Question

What happens in the first degree atrioventricular block?

Answer 1

First-degree atrioventricular block:

1. First-degree atrioventricular (AV) block is a disorder of the heart's electrical conduction system.
2. During the first-degree atrioventricular block, electrical impulses travel to the ventricle from cardiac atria through the atrioventricular (AV) node more steadily than normal.
3. First- and second-degree blocks are just partial.
4. Third-degree blocks are finished; with a first-degree block, conduction is retarded but no beats are skipped.
5. QRS complexes follow the regular P waves, however, the PR interval is substantially longer (> 0.2 sec).
6. This disease is usually asymptomatic and is first found during a regular ECG.
7. Fibrosis in the AV node, certain medicines, vagal tone, electrolyte abnormalities, and other factors can all contribute to first-degree atrioventricular block.
8. Aside from frequent monitoring for growing conduction delay, the great majority of individuals require no therapy.
9. Regular monitoring is required since afflicted individuals are more likely to develop atrial fibrillation or a higher degree of AV block.