Neurocognitive consequences of surgically corrected congenital heart defects: A review

Language brain responses and neurodevelopmental outcome in preschoolers with congenital heart disease: A fNIRS study

Neurodevelopmental disabilities affect up to 50% of survivors of congenital heart disease (CHD). Language difficulties are frequently identified during preschool period and can lead to academic, social, behavioral, and emotional difficulties. Structural brain alterations are associated with poorer neurodevelopmental outcomes in patients with CHD during infancy, childhood, and adolescence. However, evidence is lacking about the functional brain activity in children with CHD and its relationship with neurodevelopment. This study therefore aimed to characterize brain responses during a passive story-listening task in 3-year-old children with CHD, and to investigate the relationship between functional brain patterns of language processing and neurodevelopmental outcomes. To do so, we assessed hemodynamic concentration changes, using functional near-infrared spectroscopy (fNIRS), and neurodevelopmental outcomes, using the Wechsler Preschool and Primary Scale of Intelligence - 4th Edition (WPPSI-IV), in children with CHD (n = 19) and healthy controls (n = 23). Compared to their healthy peers, children with CHD had significantly lower scores on the Verbal comprehension index (VCI), the Vocabulary acquisition index (VAI), the General ability index (GAI), and the Information and the Picture Naming subtests of the WPPSI-IV. During the passive story-listening task, healthy controls showed significant hemodynamic brain responses in the temporal and the temporal posterior regions, with stronger activation in the temporal posterior than in the temporal regions. In contrast, children with CHD showed reduced activation in the temporal posterior regions compared to controls, with no difference of activation between regions. Reduced brain responses in the temporal posterior regions were also correlated with lower neurodevelopmental outcomes in both groups. This is the first study that reveals reduced brain functional responses in preschoolers with CHD during a receptive language task. It also suggests that the temporal posterior activation could be a potential brain marker of cognitive development. These findings provide support for the feasibility of identifying brain correlates of neurodevelopmental vulnerabilities in children with CHD.

S100B in cardiac surgery brain monitoring: friend or foe?

Recent advances in perioperative management of adult and pediatric patients requiring open heart surgery (OHS) and cardiopulmonary bypass (CPB) for cardiac and/or congenital heart diseases repair allowed a significant reduction in the mortality rate. Conversely morbidity rate pattern has a flat trend. Perioperative period is crucial since OHS and CPB are widely accepted as a deliberate hypoxic-ischemic reperfusion damage representing the cost to pay at a time when standard of care monitoring procedures can be silent or unavailable. In this respect, the measurement of neuro-biomarkers (NB), able to detect at early stage perioperative brain damage could be especially useful. In the last decade, among a series of NB, S100B protein has been investigated. After the first promising results, supporting the usefulness of the protein as predictor of short/long term adverse neurological outcome, the protein has been progressively abandoned due to a series of limitations. In the present review we offer an up-dated overview of the main S100B pros and cons in the peri-operative monitoring of adult and pediatric patients.

Postoperative Cerebral Oxygen Saturation in Children After Congenital Cardiac Surgery and Long-Term Total Intelligence Quotient: A Prospective Observational Study

OBJECTIVES

During the early postoperative period, children with congenital heart disease can suffer from inadequate cerebral perfusion, with possible long-term neurocognitive consequences. Cerebral tissue oxygen saturation can be monitored noninvasively with near-infrared spectroscopy. In this prospective study, we hypothesized that reduced cerebral tissue oxygen saturation and increased intensity and duration of desaturation (defined as cerebral tissue oxygen saturation < 65%) during the early postoperative period, independently increase the probability of reduced total intelligence quotient, 2 years after admission to a PICU.

DESIGN

Single-center, prospective study, performed between 2012 and 2015.

SETTING

The PICU of the University Hospitals Leuven, Belgium.

PATIENTS

The study included pediatric patients after surgery for congenital heart disease admitted to the PICU.

INTERVENTIONS

None.

MEASUREMENTS AND MAIN RESULTS

Postoperative cerebral perfusion was characterized with the mean cerebral tissue oxygen saturation and dose of desaturation of the first 12 and 24 hours of cerebral tissue oxygen saturation monitoring. The independent association of postoperative mean cerebral tissue oxygen saturation and dose of desaturation with total intelligence quotient at 2-year follow-up was evaluated with a Bayesian linear regression model adjusted for known confounders. According to a noninformative prior, reduced mean cerebral tissue oxygen saturation during the first 12 hours of monitoring results in a loss of intelligence quotient points at 2 years, with a 90% probability (posterior β estimates [80% credible interval], 0.23 [0.04-0.41]). Similarly, increased dose of cerebral tissue oxygen saturation desaturation would result in a loss of intelligence quotient points at 2 years with a 90% probability (posterior β estimates [80% credible interval], -0.009 [-0.016 to -0.001]).

CONCLUSIONS

Increased dose of cerebral tissue oxygen saturation desaturation and reduced mean cerebral tissue oxygen saturation during the early postoperative period independently increase the probability of having a lower total intelligence quotient, 2 years after PICU admission.

