What does a bundle branch block mean?

As a medical professional with expertise in cardiology, I can explain that a Bundle Branch Block (BBB) refers to a disruption in the normal electrical conduction system of the heart. This system is responsible for coordinating the contractions of the heart's chambers to ensure efficient blood circulation. In a BBB, the electrical impulses that regulate the heartbeat are delayed or blocked in one of the bundle branches, which are the pathways that transmit these impulses from the upper chambers (atria) to the lower chambers (ventricles) of the heart. There are two main types of BBB: left bundle branch block (LBBB) and right bundle branch block (RBBB). The type of block indicates which side of the heart is affected. LBBB is generally considered more serious because it can be associated with more significant heart problems, such as coronary artery disease or cardiomyopathy. RBBB, on the other hand, is often less concerning and can sometimes be a normal finding in individuals without heart disease, particularly the elderly. Symptoms of BBB can vary. Some people may not experience any symptoms at all, while others might have a slow or irregular heartbeat, shortness of breath, fatigue, or chest pain. The treatment for BBB depends on the underlying cause. In some cases, no treatment is necessary, but if the BBB is due to a more serious heart condition, treatment may include medications, procedures, or even surgery.

Bundle branch block is a condition in which there's a delay or obstruction along the pathway that electrical impulses travel to make your heart beat. The delay or blockage may occur on the pathway that sends electrical impulses to the left or the right side of the bottom chambers (ventricles) of your heart.