Final answer:
Right bundle branch block (RBBB) is a heart condition characterized by delayed depolarization of the right ventricle due to a disturbance in the heart's electrical conduction system.
Step-by-step explanation:
Right bundle branch block (RBBB) is characterized by a delay in depolarization of the right ventricle. The condition involves a disturbance in the electrical conduction system of the heart, where the right bundle branch, part of the atrioventricular bundle, does not transmit electrical impulses as quickly as it normally should. Consequently, the ventricular depolarization in the right ventricle is delayed compared to the left ventricle. This can be observed on an electrocardiogram (ECG) as a widening of the QRS complex. Bundle branch blocks, including RBBB, are a type of heart block that affects the bundle branches which carry electrical signals to the ventricles.