Left bundle branch block (LBBB) is an abnormality of the electrical conduction of the heart. There are two main conducting pathways in the heart, the left and the right bundle. In LBBB, the left conducting pathway no longer functions so electrical conduction is maintained through the right bundle. LBBB is more common in structural abnormalities of the heart such as in heart muscle conditions, high blood pressure or coronary artery narrowing.
LBBB affects approximately 1 in 150 of the population.
LBBB does not give symptoms in the absence of any other underlying heart abnormality,
Patients with LBBB usually require a heart ultrasound, a Holter ECG monitor and a stress test such as an exercise tolerance test to try and exclude associated heart conditions.
No, LBBB is not hereditary but it can be associated with conditions that are such as cardiomyopathies.
It can do. LBBB has been shown to be a marker for cardiac conditions that can increase the risk of heart failure and cardiac death. Patients with LBBB also have a higher lifetime risk of needing a pacemaker.
If you have been diagnosed with LBBB then a consultation will be offered to you with a local cardiologist to discuss any further tests or treatment.
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|Left Bundle Branch Block Leaflet (684 kb) - click to download|
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There are a large number of cardiac conditions that can be inherited or acquired.
Heart for Life have prepared information leaflets on some of the more common conditions, with explanations about what the conditions are, how they can affect you and possible future treatment and management options.