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What are Atrioventricular Blocks? – Video
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Video at a Glance
- AV blocks represent varying degrees of blockage of impulses from the atria to the ventricles.
- In a first-degree AV block, the PR interval is uniformly prolonged.
- The hallmark of the second-degree type 1 block is an increasing PR interval until a QRS complex is dropped.
- In a second-degree type 2 AV block, the P-waves “march through” in a consistent manner.
- In a third-degree block, there is a complete dissociation between the atria and ventricles, with each beating at an independent rate.
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