Timing of umbilical cord clamping among infants with congenital heart disease

The optimal timing of clamping and cutting the umbilical cord at birth among infants with congenital heart disease (CHD) remains a subject of controversy and debate. The benefits of delayed umbilical cord clamping (DCC) among term infants without CHD are well described, but the evidence base for DCC among infants with CHD has not been characterized adequately. The goals of the present review are to: 1) compare outcomes of DCC versus early cord clamping (ECC) in term (≥37 weeks of gestation) infants; 2) discuss potential risk/benefit profiles in applying DCC among term infants with CHD; 3) use rigorous systematic review methodology to assess the quality and quantity of published reports on cord clamping practices among term infants with CHD; 4) identify needs and opportunities for future research and interdisciplinary collaboration. Our systematic review shows that previous trials have largely excluded infants with CHD. Therefore, the supposition that DCC is advantageous because it is associated with improved neurologic and hematologic outcome is untested in the CHD population. Given that CHD is markedly heterogeneous, to minimize unnecessary and potentially harmful cord clamping practices, identification of subgroups (single-ventricle, cyanotic lesions) most likely to benefit from optimal cord clamping practices is necessary to optimize risk/benefit profiles. The available evidence base suggests that contemporary, pragmatic, randomized controlled trials comparing DCC with ECC among infants with CHD are needed.

Motor Impairment in Children With Congenital Heart Defects: A Systematic Review

CONTEXT

With improvements in survival rates in newborns with congenital heart defects (CHDs), focus has now shifted toward enhancing neurodevelopmental outcomes across their life span.

OBJECTIVE

To systematically review the prevalence and extent of motor difficulties in infants, children, and adolescents with CHD requiring open-heart surgery.

DATA SOURCES

Data sources included Embase, Medline and the Cumulative Index to Nursing and Allied Health Literature.

STUDY SELECTION

Original studies published between 1997 and 2019 examining gross and/or fine motor skills in children born with a CHD requiring open-heart surgery were selected.

DATA EXTRACTION

The prevalence of motor impairments and mean scores on standardized motor assessments were extracted. Findings were grouped in 5 categories on the basis of the age of the children.

RESULTS

Forty-six original studies were included in this systematic review. The prevalence of mild to severe motor impairments (scores <-1 SD below normative data or controls) across childhood ranged from 12.3% to 68.6%, and prevalence ranged from 0% to 60.0% for severe motor impairments (<-2 SDs). Although our results suggest that the overall prevalence of motor impairments <-1 SD remains rather constant across childhood and adolescence, severe motor impairments (<-2 SDs) appear to be more prevalent in younger children.

LIMITATIONS

Variability in sampling and methodology between the reviewed studies is the most important limitation of this review.

CONCLUSIONS

The results of this review highlight that infants with CHD have an increased risk of motor impairments across infancy, childhood, and adolescence. These findings stress the importance of systematic screening or evaluation of motor skills across childhood and adolescence in children with CHD.

Neurodevelopmental outcome in hypoplastic left heart syndrome after hybrid procedure

BACKGROUND

Little is known about the mid-term outcome and brain development in patients following the hybrid approach for hypoplastic left heart syndrome (HLHS). This study investigates neurodevelopmental outcome, quality of life (QoL) and brain MRI findings in HLHS preschoolers treated with the hybrid approach.

METHODS

Twenty HLHS patients (60% males) have been examined after neonatal hybrid Stage I and comprehensive stage II operation at the Pediatric Heart Center Giessen, Germany, between 2012 and 2016. Patients were evaluated with the Bayley Scales of Infant and Toddler Development III (Bayley-III), neurological examination, the Preschool Children Quality of Life Questionnaire (TAPQOL) at age 26.5±3.6 months, and again at 39.7±3.9 months with the Pediatric Cardiac Quality of Life Inventory (PCQLI). Furthermore, brain volumetric measurements and conventional brain MRI findings (27.3±4.5 months) were analyzed and compared with six healthy controls (29.2±11.1 months, P=0.53). Children with verified genetic comorbidities were excluded.

RESULTS

Mean cognitive, language, and motor composite scores on the Bayley-III were not different from healthy norms (100±15), and were 101±9.3 (P=0.48), 100±13 (P=0.93), and 98±11.7 (P=0.45), respectively. Status post stroke was the most common brain MRI abnormality, and was found in 3/19 (16%) patients, most common affecting the middle cerebral artery territory. In comparison to controls, total white matter volumes were reduced (P=0.014), and cerebrospinal fluid (CSF) volumes were increased (P=0.042) in patients. Overall health-related QoL in 2 to 3 years aged children HLHS was good, but inferior scores in the motor subscale were noted compared to healthy norms (P=0.007). However, at 3 to 4 years, parents reported comparable QoL for their children in the PCQLI to children with biventricular heart lesion.

CONCLUSIONS

HLHS patients followed by hybrid approach without major complications show a favorable neurodevelopment at 2-3 years of age. Despite extensive health-related burden, the vast majority of Fontan preschoolers with HLHS showed a good health-related QoL. Nevertheless, comprehensive care and establishing routine follow-up examinations are important to recognize long-term challenges and further improve neurodevelopmental outcome of this high-risk patient population.

Child neurodevelopment and mental health after surgical ventricular septal defect repair: risk and protective factors

AIM

This case-control study examined the long-term consequences of surgical correction for ventricular septal defect (VSD; the most common congenital heart defect) in infancy. It assessed children who had undergone VSD surgery and the factors related to maternal conditions, surgery, and hospital stay.

METHOD

Thirty-nine children (23 females, 16 males; age range 6y 1mo-9y 7mo [mean 7y 4mo, SD 1y]) with repaired isolated, non-syndromic, non-genetic VSD were compared with 39 typically developing children (22 females, 17 males; age range 6y-9y 2mo [mean 7y 3mo, SD 10mo]). The children completed behavioural tests of neurodevelopment and a quality of life (QoL) questionnaire. Mothers rated children's emotional/behavioural symptoms and QoL. Measures of maternal parenting behaviour and psychopathology were treated as moderators.

