Clinical Report: Relationship Between LVOT Gradient, LA Strain, and Cardiac Events in Children with HCM
Overview
This study investigates the relationship between exercise-induced left ventricular outflow tract (LVOT) gradients and left atrial (LA) strain in pediatric patients with hypertrophic cardiomyopathy (HCM). Findings suggest that both LVOT gradients and LA strain are significant predictors of adverse cardiac events in this population.
Background
Hypertrophic cardiomyopathy (HCM) is a prevalent congenital heart disease that can lead to serious cardiac events, particularly in children. Understanding the dynamics of LVOT obstruction and LA mechanics is crucial for risk stratification and management in pediatric patients. This study aims to fill the knowledge gap regarding the association of these parameters with cardiac outcomes in children with HCM.
Data Highlights
No numerical data available in the provided source material.
Key Findings
LVOT obstruction is defined as a gradient ≥ 30 mm Hg, which can lead to increased left atrial pressures.
LA strain is a novel method that quantifies atrial wall deformation and is reduced in patients with LVOT obstruction.
In adults, LVOT gradients correlate with heart failure development, but similar data in children is limited.
This study included pediatric patients with both sarcomeric and nonsarcomeric HCM, expanding the understanding of HCM across different etiologies.
Emerging evidence suggests that LA strain may independently predict adverse cardiac events in pediatric HCM patients.
Clinical Implications
Clinicians should consider both LVOT gradients and LA strain measurements when assessing pediatric patients with HCM for potential cardiac events. This dual approach may enhance risk stratification and inform management strategies.
Conclusion
The findings underscore the importance of evaluating both LVOT gradients and LA strain in children with HCM to better predict adverse cardiac events. Further research is warranted to establish standardized protocols for these assessments.
by Addison Gearhart, Sonia F. Epstein, Kimberlee Gauvreau, Alessandra Ferraro, Christina M. Mangano, Ingrid Roth, David Harrild, Steven D. Colan, Ming Hui Chen
