Our Research

With improvement in medical and surgical care, the number of adults with congenital heart disease (CHD) is soaring. Adults with CHD commonly have impairments in brain health. However, significant gaps in knowledge remain regarding the relevant types and prevalence of neurologic and psychiatric risk and their associated risk factors. We sought to review current evidence, identify gaps in knowledge, and develop key next steps to improve scientific understanding and clinical care. Three working groups-Genetics and Brain Health, Characterizing Neuropsychological and Psychological Outcomes, and Neuropsychological and Psychosocial Interventions-were composed of multidisciplinary experts in relevant clinical and research domains, as well as adults with CHD. Each group identified 5 key knowledge gaps and associated next investigations needed to address those gaps. For Genetics and Brain Health, 5 key knowledge gaps were identified: lack of a standardized neuroimaging protocol for adults with CHD, need to understand neuroradiological-pathological-neuropsychological correlates, role of gene-environment interactions, what can be learned from brain health risk models from other groups, and how existing multimodal approaches influence risk and neuroresilience. Adults with CHD can benefit from routine assessment of brain health, as well as increased clinical and basic research into the underlying factors that contribute to risk and neuroresilience for neurologic and psychiatric sequalae. Multidisciplinary collaborative efforts that incorporate adults with CHD across the research cycle are essential for all key next steps.

OBJECTIVE: Optimize use of rapid genomic sequencing (rGS) in a level IV NICU.

STUDY DESIGN: We designed interventions to improve patient identification, ordering processes, and provider education for rGS in our level IV NICU. We measured the percentage of infants eligible for rGS by internal criteria who had rGS sent, diagnostic yield of rGS (balancing measure), and days from genetics consult to rGS result (balancing measure).

RESULT: Our study included 560 infants undergoing genetics evaluation. The percentage of eligible infants who had rGS sent significantly increased from 37% pre-intervention (January 2019-March 2021) to 54% post-intervention (April 2021-September 2024) (p < 0.001). Diagnostic yield of rGS remained stable (32% vs 34%). Time from genetics consult to rGS result significantly decreased from median 32 to 27 days (p = 0.04).

CONCLUSION: Our quality improvement initiative increased rGS use with stable diagnostic yield and decreased time to rGS result for critically ill infants with suspected genetic disorders.

Congenital heart disease (CHD) is the most common major birth defect, affecting nearly 1% of live-born infants. There is a high prevalence of CHD among premature neonates, with prematurity and low birth weight compounding the risks associated with CHD and leading to increased morbidity and mortality. Despite advances in diagnosis, surgery, and intensive care, outcomes for preterm infants with CHD remain guarded, particularly in the earliest gestational age groups. These infants face heightened risks of neonatal decompensation, cardiac arrest, and early mortality, but also long-term complications including neurodevelopmental impairment. The interplay between maternal-fetal factors, perinatal environment, and the complex physiology of both prematurity and CHD underscores the need for multidisciplinary care. Prenatal diagnosis, careful delivery planning, specialized postnatal management, and tailored surgical timing are critical to optimizing outcomes. Neonatal and cardiac intensivists, cardiologists, surgeons, anesthesiologists, and allied professionals must collaborate closely to address diverse challenges including hemodynamic instability, respiratory support, nutrition, neuroprotection, and social disparities. This review synthesizes current evidence on the epidemiology, pathophysiology, and management of neonates with CHD with a focus on prematurity. We highlight evolving models of interdisciplinary care and outline priorities for research. A physiology-based, team-oriented approach is essential to improve both survival and long-term quality of life for this vulnerable population. What is Known: • CHD is the most common birth defect and a leading cause of neonatal morbidity and mortality. • Prematurity and low birthweight worsen outcomes, with complications and surgical risk inversely related to gestational age. What is New: • Pregnancies with CHD carry up to a threefold higher risk of preterm delivery. • Outcomes reflect maternal-fetal and neonatal factors, highlighting the need for tailored timing, evaluation, and surgical strategies, with a key role for multidisciplinary care.

BACKGROUND: Neural tube defects such as spina bifida (SB) are congenital anomalies associated with significant morbidity and mortality worldwide. Environmental factors, particularly folate, modify SB risk. Based on recurrence rates of SB within families, genetic risk also contributes to SB development. However, the effect of maternal folate intake on genetic risk for SB in Bangladesh has not been quantified.

METHODS: Genetic variants were imputed from array data of 112 infants with SB and 116 infants without SB. After quality filtering, genome-wide association was performed on 91 infants with SB and 97 without. Maternal folate intake and maternal nail arsenic concentration were included as covariates and interaction terms (SNP × Folate, SNP × Arsenic) along with maternal age, infant sex, and 10 principal components as covariates.

RESULTS: Two loci had variants nominally associated with SB: one within the coding region of WWOX, including rs7184417 (odds ratio [OR] = 6.20, p = 2.22E-06), and a second in the coding region of ISOC2 (rs4801638; OR = 0.24, p = 5.75E-06). With the gene-folate interaction, a locus in CNTN5 was associated with SB. After including the gene-arsenic interaction, the gene-folate interaction effect was nominally associated with a locus in CTNNA2.

CONCLUSIONS: Inclusion of maternal folate intake as a covariate and interaction term identified three genomic loci that could impact the risk for SB. A fourth locus was identified when maternal arsenic level was included. These nominal associations should be assessed in additional cohorts with larger sample sizes. Novel genes impacted by these loci may interact with previously reported genes for SB.

Umbilical arterial catheters (UAC) in neonates are used for blood pressure monitoring, blood sampling, administration of fluids, nutrition, and medications. As UAC applications evolve, enteral nutrition practices vary in neonates in the presence of a UAC. The theoretical concern for mesenteric ischemia when a UAC is in place led to early nil per os approaches, delaying the initiation of enteral nutrition. More contemporary practices have favored introducing enteral feeding in neonates with UACs. However, there remains a paucity of data to guide clinical practice approaches regarding enteral feeding in neonates with a UAC in place. In this perspective article, we examine the physiological effects of UACs and review existing literature on feeding practices in neonates with a UAC. We offer an approach to managing enteral feeding in neonates with a UAC, addressing the central question: Is routine feeding in neonates with a UAC in place justified in current clinical practice?