RESULTS

Affected children showed reduced language skills (p=0.002) unless mothers reported high parenting behaviour subscale scores (p=0.04). Children's anxiety symptoms were elevated when mothers had anxiety symptoms (p=0.01). Longer hospital stay was associated with lower intelligence (p=0.003) and psychomotor scores (p=0.006). Longer scars predicted elevated child anxiety (p=0.008), and age at surgery and QoL were inversely related (p=0.01).

INTERPRETATION

Impairments could be mitigated if VSD repair was performed early in life with a relatively small scar and uncomplicated hospital stay. This outcome depends on maternal parenting behaviour and anxiety symptoms.

WHAT THIS PAPER ADDS

Children's cognitive and psychomotor development after surgical ventricular septal defect repair was unimpaired. Children showed no mental health restrictions when their mothers reported few anxiety symptoms themselves. Language impairments might be preventable by pro-active parenting. The outcome also depends on variables related to surgery and hospital stay.

Neurodevelopmental outcome of children with congenital heart disease

Congenital heart disease (CHD) constitutes the most common congenital malformation, with moderate or severe CHD occurring in around 6 in 1000 live births. Due to advances in medical care, survival rates have increased significantly. Thus, the majority of children with CHD survive until adolescence and adulthood. Children with CHD requiring cardiopulmonary bypass surgery are at risk for neurodevelopmental impairments in various domains, including mild impairments in cognitive and neuromotor functions, difficulties with social interaction, inattention, emotional symptoms, and impaired executive function. The prevalence for these impairments ranges from 20% to 60% depending on age and domain ("high prevalence-low severity"). Domains are often affected simultaneously, leading to school problems with the need for learning support and special interventions. The etiology of neurodevelopmental impairments is complex, consisting of a combination of delayed intrauterine brain development and newly occurring perioperative brain injuries. Mechanisms include altered intrauterine hemodynamic flow as well as neonatal hypoxia and reduced cerebral blood flow. The surgical procedure and postoperative phase add to this cascade of factors interfering with normal brain development. Early identification of children at high risk through structured follow-up programs is mandated to provide individually tailored early interventions and counseling to improve developmental health.

Neurocognitive profiles in adolescents and young adults with congenital heart disease

INTRODUCTION AND OBJECTIVES

The objectives of this study were to assess the neuropsychological performance (NP) of adolescents and young adults with congenital heart disease (CHD), comparing them with a group of healthy controls, to determine whether there are different neurocognitive phenotypes in CHD, and to identify their relation to sociodemographic, neonatal, clinical and psychological adjustment variables.

METHODS

A total of 217 CHD patients (116 male, aged 15.73±2.68 years) and 80 controls (35 male, age 16.76±2.22 years) underwent an extensive neuropsychological assessment and analysis of psychological adjustment.

RESULTS

CHD patients had significantly poorer NP than healthy controls in all neurocognitive domains. Three different phenotypes of NP in CHD patients were identified: non-impaired (NI), moderately impaired (MI) and globally impaired (GI). They differed in all dimensions of NP. The GI cluster showed fewer years of schooling (p=0.025) and lower neonatal indicators such as head circumference (p=0.019), 1-min Apgar score (p=0.006), birth weight (p=0.05) and length (p=0.034) than the NI cluster. In the MI and GI clusters, there were more cyanotic forms of disease, including tetralogy of Fallot and transposition of the great arteries. The GI cluster presented more difficulties with psychological adjustment, including social (p=0.038), attention (p=0.001) and aggressive (p=0.003) problems.

CONCLUSIONS

CHD patients have poorer NP than controls. NP in the CHD group can be classified in three clusters that reflect different levels of neuropsychological functioning, which is sensitive to social, neonatal and psychological adjustment variables.

Long-term early development research in congenital heart disease (LEADER-CHD): a study protocol for a prospective cohort observational study investigating the development of children after surgical correction for congenital heart defects during the first 3 years of life

INTRODUCTION

Congenital heart disease (CHD) is the most common birth defect. Studies on the development of children with CHD point towards deficits in motoric, cognitive and language development. However, most studies are cross-sectional and there is a gap in the knowledge concerning developmental trajectories, risk and protective factors and a lack of research concerning environmental predictors. Specifically, no studies have so far considered the importance of early caregiving experiences and child temperament for the development of children with CHD.

METHODS

In a single-centre prospective cohort study, cognitive, motoric and language development of 180 children after corrective surgery for a simple transposition of the great arteries (TGA), tetralogy of Fallot (TOF) or ventricular septal defect (VSD) will be assessed at ages 12, 24 and 36 months with the Bayley Scales of Infant Development 3rd Edition (BSID-III). At age 12 months, a free-play video observation will be conducted to investigate the relationship between primary caregiver and child, and child temperament will be assessed with the Infant Behavior Questionnaire-Revised Short Version. Medical information will be obtained from patient records and demographic information via questionnaires.

ANALYSIS

Frequency and severity of developmental delays will be reported descriptively. Differences between groups (TGA, TOF, VSD) will be subjected to repeated-measures analysis across time points. Multiple regressions will be applied for the analysis of predictors at each time point. For the analysis of differential developmental trajectories, mixed-model analysis will be applied.

