Lab 6

Question 1

What are the causes of heart block

Answer 1

age related wear and tear of muscle , disesase that cause scarring, scar tissue, and side effects of medications

Question 2

What is the the SA block (Junctional Rhythm)?

Answer 2

when AV node become the pacemaker

Question 3

What happens during a SA block and what does it look like?

Answer 3

-electrical signal escapes the top and bottom of the AV node at the same time
- meaning that the p wave and QRS will occur at the same time
- p wave is not seen on EKG

Question 4

First Degree AV Block

Answer 4

delay in transmission of the impulse from the atria to the ventricles. it reflects in the PR interval; prolonged PR interval in all leads

Question 5

Second degree AV block Mobitz 1

Answer 5

• increasing PR intervals, increasing until th QRS is dropped or missing
• how?= p wave is seen buth the impulse does not initiate a ventricular response therefor it is dropped

Question 6

Second degree AV block type 2

Answer 6

-known as fixed rate where there are multiple P waves prior to the QRS complex
- will have a ration to the amount of p waves seen to the QRS complex

Question 7

Third degree AV Block ( Complete Heart Block) Most sever

Answer 7

-no asscoaition between the atria and the ventricles
- signal stops at the AV node so a second pacemakes pacemakeer must become active below the block to generate the QRS complex