User:Mr. Ibrahem/Right bundle branch block

Right bundle branch block (RBBB) is a type of electrical conduction abnormality of the heart seen on the electrocardiogram (ECG). In and of itself, it results in no symptoms and generally results in no complications. It may be temporary or permanently present.

Causes include heart damage, such as a heart attack or myocarditis, increased right ventricular pressure, such as with pulmonary embolism or cor pulmonale, and rarely high blood potassium. Though some cases occurs without any specific cause. The underlying mechanism involves damage to the right bundle branch.

Diagnosis requires that the QRS complex is greater than 120 ms and an rsR' wave is present in lead V1 or V2. The T waves are generally flipped in V1 and V2. When the QRS duration is less than 120 ms, but the other criteria are present, it is called an incomplete RBBB. Its presence does not interfere with the diagnosis of a heart attack.

No specific treatment is generally required. In the setting of heart failure, cardiac resynchronization therapy may be indicated. RBBB is present in about 0.2% to 0.8% of ECGs. Up to 11% of people are affected by the age of 80.