ETHICS AND DISSEMINATION

The study has been approved by the local medical ethics committee. Written informed consent will be obtained from all participants. Parents have the option to be debriefed about BSID-III results after each assessment and about the study results after project completion. Results will be disseminated in peer-reviewed journals and presented at conferences.

TRIAL REGISTRATION NUMBER

DRKS00011006; Pre-results.

Neurodevelopmental Outcome and Health-related Quality of Life in Children With Single-ventricle Heart Disease Before Fontan Procedure

Neurodevelopmental impairment and impaired quality of life constitute a major source of morbidity among children with complex congenital heart disease, in particular for single-ventricle (SV) morphologies. Risk factors and quality of life determining clinical and neurodevelopmental outcome at 2 years of age are examined. In a 2-center cohort study, 48 patients with SV morphology (26 hypoplastic left heart syndrome and 22 other types of univentricular heart defect) have been examined before Fontan procedure between 2010 and 2015. Patients were assessed with the Bayley Scales of Infant and Toddler Development, Third Version (Bayley-III), and the Preschool Children Quality of Life (TAPQOL) questionnaire. A total of 44 patients underwent hybrid procedure (n = 25), Norwood procedure (n = 7), or shunt or banding procedure (n = 12) as first surgery before subsequent bidirectional cavopulmonary anastomosis (n = 48). Median cognitive, language, and motor composite scores on the Bayley-III were 100 (range 65-120), 97 (68-124), and 97 (55-124), respectively. The language composite score was significantly below the norm (P = 0.025). Risk factors for poorer neurodevelopmental outcome were prolonged mechanical ventilation, longer days of hospital stay, and more reinterventions (all P < 0.05). Parents reported a good quality of life for their children. Children undergoing Fontan procedure show a favorable development and good quality of life. More complicated postoperative course and reinterventions constitute risk factors for impaired neurodevelopment. Improving postoperative management and implementing routine follow-up assessments aremeasures to further improve the neurodevelopmental outcome of this high-risk patient population.

Congenital Heart Disease and Neurodevelopment: Clinical Manifestations, Genetics, Mechanisms, and Implications

Children with congenital heart disease (CHD) are at increased risk of neurodevelopmental disorders (NDDs) and psychiatric conditions. These include cognitive, adaptive, motor, speech, behavioural, and executive functioning deficits, as well as autism spectrum disorder and psychiatric conditions. Structural and functional neuroimaging have demonstrated brain abnormalities in young children with CHD before undergoing surgical repair, likely as a result of an in utero developmental insult. Surgical factors do not seem to play a significant role in neurodevelopmental outcomes. Specific genetic abnormalities, particularly copy number variants, have been increasingly implicated in both CHD and NDDs. Variations in genes involved in apolipoprotein E (APOE) production, the Wnt signalling pathway, and histone modification, as well as in the 1q21.1, 16p13.1-11, and 8p23.1 genetic loci, have been associated with CHD and NDDs and are important targets for future research. Understanding these associations is important for risk stratification, disease classification, improved screening, and pharmacologic management of individuals with CHD.

Educational and rehabilitation service utilization in adolescents born preterm or with a congenital heart defect and at high risk for disability

AIM

This historical cohort study describes the use of educational and rehabilitation services in adolescents born preterm or with a congenital heart defect (CHD).

METHOD

Parents of 76 young people (mean age 15y 8mo [SD 1y 8mo]) with CHD and 125 born ≤29 weeks gestational age (mean age 16y [SD 2y 5mo]) completed a demographics questionnaire including educational and rehabilitation resource utilization within the previous 6 months. Rehabilitation services included occupational therapy, physical therapy, speech language pathology, psychology. Developmental (Leiter Brief IQ, Movement-ABC, Strengths and Difficulties Questionnaire) and functional (Vineland) status of the young people was assessed. Pearson χ² tests were used to perform simple pairwise comparisons of categorical outcomes across the two groups (CHD, preterm). Univariate logistic regression was used to examine predictors of service utilization.

RESULTS

Developmental profiles of the two groups (CHD/preterm) were similar (29.9%/30% IQ<80; 43.5%/50.0% motor difficulties; 23.7%/22.9% behavior problems). One-third received educational supports or attended segregated schools. Only 16% (preterm) and 26.7% (CHD) were receiving rehabilitation services. Services were provided predominantly in the school setting, typically weekly. Few received occupational therapy or physical therapy (1.3-7.6%) despite functional limitations. Leiter Brief IQ<70 was associated with receiving educational supports (CHD: OR 5.53, 95% CI 1.29-23.68; preterm: OR 14.63, 3.10-69.08) and rehabilitation services (CHD: OR 4.46, 1.06-18.88; preterm: OR 5.11, 1.41-18.49). Young people with motor deficits were more likely to require educational (CHD: OR 5.72, 1.99-16.42; preterm: OR 3.11, 1.43-6.77) and rehabilitation services (preterm: OR 3.97, 1.21-13.03).

INTERPRETATION

Although young people with impairments were more likely to receive educational and rehabilitation services, many may not be adequately supported, particularly by rehabilitation specialists. Rehabilitation services at this important transition phase could be beneficial in optimizing adaptive functioning in the home, school, and community.

