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11y ago

AV node.

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Q: What causes a heart block?
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What causes first-degree heart block?

First-degree heart block or AV (arterioventricular) block, or PR prolongation, is a disease of the electrical conduction system of the heart in which the PR interval is lengthened beyond 0.20 seconds.First-degree heart block rarely causes any symptoms or problems and normally remain undiagnozed.RegardsTime is imaginary


What causes right bundle branch block?

Right bundle branch block happens less often from underlying heart disease.


How can blocking an artery in the heart cause heart damge?

An artery is a pathway for the blood to travel to and from the heart. If the artery is block, the heart cannot release or receive blood, and therefore, causes heart problems.


How are coronary arteries involved in a heart attack?

A blocked (occluded) coronary artery is what causes a heart attack.


Does SA node damage cause heart block?

No, damage to the AV node causes total heart block, in which signals from the atria fail to reach the ventricles and the ventricles beat at their own intrinsic rhythm of 20 to 40 bpm.


Which is a very serious type of heart block in which no impulses are conducted to the ventricles?

third degree heart block


What is a second-degree heart block?

In second-degree heart block, not every impulse reaches its destination.


Does cholesterol block blood ciculation?

Cholesterol can play an important part in the material that causes the blocking of blood vessels leading to thrombosis stroke and heart attack.


What causes a loose engine block and can it be repaired?

it is not a cracked engine block it is just a loose block


What is the interruption of these impulses in the heart's conduction system?

Interruption of the impulses in the heart's conduction system is known as heart block. Heart block may be caused by scar tissue from a heart attack, among other things.


What is a third-degree heart block?

Third-degree block, also called complete heart block, is the most serious.


What causes an over sized heart condition?

One thing that I know of is " Congenital Antrioventricular Block". It CAN cause a heart to swell in size. Usually the person has irregular heart beats and eventually can need a pacemaker. I'm not saying this is what caused it in this specific question, but this is one that I know of. You should check out www.emedicine.com and look it up. It shows symptoms, causes, treatments, etc.