Atrioventricular block

Atrioventricular block (pronounced: ay-tree-oh-ven-TRIK-yuh-lur blok) is a type of heart block in which the conduction between the atria and ventricles of the heart is impaired.

Etymology

The term "Atrioventricular block" is derived from the Latin words "atrium" and "ventriculus", referring to the two types of heart chambers, and the English word "block", referring to an obstruction or hindrance.

Types of Atrioventricular Block

There are three types of atrioventricular block, classified by the degree to which the signal from the atria to the ventricles is blocked.

• First-degree Atrioventricular Block - This is the least severe type, in which all electrical signals from the atria reach the ventricles, but they are delayed.
• Second-degree Atrioventricular Block - In this type, some signals from the atria do not reach the ventricles. This is further divided into Mobitz type I and Mobitz type II.
• Third-degree Atrioventricular Block - This is the most severe type, in which no signals from the atria reach the ventricles. This is also known as complete heart block.

Symptoms

Symptoms of atrioventricular block can vary depending on the degree of the block. They may include fatigue, dizziness, fainting, or shortness of breath. In severe cases, it can lead to cardiac arrest.

Treatment

Treatment for atrioventricular block depends on the severity of the block and the symptoms. It may include medication, lifestyle changes, or the implantation of a pacemaker.

Related Terms

• Heart Block
• Cardiac Conduction System
• Electrocardiogram
• Pacemaker

External links

• Medical encyclopedia article on Atrioventricular block
• Wikipedia's article - Atrioventricular block

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