to conventional blood glucose management.

DESIGN

Two-center, randomized controlled trial.

SETTING

Cardiac ICUs at two large academic pediatric centers.

PATIENTS

Children from birth to those aged 36 months recovering in the cardiac ICU after surgery with cardiopulmonary bypass.

INTERVENTIONS

Subjects in the tight glycemic control (intervention) group receive an intravenous insulin infusion titrated to achieve normoglycemia (target blood glucose range of 80-110 mg/dL; 4.4-6.1 mmol/L). The intervention begins at admission to the cardiac ICU from the operating room and terminates when the patient is ready for discharge from the ICU. Continuous glucose monitoring is performed during insulin infusion to minimize the risks of hypoglycemia. The standard care group has no target blood glucose range.

MEASUREMENTS AND MAIN RESULTS

The primary outcome is the development of any nosocomial infection (bloodstream, urinary tract, and surgical site infection or nosocomial pneumonia). Secondary outcomes include mortality, measures of cardiorespiratory function and recovery, laboratory indices of nutritional balance, immunologic, endocrinologic, and neurologic function, cardiac ICU and hospital length of stay, and neurodevelopmental outcome at 1 and 3 yrs of age. A total of 980 subjects will be enrolled (490 in each treatment arm) for sufficient power to show a 50% reduction in the prevalence of the primary outcome.

CONCLUSIONS

Pediatric cardiac surgery patients may recognize great benefit from tight glycemic control in the postoperative period, particularly with regard to reduction of nosocomial infections. The Safe Pediatric Euglycemia after Cardiac Surgery trial is designed to provide an unbiased answer to the question of whether this therapy is indeed beneficial and to define the associated risks of therapy.

Gender differences in the developmental outcomes of children with congenital cardiac defects

OBJECTIVE

This study compares the developmental and functional outcomes at school entry between boys and girls born with a congenital cardiac defect who required early surgical correction.

STUDY DESIGN

A prospective cohort of 94 children, including 49 percent boys, were followed up to 5 years of age and assessed for developmental progress. Developmental measures included Wechsler Preschool and Primary Scale of Intelligence - cognitive; Peabody Picture Vocabulary Test - receptive language; Peabody Developmental Motor Scale - motor; and Child Behaviour Checklist - behaviour. Measures of function included the Vineland Adaptive Behavior Scale and Functional Independence Measure for Children (WeeFIM).

RESULTS

The mean scores of the boys on the WeeFIM subscales, such as self-care, mobility, cognition, were significantly lower than that of the girls. There was a trend for a greater proportion of boys to have abnormalities on neurological examination (boys 37.5 percent abnormal, girls 19.5 percent abnormal). Verbal, performance, and full scale Intellectual Quotients were 5-7 points lower in boys but did not reach significance (full scale Intellectual Quotient: boys 87.7 plus or minus 22.2; girls 93.9 plus or minus 19.3). Boys were more likely to have fine motor delays (50 percent, 82.7 plus or minus 16.5) compared with girls (28.2 percent, 87.0 plus or minus 15.8). There were no gender differences in receptive language or behavioural difficulties.

CONCLUSIONS

Boys born with congenital heart disease requiring early surgical repair appear to be at enhanced risk for neuromotor impairments and activity limitations. Findings support gender differences in the pathogenesis of early brain injury following hypoxic-ischaemic insults. This has implications for neuroprotective strategies to prevent brain injury.

Results of genome-wide analyses on neurodevelopmental phenotypes at four-year follow-up following cardiac surgery in infancy

BACKGROUND

Adverse neurodevelopmental sequelae are reported among children who undergo early cardiac surgery to repair congenital heart defects (CHD). APOE genotype has previously been determined to contribute to the prediction of these outcomes. Understanding further genetic causes for the development of poor neurobehavioral outcomes should enhance patient risk stratification and improve both prevention and treatment strategies.

