Where is the left bundle branch located?
The left branch is located between the muscular septum and the endocardium of the left ventricle.
What is a left bundle in the heart?
Left bundle branch block (LBBB) occurs when something blocks or disrupts the electrical impulse that causes your heart to beat. This block leads to an abnormal heart rhythm. A diagnosis of left bundle branch block often means that you have an underlying heart condition.
How serious is a left bundle branch block?
In older people with coronary artery disease, left bundle branch block is associated with greater risk of death. This is especially true for people with heart failure. Left bundle branch block is also linked to a greater risk of death after a heart attack.
What is the function of the left bundle branch?
With left bundle branch block, the bundle branch that distributes the electrical impulse to the left ventricle is wholly or partially blocked. 1 This blockage delays the response of the left ventricle. As a consequence, the right ventricle activates and contracts before the left ventricle is activated.
What happens if the left bundle branch is damaged?
These impulses travel along a pathway, including two branches called the right and the left bundles. If one or both of these branch bundles are damaged — due to a heart attack, for example — the electrical impulses can become blocked. As a result, the heart beats irregularly.
Which is worse left bundle branch block or right?
The major contribution of this large and long epidemiological study, deserving our admiration, to clinical cardiology is the confirmation that left bundle branch block heralds a much more unfavourable cardiovascular prognosis than the right one.
What is a left bundle branch blockage?
Left bundle branch block is a condition in which there’s a slowing along the electrical pathway to your heart’s left ventricle. When this happens, the electric impulse has to travel further to reach its endpoint. This makes it harder for your heart to pump blood efficiently.
What is the best treatment for LBBB?
First-line treatment of painful LBBB is usually sinus node suppression using beta-blockers or ivabradine. Alternative therapies include cardiac resynchronization therapy or His-bundle pacing. However, in some cases, right ventricular pacing alone may be sufficient to control patient symptoms.
Does exercise help left bundle branch block?
As previously reported by Heinsimer et al. [1], cardiac rehabilitation exercise training has been used to treat rate-related left bundle branch block with noted improvement in symptoms.
What is the most common cause of left bundle branch block?
Although LBBB is often associated with significant heart disease and is often the result of myocardial injury, strain or hypertrophy, it can also be seen in patients without any particular clinical disease.
Can LBBB be cured?
Unfortunately LBBB is not reversible. In your case, in the absence of any structural heart disease and symptoms, the overall risk of cardiovascular morbidity or mortality should be very low.
Which is worse left or right bundle branch block?
Is LBBB a serious heart condition?
A bundle branch block is either a complete or a partial interruption of the electrical pathways inside the wall of the heart. A block in the right bundle branch can occur in people who otherwise seem normal. If it happens with a heart attack, it can be a sign of serious heart muscle damage.