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Doctor insights on: How Do You Confirm The Presence Of Bundle Branch Block

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Dr. Daniel Saurborn
90 doctors shared insights

Bundle Branch Block (Definition)

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 ...Read more


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What is the medical prognosis for a bundle branch block?

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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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

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

Maybe: Most of the time a bundle branch block is not linked to any issues especially the right bundle a left bundle has been linked to CAD a work up including an echo and a stress test if waranted. ...Read more

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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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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