King’s College London Study Links Congenital Heart Disease to ADHD and Social Challenges in Preschoolers

New research shows preschoolers with heart defects are at higher risk for ADHD. A stimulating home environment may protect against behavioral issues.

By: AXL Media

Published: Apr 22, 2026, 4:15 AM EDT

Source: Information for this report was sourced from Frontiers

The Neurodevelopmental Intersection of Cardiac Conditions

Congenital heart disease (CHD), a structural abnormality formed before birth, affects approximately 1% of newborns globally. While previous medical literature has established a link between CHD and autism traits in adolescents and young adults, new research from King’s College London has extended these findings to the preschool demographic. The study, led by Professor Chiara Nosarti, reveals that children between the ages of four and six who suffer from critical or serious heart lesions are more prone to behavioral disturbances. These findings suggest that the impact of heart defects transcends physical health, influencing the early development of executive function and social cognition before a child even enters primary school.

Comparative Analysis of Behavioral Profiles

The research team analyzed 56 children with CHD, including those with transposition of the great arteries and other lesions requiring surgery within their first year of life. This group was compared against a control cohort of 215 healthy children from the Developing Human Connectome Project. Using standardized assessment tools such as the Children’s Behavior Questionnaire and the Social Communication Questionnaire, the investigators measured comprehensive behavioral profiles. Even after adjusting for variables like sex, gestational age, and socioeconomic status, the children with CHD consistently showed higher scores for ADHD-related attention difficulties and diminished empathy markers compared to their healthy counterparts.

Social Cognition and Peer Relationship Barriers

A primary concern highlighted in the study is the increased difficulty children with CHD face regarding peer relationships. While the research did not explicitly define the biological cause, the authors noted that these social hurdles might be driven by a reduced capacity to recognize facial expressions or identify false beliefs in others. These deficits in social processing can lead to isolation during critical developmental years. Professor Nosarti noted that peer problems are often visible during the preschool years, suggesting that early interventions targeting social-emotional learning could be as vital as cardiac monitoring for these young patients.