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Doctor insights on: Bundle Branch Block

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Dr. James Lin
97 Doctors shared insights

Bundle Branch Block (Overview)

There are 2 main branches of the heart's electrical system within the ventricles, the right bundle branch and the left bundle branch. Additionally, the left bundle branch has two sub-branches, the antero-superior fascicle and the posteroinferior fascicle. When one or more branches are disrupted, the resultant electrical abnormalities can be detected on an electrocardiogram.


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What is a bundle branch block?

What is a bundle branch block?

Wiring: The heart is a muscle but how fast it beats is controlled by special cells, sort of like electric wiring. The main wire divides into two, one to the right and one to the left. If part of that wiring becomes abnormal you get a right or left bundle branch block. It results in a typical pattern on the ekg. ...Read more

Dr. James Lin
97 Doctors shared insights

Bundle Branch Block (Overview)

There are 2 main branches of the heart's electrical system within the ventricles, the right bundle branch and the left bundle branch. Additionally, the left bundle branch has two sub-branches, the antero-superior fascicle and the posteroinferior fascicle. When one or more branches are disrupted, the resultant electrical abnormalities can be detected on an electrocardiogram.


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Is rt. Bundle branch block reversible?

RBBB: Rbbb is generally benign. Some of its causes are reversible and some are not. ...Read more

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What is incomplete bundle branch block?

What is incomplete bundle branch block?

Mild conduction prob: The righty and left ventricles are induced to beat through electrochemical currents transmitted through the right and left bundle branches, respectively. Irbbb means part of the right bundle is not transmitting fully. It is a benign condition of no significant clinical consequence. ...Read more

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What is an incomplete bundle branch block?

What is an incomplete bundle branch block?

Not true "block": Two bundles of electrical tissue carry each heartbeat from the top part of the heart to the bottom--the "right" and "left" bundle branches. When one of these doesn't conduct at all, or does so much more slowly than the other, it is a complete bundle branch block. When one conducts slightly slower than the other, it is called "incomplete" bundle block. This often is of no clinical consequence. ...Read more

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Is bundle branch block a serious condition?

Is bundle branch block a serious condition?

Bundle branch block: There are two types right bundle and left bundle branch block. Right bundle is most often benign or due to right ventricular hypertrophy. Left bundle is often caused by hypertension and left ventricular hypertrophy. Acute left bundle branch block can be very serious. Generally your physician can determine whether the bundle branch block has pathophysiologic significance. ...Read more

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Can certain medications cause bundle branch block?

Can certain medications cause bundle branch block?

BBB: Certaiin common blood pressure medications and/or antiarrhythmics in very high (not therapeutic) doses can cause bundle branch blocks. Digoxin is very well known to cause conduction abnormalities when in toxic levels. ...Read more

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What is the medical prognosis for a bundle branch block?

Right or left: If it is right bundle branch block then 98% is benign. If it is left bundle branch block 95% are abnormal leading to further work up to rule out cardiomyopathy, conduction problems or coronary artery disease. ...Read more

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Is repetitive drug use the cause of a bundle branch block?

Depends, of course: Most cases of bundle branch block are due to a focal injury to a key part of the heart's electrical conduction system. Coronary disease, scarring from trauma, infection, or natural processes can cause it. Some illicit drugs, especially those creating coronary spasm (e.g., cocaine, amphetamines) may create those conditions, and frequent exposure (repetitive) only exacerbates the risk. ...Read more

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What is the prognosis for an incomplete bundle branch block?

BBB: There are two types: right and left (irbbb and ilbbb). The right sided variety is usually benign and has no negative prognosis. The left variety may or may not indicate underlying heart problems. Discuss with your doctor. ...Read more

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What is the definition or description of: bundle branch block?

Electrical blocks: There are 2 main branches of the heart's electrical system within the ventricles, the right bundle branch and the left bundle branch. Additionally, the left bundle branch has two sub-branches, the antero-superior fascicle and the posteroinferior fascicle. When one or more branches are disrupted, the resultant electrical abnormalities can be detected on an electrocardiogram. ...Read more

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Ar there medications to avoid when pt has a bundle branch block?

Avoid vs minimize: There are several GROUPS of drugs we would not use or use at very low doses with extreme caution, including but not limited to beta blockers, some calcium channel blockers, some anti arrhythmia drugs (actually most of them), among others ...Read more

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Are there more serious blockages that bundle branch block can lead to?

Yes if left bundle: Left bundle branch block is often associated with coronary artery disease and risk of heart attack. This would warrant further investigation with your doctor. Somewhat surprisingly, right bundle branch block is usually benign and not associated with any serious diseases. ...Read more

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What's the difference between a complete bundle branch block and an incomplete bundle branch block?

