Clinical Report: Association of Right Atrial and Atrialised RV Structures with Cardiac Output

Overview

This study evaluates the impact of right atrial and atrialised right ventricular structures on exercise-induced cardiac output in patients with Ebstein anomaly. The volume of the atrialised right ventricle significantly influences cardiac output during exercise.

Background

Ebstein anomaly is a rare congenital heart defect characterized by tricuspid valve displacement and right ventricular dysfunction, leading to reduced exercise tolerance. Understanding the mechanisms behind exercise limitations in these patients is important. This study focuses on the relationship between cardiac structures and exercise capacity in un-operated patients with Ebstein anomaly.

Data Highlights

No numerical data or trial data provided in the source material.

Key Findings

• The study included 13 un-operated patients with Ebstein anomaly.
• Cardiac output was evaluated at rest and during exercise using cardiac MRI.
• The volume of the atrialised right ventricle was found to significantly impact cardiac output during exercise.
• Tricuspid regurgitation severity was assessed and correlated with cardiac performance metrics.
• Exercise capacity was measured using cardiopulmonary exercise testing (CPET).

Clinical Implications

The findings highlight the importance of assessing right atrial and atrialised right ventricular structures in patients with Ebstein anomaly to understand their exercise limitations.

Conclusion

The study highlights the significant role of atrialised right ventricular volume in determining exercise-induced cardiac output in patients with Ebstein anomaly.

Related Resources & Content

1. Pediatric Cardiology, 2022 -- Thorough Assessment of Children with Ebstein Anomaly Necessitates Utilization of Echocardiography and Cardiac MRI
2. Frontiers in Cardiovascular Medicine, 2026 -- A comparison of the severity of tricuspid valve regurgitation between echocardiographic and cardiac magnetic resonance criteria in adults with congenital heart disease
3. Journal of Cardiac Failure, 2026 -- Right Ventricular Function and Echocardiographic Characteristics After Left Atrial-to-Coronary Sinus Shunting; Insights from ALT-FLOW Early Feasibility Study 3-Year Follow-Up
4. 2025 ACC/AHA/HRS/ISACHD/SCAI Guideline for the Management of Adults With Congenital Heart Disease
5. The American Association for Thoracic Surgery (AATS) 2025 Expert Consensus Document: Management of Ebstein anomaly in children and adults
6. Frontiers in Cardiovascular Medicine — Echocardiographic assessment of left atrial structure and function in severe aortic stenosis with preserved vs. reduced left ventricular ejection fraction
7. Cardiopulmonary Exercise Test Interpretation Across the Lifespan in Congenital Heart Disease
8. 2025 ACC/AHA/HRS/ISACHD/SCAI Guideline for the Management of Adults With Congenital Heart Disease: A Report of the American College of Cardiology/American Heart Association Joint Committee on Clinical Practice Guidelines | JACC
9. The American Association for Thoracic Surgery (AATS) 2025 Expert Consensus Document: Management of Ebstein anomaly in children and adults - PubMed
10. SCHD | Free Full-Text | Impaired Magnetic Resonance Myocardial Strain in Unoperated Ebstein’s Anomaly Is Associated with Reduced Exercise Capacity
11. Anatomical severity of Ebstein’s anomaly: a quantitative analysis based on cardiovascular MRI | Open Heart
12. Pre-operative CMR More Accurately Grades Tricuspid Regurgitation and Predicts Post-cone Operation Right Ventricular Function in Ebstein’s Anomaly - Journal of Cardiovascular Magnetic Resonance