Visuospatial processing in adolescents with critical congenital heart disease: Organization, integration, and implications for academic achievement

Among the most significant factors affecting quality of life in individuals with critical congenital heart disease (CCHD) are neurodevelopmental challenges, including deficits in visuospatial processing and academic achievement. Few studies have compared outcomes across CCHD subgroups, despite their significant differences in anatomy/physiology and medical/surgical courses. This study compared visuospatial processing abilities using the Developmental Scoring System for the Rey-Osterrieth Complex Figure (DSS-ROCF) across groups of adolescents with CCHD (d-transposition of the great arteries [TGA, n = 139], Tetralogy of Fallot [TOF, n = 68], single-ventricle cardiac anatomy requiring the Fontan operation [SVF, n = 145]) and a group of healthy controls (CTR, n = 111), and examined the validity of visuospatial processing in predicting concurrent academic outcomes. The CCHD subgroups were found to differ in Organization, ps < .001, Structural Accuracy, ps < .001, and Incidental Elements Accuracy scores, ps ≤ .008; the post hoc analyses show that the SVF group tended to underperform compared to the other CCHD groups. With respect to academic skills, all CCHD groups scored lower than the CTR group, ps ≤ .007; however, the CCHD groups were not different from each other, ps > .23. The regression results showed that the DSS-ROCF Style rating (reflecting integration) accounted for a small yet statistically significant portion of unique variance in "assembled" academic outcomes, over and above the variance already accounted for by DSS-ROCF Organization, p < .01. These findings support the need for comprehensive neuropsychological assessment and monitoring of children and adolescents with CCHD, as well as targeted intervention for organization and integration deficits that may increase their risk for academic underachievement.

Neurodevelopmental Outcomes of the Child with Congenital Heart Disease

Survival after bypass surgery in moderate and severe congenital heart disease (CHD) has increased dramatically. Although cardiac outcome is often very good, these children are at increased risk of developmental impairments in all developmental domains. Risk factors for developmental impairment include a genetic disorder, preterm birth, longer intensive care stay, poorer socioeconomic environment, and more complex forms of CHD. Health care providers, patients, and parents must be aware and informed about noncardiac sequelae and tertiary centers performing open-heart surgery in neonates and infants must establish a neurodevelopmental follow-up program to provide regular neurodevelopmental assessments. These allow for individual counseling and early detection and treatment of developmental problems.

Long-Term Neurodevelopmental Outcomes in Children and Adolescents With Congenital Heart Disease

BACKGROUND

Effective medical and surgical management of pediatric congenital heart disease (CHD) to reduce long-term adverse neurodevelopmental outcomes is an important clinical objective in primary and specialty health care. We identify clinical predictors associated with an increased risk of 6 long-term neurodevelopmental outcomes in children with CHD compared to the general pediatric Medicaid population.

METHOD

South Carolina's retrospective, 15-year Medicaid data set (January 1, 1996-December 31, 2010) for 19,947 patients aged ≤ 17 years diagnosed with ≥ 1 CHD lesions (on the basis of International Classification of Diseases, Ninth Revision, Clinical Modification codes) were compared to 19,948 patients without CHD matched on age at entry into and duration in Medicaid using logistic and Cox proportional hazards regression.

RESULTS

The CHD cohort was significantly less likely to have incident neurologic or psychiatric disorders, mental retardation, developmental delays, or inattention/hyperactivity (adjusted odds ratios [ORs] = 0.34, 0.56, 0.03, 0.01, 0.004, respectively) but was more likely to have incident seizures (OR = 2.00) compared to controls. Exposure to both cardiac and noncardiac surgical intervention was associated with a significantly increased risk of developing neurologic or psychiatric disorders, mental retardation, developmental delays, or inattention/hyperactivity (cardiac ORs = 1.66, 2.00, 1.67, 1.43, 1.76, respectively) (noncardiac ORs = 2.25, 1.59, 1.48, 1.29, 1.36, 2.46, respectively). Any documented hypoxemia was associated with a significantly increased risk of developing 5 of the neurodevelopmental conditions (neurologic OR = 4.52, psychiatric OR = 1.60, mental retardation OR = 2.90, developmental delay OR = 2.12, seizures OR = 4.23).

CONCLUSION

Practitioners should maintain vigilant surveillance of all CHD patients, especially those exposed to surgical procedures or experiencing hypoxemia, to identify any neurodevelopmental issues early and address them promptly.

Neurocognition after paediatric heart surgery: a systematic review and meta-analysis

Children with congenital heart disease (CHD) often experience difficulties in academic and daily functioning, which have been associated with intelligence and neurocognitive skills, including executive functions (EFs), attention and memory. We report the neurocognitive data of children with CHD who were included in the Leuven glucose control trial (LGC trial). Through a systematic review and meta-analysis, we aimed to find which neurocognitive functions are most consistently and prominently affected. 365 children with CHD and 216 healthy control children underwent extensive neurocognitive testing in the LGC trial. A comprehensive search of electronic databases PubMed, EMBASE and Cochrane was conducted for studies measuring intelligence, EFs, attention and memory in children who underwent heart surgery for CHD. Standardised mean differences (SMDs) between the CHD group and a healthy control group were calculated for these neurocognitive functions. LGC trial data were included in the meta-analysis. Twelve studies with a healthy control group were included in the meta-analysis, involving 647 patients with CHD and 633 controls. The CHD group (median age 7.35 years at testing) had worse scores than healthy control children, for all investigated neurocognitive functions. A medium SMD was found for intelligence (SMD=−0.53 (95% CI −0.68 to −0.38), p<0.00001). Alertness, an attentional function, was also consistently poorer in the CHD group. Memory was less affected, while EF had a medium SMD with large heterogeneity. Children with CHD risk displayed lower performance on intelligence and alertness assessment, which may contribute to difficulties in daily life and school. Heterogeneity in neurocognitive assessment and small sizes in most studies limit the interpretation.

