Cardiology AV Node

Question 1

What chagorises a 1st degree AV block

Answer 1

This is where there is a longer delay at our AV node. Resulting in a longer than norm >0.20 secs PRI

The elongation is always consistent and usually is associated with a 1:1 conduction between P waves and QRS complexes

Question 2

What charagorizes a 2nd degree type 1 heart block

Answer 2

This is also called Wenbacke

This is where the PRI gets progressively longer and then eventually drops. So a P wave will not get conducted into a corresponding QRS

This drop happens becaase eventually the P wave will hit on the refractory period of the AV node so no conduction will go through

Question 3

What is a 2nd degree type 2

Answer 3

Also known as a mobitz type 2 this is where there are norm PRI but the P waves to not always correlate to a corresponding QRS complex

Question 4

What is 3RD degree heart block

Answer 4

This is where there is no relationship between the artia and the ventricles.

As a result there is pace maker cells in the lower areas of the heart

Question 5