What EKG findings are indicative of a right bundle branch block?

A right bundle branch block (RBBB) is characterized by a delay in the conduction of electrical impulses through the right bundle branch of the heart's conduction system. One of the hallmark findings on an electrocardiogram (ECG) in RBBB is a widened QRS complex. This widening occurs because the electrical impulse takes longer to travel through the right ventricle compared to the left.

Typically, a normal QRS duration is less than 0.10 seconds; in the case of RBBB, the QRS duration is often greater than 0.12 seconds. Additionally, you may observe a specific pattern in the leads V1 and V2, which typically show an RSR' pattern (a small upward deflection followed by a downward deflection and then another upward deflection) indicative of right ventricular conduction delay.

The other choices do not specifically relate to the findings associated with right bundle branch block. An inverted T wave can occur due to various conditions, such as ischemia or other types of conduction disturbances, but it is not a specific indicator of RBBB. Similarly, arrhythmias without a pulse and a short QT interval reflect different clinical situations and do not provide the characteristic evidence of RBBB. Thus, the presence