Long-term psychosocial outcome of adults with tetralogy of Fallot and transposition of the great arteries: a historical comparison

OBJECTIVE

To make a historical comparison on the long-term psychosocial outcome of cardiothoracic surgery during childhood.

METHODS

Adult patients operated for tetralogy of Fallot or transposition of the great arteries between 1980 and 1990 (recent sample) were compared with patients who underwent surgery and were investigated 10 years earlier (historical sample). In addition, atrial switch and arterial switch patients within the recent sample were compared. Psychosocial functioning was measured using standardised, validated psychological questionnaires.

RESULTS

Although the recent sample of patients overall shows a favourable quality of life, impairments were found in income, living conditions, relationships, offspring, and occupational level. Compared with the historical sample, the recent sample showed no significant improvements on psychosocial functioning, except for a better educational level. The amount of educational problems, such as learning difficulties, was still high compared with normative data. Recently operated patients with transposition of the great arteries (arterial switch) scored significantly better on the Short Form-36 vitality scale (p = 0.02) compared with historical patients with transposition of the great arteries (atrial switch).

CONCLUSIONS

Despite improvements in medical treatment over the past few decades, hardly any change was found in the psychosocial outcome of the recent patient sample compared with the historical patient sample. In particular, the percentage of patients needing special education and showing learning problems remained high, whereas income was low compared with normative data.

What do we know about cognitive functioning in adult congenital heart disease?

With the advent of improved medical and surgical care in congenital heart disease, there has been an increase in the number of patients who survive into adulthood, giving rise to a new patient population 'Adults with congenital heart disease'. In the past, morbidity and mortality were the primary concerns for this group. However, with improvements in outcome attention has shifted to other factors such as psychosocial and cognitive functioning. This paper reviews the literature on the cognitive functioning in adult congenital heart disease patients. A total of five relevant articles were retrieved via electronic searches of six databases, including MEDLINE, EMBASE, CINAHL, AMED, PsychINFO, and PubMed. The results displayed a consensus on the presence of some cognitive difficulties in adult congenital heart disease patients. The aetiology of cognitive dysfunctions appears to be multifactorial. The literature is limited by the very small number of studies looking at adults with congenital heart disease, with the majority focusing on cognitive functioning among children with congenital heart disease. However, the presence of cognitive dysfunctions and the resulting impact on the patient's day to day lives warrant for a more detailed and prospective research to enhance the understanding of its aetiology and impact.

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.

Cognitive functioning of adults with Noonan syndrome: a case-control study

Noonan syndrome (NS) is a genetic disorder characterised by short stature, facial dysmorphia, congenital heart defects and mildly lowered intellectual abilities. Research has mainly focused on genetic and somatic aspects, while intellectual and cognitive functioning has been documented scarcely. Also, to date studies have been primarily performed in children. This is the first study in which functioning within the major cognitive domains is systematically evaluated in a group of adults with NS and compared with a control group. Extensive neuropsychological assessment, including the domains intelligence, speed of information processing, memory (working memory, immediate recall and delayed recall), executive function and visuoconstruction, was performed in a sample of 42 patients with NS and 42 healthy controls, matched on age, sex and education level. In addition, subjective cognitive complaints were assessed with self-report questionnaires. On the domain speed of information processing patients performed worse than controls (P < 0.05). Furthermore, except for slightly better results on delayed recall in the patients with NS (P < 0.05), none of the other cognitive domains showed between-group differences. On the questionnaires, patients reported substantially more complaints about their own cognitive abilities than controls (P < 0.05). A lowered speed of information processing and relatively intact functioning in other cognitive domains characterises the cognitive profile of adult patients, in contrast to previous findings in children with NS, who seem to have more generalised cognitive deficits.

Occurrence and predictors of developmental impairments in 3-year-old children with congenital heart defects

OBJECTIVE

To examine the occurrence of developmental impairments in 3-year-old children with varying severity of congenital heart defects (CHD) and to identify predictors associated with developmental impairment in children with severe CHD.

METHODS

Prospective data collected at birth, 6, 18, and 36 months from the Norwegian Mother and Child Cohort Study (MoBa), conducted by the Norwegian Institute of Public Health, were linked with a nationwide medical CHD registry, and 175 three year olds with CHD in a cohort of 44,044 children were identified. Children with mild/moderate (n = 115) and severe (n = 60) CHD were compared with children without CHD (43,929) on motor, communication, and social impairments as reported by mothers in Norwegian Mother and Child Cohort Study questionnaires. Predictors of developmental impairment were analyzed for the group with severe CHD.

RESULTS

Children with severe CHD had >3 times higher odds of communication and gross motor impairments compared with controls, and had 2 times higher odds of any developmental impairment compared with controls. Children with mild and moderate CHD had >2 times higher odds of gross motor impairment but did not otherwise differ from controls. Predictors of impairment identified were previous developmental impairments and smaller head circumference at birth.

CONCLUSION

Children with severe CHD have increased odds of developmental impairments at age 3 years. Early developmental impairments are associated with later developmental impairments, suggesting lasting impairments and not merely temporary delay. Patient-specific conditions at birth should be considered and motor and communication support provided to potentially improve outcomes in children with CHD.