Ecg: Complete bundle branch block has slowing of conduction in that bundle of 0.12 sec or greater, incomplete block is range 0.10--.12sec. This is measured on ecg. ...Read more

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Can bundle branch block be fatal?

Not usually: Right bundle branch block is pretty benign. Most cases of left bundle branch block are associated with significant heart disease. It is the severity of that heart disease and the type of disease which could lead to a fatal outcome. The bundle branch block itself is not likely to be fatal. If it progressed to complete heart block, then a pacemaker would be needed and conceivably it could be fatal. ...Read more

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What is a right bundle branch block?

What is a right bundle branch block?

Abnormal conduction: The signal to beat is distributed to through the heart by a specialized electrical system. The right bundle is one of the branches of this system. If conduction through the right bundle is slowed or blocked the parts of the heart it serves will contract late, seen as widening of the electrocardiographic qrs-wave. Unless the remainder of the conduction system fails, it usually isn't a problem. ...Read more

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Is right bundle branch block serious?

Is right bundle branch block serious?

Depends: Right bundle branch block (rbbb) in and of itself is likely not a detrimental issue, however if it happens in the setting of a heart attack, it portends a poor prognosis. ...Read more

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Is left bundle branch block reversible?

Is left bundle branch block reversible?

Yes: It is sometimes seen intermittently. It can be present on an EKG and not on one done at a later date. At times it occurs when the heart is beating fast but not with slower heart rates. ...Read more

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Can you treat right bundle branch block?

Not necessary: Isolated rbbb does not require treatment. Sometimes, bbbs are a market for other problems: cardiomyopathy, endocarditis, lyme disease. In that case the underlying cause should be treated. ...Read more

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How do you treat left bundle branch block?

Treatment of LBBB: There is no specific treatment for left bundle branch block. However, treatment is directed at the underlying cause of this conduction disturbance. ...Read more

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How can left bundle branch block be treated?

It isn't: Treated but factors contributing or causing may need to be...Talk to your physician. ...Read more

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What are causes of left bundle branch block?

What are causes of left bundle branch block?

Various causes: Left bundle branch block is a pattern seen on an EKG indicating an abnormal or different pathway of the electrical signal that causes the heart muscle to contract. It is most often due to an underlying medical condition such as hypertension, a heart attack, an enlarged heart from any cause and only when serious conditions are excluded is it felt due to the benign aging of the conduction pathway. ...Read more

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Is left bundle branch block life shortening?

Is left bundle branch block life shortening?

Possibly: As most people with LBBB have heart muscle abnormalities, yes. But about 15% of people with left bundle branch block have structurally normal hearts, so the answer is maybe or sometimes. ...Read more

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How do doctors diagnose bundle branch block?

EKG: An EKG shows a wide qrs in a certain pattern. ...Read more

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What are causes of right bundle branch block?

Many: It can be congenital. It is often present with right ventricular or right atrial pressure or volume overload such as occurs with atrial or ventricular septal defect. Hypertension causes many cases. Pulmonary artery hypertension, as occurs in advanced lung disease or pulmonary embolism, can cause it. Finally, it's present in many healthy people for no reason at all. ...Read more

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How does someone prevent bundle branch block?

Difficult: Most bundle branch is a result of the aging process and aging in the conducation system. This not preventable. However, some bbb is result of aquired disease states including coronary disease. So a healthy life-style, blood pressure, cholesterol, sugar control, diet and excercise are good ways to start. ...Read more

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Will left bundle branch block cells regenerate?

Usually not: Left bundle branch block (lbbb) develops when 2/3 electrical "wires" in the heart stop working. Many patients can have LBBB and no sx. Lbbb usually reflects aging of the heart but can be seen in a variety of pathological heart conditions. Rarely, medicines which affect the speed of electrical conduction in the heart can cause LBBB which reverses. This technically not cellular regeneration. ...Read more

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What is an incomplete right bundle branch block?

What is an incomplete right bundle branch block?

Slowing: It means there is a mild slowing of the electrical conduction in a certain part of your heart. In most cases it is an incidental finding and not worrisome. ...Read more

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Can you explain incomplete right bundle branch block?

Can you explain incomplete right bundle branch block?

Mild condabrupt prob: The righty and left ventricles are induced to beat through electrochemical currents transmitted through the right and left bundle branches, respectively. Irbbb means part of the right bundle is not transmitting fully. It is a benign condition of no significant clinical consequence. ...Read more