Final answer:
An RBBB on an ECG is indicated by a widened QRS complex, an rSR' pattern in leads V1 and V2, and a broad S wave in lateral leads, among other features. These characteristics help to diagnose this specific form of heart conduction abnormality.
Step-by-step explanation:
The ECG pattern that identifies a Right Bundle Branch Block (RBBB) includes several characteristic findings. The presence of RBBB is indicated by a widened QRS complex that is usually longer than 120 milliseconds and shows a delay in the right ventricle's depolarization. This delay creates a distinctive pattern in the ECG, with a secondary R wave (R') or a slurred S wave in leads V1 and V2, known as an rSR' pattern, and a broad S wave in the lateral leads (I, aVL, V5, and V6). Moreover, there is usually a delay or disruption in the intrinsicoid deflection in leads V1 and V2. Also, the ST segment and T wave often show a discordant pattern opposite to the main QRS direction, which is a typical finding in bundle branch blocks.
Assessing an ECG for RBBB involves looking for these particular features and understanding that this electric conduction delay does not affect the P wave or the T wave directly, as these represent atrial depolarization and ventricular repolarization, respectively. However, the overall shape of the ECG abnormalities can help inform decisions regarding further clinical management.
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