Ebstein's anomaly is characterized by which type of displacement of the tricuspid valve?

Ebstein's anomaly is a rare congenital heart defect characterized primarily by the abnormal positioning of the tricuspid valve. In this condition, the tricuspid valve is typically displaced downward or inferiorly into the right ventricle. This abnormal positioning affects the valve's function and structure, leading to potential complications such as arrhythmias and heart failure.

The inferior displacement of the tricuspid valve in Ebstein's anomaly can result in a portion of the right ventricle being effectively incorporated into the right atrium, which can lead to volume overload in the right atrium and reduced function of the right ventricle. Understanding this inferior displacement is crucial for diagnosing and managing Ebstein’s anomaly, as it provides insight into the underlying structural abnormalities present in the heart.

The other types of displacement, such as superior, lateral, or medial, do not accurately reflect the pathology of Ebstein's anomaly, as the hallmark of this condition revolves around the inferior positioning of the tricuspid valve rather than any other directional displacement that would not align with the clinical presentation observed in patients.