METHODS

We performed a prospective observational study of children who underwent cardiac surgery before six months of age; this included a neurodevelopmental evaluation between their fourth and fifth birthdays. Attention and behavioral skills were assessed through parental report utilizing the Attention Deficit-Hyperactivity Disorder-IV scale preschool edition (ADHD-IV), and Child Behavior Checklist (CBCL/1.5-5), respectively. Of the seven investigated, three neurodevelopmental phenotypes met genomic quality control criteria. Linear regression was performed to determine the effect of genome-wide genetic variation on these three neurodevelopmental measures in 316 subjects.

RESULTS

This genome-wide association study identified single nucleotide polymorphisms (SNPs) associated with three neurobehavioral phenotypes in the postoperative children ADHD-IV Impulsivity/Hyperactivity, CBCL/1.5-5 PDPs, and CBCL/1.5-5 Total Problems. The most predictive SNPs for each phenotype were: a LGALS8 intronic SNP, rs4659682, associated with ADHD-IV Impulsivity (P=1.03 × 10(-6)); a PCSK5 intronic SNP, rs2261722, associated with CBCL/1.5-5 PDPs (P=1.11 × 10(-6)); and an intergenic SNP, rs11617488, 50 kb from FGF9, associated with CBCL/1.5-5 Total Problems (P=3.47 × 10(-7)). 10 SNPs (3 for ADHD-IV Impulsivity, 5 for CBCL/1.5-5 PDPs, and 2 for CBCL/1.5-5 Total Problems) had p<10(-5).

CONCLUSIONS

No SNPs met genome-wide significance for our three neurobehavioral phenotypes; however, 10 SNPs reached a threshold for suggestive significance (p<10(-5)). Given the unique nature of this cohort, larger studies and/or replication are not possible. Studies to further investigate the mechanisms through which these newly identified genes may influence neurodevelopment dysfunction are warranted.

Delayed cortical development in fetuses with complex congenital heart disease

Neurologic impairment is a major complication of complex congenital heart disease (CHD). A growing body of evidence suggests that neurologic dysfunction may be present in a significant proportion of this high-risk population in the early newborn period prior to surgical interventions. We recently provided the first evidence that brain growth impairment in fetuses with complex CHD has its origins in utero. Here, we extend these observations by characterizing global and regional brain development in fetuses with hypoplastic left heart syndrome (HLHS), one of the most severe forms of CHD. Using advanced magnetic resonance imaging techniques, we compared in vivo brain growth in 18 fetuses with HLHS and 30 control fetuses from 25.4-37.0 weeks of gestation. Our findings demonstrate a progressive third trimester fall-off in cortical gray and white matter volumes (P < 0.001), and subcortical gray matter (P < 0.05) in fetuses with HLHS. Significant delays in cortical gyrification were also evident in HLHS fetuses (P < 0.001). In the HLHS fetus, local cortical folding delays were detected as early as 25 weeks in the frontal, parietal, calcarine, temporal, and collateral regions and appear to precede volumetric brain growth disturbances, which may be an early marker of elevated risk for third trimester brain growth failure.

Neurobehavioral assessment of children presenting diverse congenital cardiopathologies

Brain maturation in 1-36 month old children suffering from congenital cardiopathologies was assessed after a study of psychomotor development. The Rogers' test (Rogers et al., Developmental programming for infants and young children. Volume 2. Early intervention developmental profile, Revised edition, ESL/ELT Michigan, Ann Arbor, 1981) was applied to 65 children, of whom 21 presented with simple cardiopathologies (CpS) and 22 with complex cardiopathologies (CpC). All children were matched by age, sex and socioeconomic status to 22 healthy children in a control group (C). Mean differences between the three groups were established by applying the Kruskal-Wallis test, and mean differences between the C and CpS/CpC groups were determined using the Mann-Whitney test. The proportion of cases evaluated as "low" in each group was calculated by applying the Rogers' test, and a test of proportion differences was applied between the C and CpS/CpC groups. CpS children performed similarly to the C, whereas CpC children scored significantly lower than C children on all variables. It is highly likely that the suboptimal psychomotor performance observed in CpC children was due to compromised hemodynamics and related to subclinical immaturity of cerebral development.