Ebstein's anomaly is often associated with which cardiac conduction abnormality?

Ebstein's anomaly is a congenital heart defect characterized by malformation of the tricuspid valve and its associated structures, leading to abnormal positioning of the valve leaflets. This defect can result in a range of complications, including conduction abnormalities.

Right bundle branch block (RBBB) is frequently observed in patients with Ebstein's anomaly due to the anatomical displacement of the conduction tissues and altered electrical pathways. Specifically, the distorted tricuspid valve can lead to stretching of the right-sided structures, potentially affecting the normal conduction system of the heart. RBBB is characterized by a delay or blockage in the electrical impulses traveling through the right bundle branch, which can be seen on an electrocardiogram (ECG).

The other options provided have various associations with cardiac conditions, but they are not specifically linked to Ebstein's anomaly as significantly as RBBB. For instance, bradycardia and first-degree heart block may occur in different contexts but are not particularly characteristic of this specific anomaly. Atrial fibrillation can be present in many heart conditions, especially when there is underlying structural heart disease, but its relationship with Ebstein's anomaly is less direct compared to RBBB.

Thus, the connection between Ebstein's anomaly and right bundle branch block is well