The registry and follow-up of complex pediatric therapies program of Western Canada: a mechanism for service, audit, and research after life-saving therapies for young children

Newly emerging health technologies are being developed to care for children with complex cardiac defects. Neurodevelopmental and childhood school-related outcomes are of great interest to parents of children receiving this care, care providers, and healthcare administrators. Since the 1970s, neonatal follow-up clinics have provided service, audit, and research for preterm infants as care for these at-risk children evolved. We have chosen to present for this issue the mechanism for longitudinal follow-up of survivors that we have developed for western Canada patterned after neonatal follow-up. Our program provides registration for young children receiving complex cardiac surgery, heart transplantation, ventricular assist device support, and extracorporeal life support among others. The program includes multidisciplinary assessments with appropriate neurodevelopmental intervention, active quality improvement evaluations, and outcomes research. Through this mechanism, consistently high (96%) follow-up over two years is maintained.

Symptoms of communication and social impairment in toddlers with congenital heart defects

BACKGROUND

With the advances in congenital cardiac surgery and medical management, mortality rates for congenital heart defects (CHD) have declined remarkably. As the number of CHD survivors have increased there is a growing focus on developmental morbidity. The objective of the current study is to compare symptoms of communication and social impairment in 18-month-old children with different severity of CHD with those of controls.

METHOD

We linked prospective data from the Norwegian Mother and Child Cohort Study, conducted by the Norwegian Institute of Public Health, with a nationwide medical CHD registry and identified 198 18-month-olds with CHD in a cohort of 47,692. Three groups of CHD were distinguished: mild/moderate (n= 122), severe (n= 54) and CHD with comorbidity (n= 22). Mothers reported on the child's communication and social skills by completing items from the Ages and Stages Questionnaire as part of the Norwegian Mother and Child Cohort Study.

RESULTS

Children aged 18 months old with CHD differed significantly from controls in levels of symptoms of communication impairment (P≤ 0.0001) and social impairment (P≤ 0.0001). The largest differences were found in children with CHD and comorbidity. Children with severe CHD also showed higher levels of both symptoms of communication and social impairment. Children with mild/moderate CHD showed a small difference only in symptoms of communication impairment.

CONCLUSION

Children with severe CHD and CHD with comorbidity show more symptoms of communication and social impairment compared with a large cohort at the age of 18 months. It is important to broaden the scope of inquiry to involve communication and social developmental domains.

Executive function and theory of mind in school-aged children after neonatal corrective cardiac surgery for transposition of the great arteries

AIM

cardiac malformations resulting in cyanosis, such as transposition of the great arteries (TGA), have been associated with neurodevelopmental dysfunction. The purpose of this study was to assess, for the first time, theory of mind (ToM), which is a key component of social cognition and executive functions in school-aged children with TGA.

METHOD

twenty-one children (14 males, seven females; mean age 7y 4mo; SD 3mo) who underwent neonatal open-heart surgery for TGA using full-flow cardiopulmonary bypass were compared with 21 typically developing age-matched children (12 males, nine females; mean age 7y 6mo; SD 3.8mo) using different neuropsychological measures specifically designed to assess executive function (cognitive and response inhibition, verbal and spatial working memory, and planning). They were also given two ToM tasks (first- and second-order false belief understanding).

RESULTS

general IQ was within the normal range in both the TGA group and the comparison group (mean IQ 113 [SD 9.3] and 118 [SD 10.1] respectively), but performance on all executive functions and on ToM (first and second level) was significantly lower in the TGA group (p values of 0.02, 0.01, and 0.004 respectively). A discriminant multivariate analysis provided evidence for cognitive and behavioural inhibition as well as performance on false belief tasks as being the most important contributors to the differentiation between the groups (p=0.03).

INTERPRETATION

children with TGA demonstrate great difficulties in exerting cognitive and behavioural inhibition. They also present specific deficits in false belief understanding, which were related to immature executive abilities.

Cognitive function in congenital heart disease after cardiac surgery with extracorporeal circulation

BACKGROUND

Congenital heart disease (CHD) may cause deleterious effects on cognitive function in children. This study aimed to evaluate the changes of the cognitive and academic functioning in children aged less than 4 years with serious CHD following cardiac surgery with extracorporeal circulation (ECC).

METHODS

A total of 100 children, aged 0-4 years with cyanotic (35) and acyanotic (65) heart diseases who had undergone cardiac surgery with ECC, were subjected to neuropsychological and behavioral evaluation using the Gesell Developmental Schedule (GDS) before operation and at 1 week, and 1, 3 and 6 months after operation.

RESULTS

The GDS scores in the first postoperative week were significantly lower than those before operation, but the scores increased gradually (P<0.01). ECC affected the GDS scores after operation, with the cyanotic children being more significantly affected than the acyanotic children. The GDS scores were negatively correlated with the age at each time point. The GDS scores were significantly lower in the cyanotic children than in the acyanotic children at 1 and 3 months postoperatively (P<0.01), but there was no significant difference at 6 months (P<0.05).

CONCLUSIONS

After cardiac surgery with ECC, the younger the children who have cardiac surgery, the more significantly the GDS score increases. The ECC mainly affects the cognitive ability and academic performance in cyanotic children in one month postoperatively.

A systematic review of motor and cognitive outcomes after early surgery for congenital heart disease

CONTEXT

Brain injury is the most common long-term complication of congenital heart disease requiring surgery during infancy. It is clear that the youngest patients undergoing cardiac surgery, primarily neonates and young infants, are at the greatest risk for brain injury. Developmental anomalies sustained early in life have lifelong repercussions.

