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- $Unique_ID{BRK00753}
- $Pretitle{}
- $Title{What is "Bundle Branch Blockage"?}
- $Subject{cardiogram block Circulatory sinus node atrioventricular electrical
- impulse tracts branches Bundle Branch Blockage atria ventricles ventricle
- electrical impulse impulses nervous system heart sinuses nodes}
- $Volume{G-1}
- $Log{}
-
- Copyright (c) 1991-92,1993 Tribune Media Services, Inc.
-
-
- What is "Bundle Branch Blockage"?
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-
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-
- QUESTION: I am a 27 year old female in good health. However a recent EKG
- turned up a "bundle branch blockage". The doctor says it is an interruption
- in the heart's electromagnetic field. What else can you tell me about it?
-
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-
- ANSWER: Your question is a difficult to answer in easy to understand language
- and I think your physician gave it a good try. Like mud, it's not too clear
- but it covers the ground. The heart muscles contract in response to
- electrical impulses which follow specific pathways in the heart itself. The
- impulse is first generated in a special tissue area of the heart known as the
- sinus node. From there it spreads out through the muscle cells of the atria
- (the upper two of the heart's four chambers). That causes the atria to beat a
- fraction of a second before the ventricles do. The ventricles are the larger
- and lower two of the heart's chambers, the right ventricle pushing the blood
- through the lungs, and the left ventricle has the biggest job of all, pushing
- blood through the aorta to the entire body. When the nerve impulses have
- crossed the atria, they meet at another special area at the junction of the
- atria and ventricles. This tissue, not surprisingly, is called the
- atrioventricular node. It captures the impulses from the atria, delays them
- slightly to allow all the blood to pass from the contracting atria into the
- ventricles, and then passes the electrical impulse on. Normally there are two
- special tracts (or branches) to carry the impulse throughout the ventricles, a
- left bundle branch and a right bundle branch. They carry the impulse to the
- ventricles which then contract together, completing the cycle of one heart
- beat. Now we come to your problem. One of these branches, although you did
- not specify I suspect it is the right one, is not carrying the impulses as it
- should, or "blocking" them. Thus the name "bundle branch block". The reason
- I think that it is your right branch that is affected is because this can
- occur in people with no other signs of heart problems, and because you mention
- no treatment for your problem. When this block occurs, an EKG which charts
- the impulses can reveal the blockage by providing a typical tracing that your
- physician has used to make the diagnosis. The bottom line; I doubt that you
- have any cause for concern, but now that you understand about bundle branch
- blocks, check back with your doctor.
-
- ----------------
-
- The material contained here is "FOR INFORMATION ONLY" and should not replace
- the counsel and advice of your personal physician. Promptly consulting your
- doctor is the best path to a quick and successful resolution of any medical
- problem.
-