Right bundle branch block happens less often from underlying heart disease.

An incomplete right bundle branch block is an interruption in the heart's electrical conduction system. Incomplete means it has not completely failed.

It depends on what has caused the bundle branch block. Some healthy people will exhibit a bundle branch block (usually right sided) when their heart beats very fast. This is caused by a rate related delay in the bundle branch on that side, wherein the cells of the conduction system do not repolarize fast enough to propagate the electrical activity. If the block is caused by damage to the conduction tissue, then the bundle branch block will most likely be permanent.

i dont have a clue

right bundle branch block