OBJECTIVE

We conducted a systematic review to examine longitudinal studies of cognitive and/or motor outcome after cardiac surgery during early infancy.

METHODS

Electronic searches were performed in Medline, the Cumulative Index to Nursing and Allied Health Literature (Cinahl), and Embase (1998-2008). The search strategy yielded 327 articles, of which 65 were reviewed. Eight cohorts provided prospective data regarding the cognitive and/or motor outcome of infants who had undergone surgery for congenital heart disease before 6 months of age. Two authors, Ms Snookes and Dr Gunn, independently extracted data and presented results according to 3 subgroups for age of follow-up: early development (1 to <3 years); preschool age (3-5 years); and school age (>5 to 17 years). Weighted analysis was undertaken to pool the results of studies when appropriate.

RESULTS

All of the identified studies reported results of the Bayley Scales of Infant Development for children younger than the age of 3. Outcome data as reported by the Bayley Scales were combined for infants assessed at 1 year of age, revealing a weighted mean Mental Development Index of 90.3 (95% confidence interval: 88.9-91.6) and Psychomotor Development Index of 78.1 (95% confidence interval: 76.4-79.7). Additional analysis was limited by a lack of data at preschool and school age.

CONCLUSIONS

With this review we identified a limited number of prospective studies that systematically addressed outcome in patients at the highest risk. These studies consistently revealed cognitive and motor delay in children after cardiac surgery during early infancy. Additional investigation is required to ascertain the consequences of such impairment during later childhood and into adult life.

Motor and social development in 6-month-old children with congenital heart defects

OBJECTIVE

To assess whether the development of children with varying severity of congenital heart defect (CHD) differs from that of children without CHD at age 6 months.

STUDY DESIGN

A total of 236 children with CHD were compared with 61 032 children from the Norwegian Mother and Child Cohort Study conducted by the Norwegian Institute of Public Health. Diagnostic and treatment information was retrieved from a nationwide CHD registry. Four groups of CHD were distinguished: mild (n = 92), moderate (n = 50), severe (n = 70), and CHD with comorbidity (n = 24). At child age 6 months, the children's mothers reported on motor and social development by using the Mother and Child Questionnaire.

RESULTS

After adjusting for confounders (ie, birth weight), severe CHD increased the odds of gross motor impairment (odds ratio [OR], 3.78; 95% CI, 1.97-7.25) and fine motor impairment (OR, 2.04; 95% CI, 0.96-4.33). CHD with co-morbidity (eg, intestinal malformations) increased the odds of gross motor impairment (OR, 3.00; 95% CI, 0.95-9.51), fine motor impairment (OR, 5.47; 95% CI, 2.03-14.74), and social impairment (OR, 3.43; 95% CI, 1.40-8.41).

CONCLUSION

Increased odds of motor impairment are present already in infancy in severe CHD and CHD with comorbidity. CHD with comorbidity increases the odds of social impairment.

A controlled trial of early interventions to promote maternal adjustment and development in infants born with severe congenital heart disease

Abstract Background Congenital heart disease can have a negative impact on both infant development and maternal adjustment. This study considered the impact of a new programme of early psychosocial interventions on such outcomes, following the birth of a child with severe congenital heart disease. Methods Seventy infants and their mothers were assigned to an intervention or control group based on order of presentation to the unit. Interventions aimed at bolstering mother-infant transactions, through psychoeducation, parent skills training and narrative therapy techniques were implemented. Results Clinically and statistically significant gains were observed at 6-month follow-up on the mental (but not the psychomotor) scale of the Bayleys-II. Positive gains were also manifested on feeding practices, maternal anxiety, worry and appraisal of their situation. Conclusions A programme of generalizable psychosocial interventions is shown to have a positive impact on the infant with severe congenital heart disease and the mother.

Neuropsychological performance in school-aged children with surgically corrected congenital heart disease

OBJECTIVE

As surgical management of children with congenital heart disease (CHD) advanced, developmental outcome became the main focus of contemporary research. In this study, we specify the cognitive profile of children with CHD, 6 to 12 years postoperatively.

STUDY DESIGN

Patients with CHD (n = 43, mean age 8 years, 8 months) and healthy controls (n = 43, mean age 8 years, 11 months), were examined with an abbreviated intelligence scale (Wechsler Intelligence Scale for Children-3rd edition, Dutch version) and a developmental neuropsychological assessment battery (NEPSY [a developmental NEuroPSYchological assessment]).

RESULTS

We identified significantly lower scores for the CHD group on Estimated Full Scale IQ (P < .01). Neuropsychological assessment revealed lower scores for the CHD group on the cognitive domains of Sensorimotor Functioning (P < .001), Language (P < .001), Attention and Executive Functioning (P < .05), and Memory (P < .05). Children with CHD displayed more impulsive test behavior than healthy peers. No differences on IQ or cognitive domains were found between the cyanotic and the acyanotic CHD group.

CONCLUSIONS

Six to 12 years postoperatively, children with CHD display a neuropsychological profile with mainly mild motor deficits and subtle difficulties with language tasks. Attention/executive functioning and memory also appear involved but to a lesser degree. Long-term follow-up of children with surgically corrected CHD, even when hemodynamically successful, is warranted, as they are at risk for neurodevelopmental delay at school age.